ORCID Profile
0000-0001-8012-0114
Current Organisation
Flinders University
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Palaeontology (incl. Palynology) | Palaeoecology | Ecology | Animal Structure and Function | Geology | Animal Systematics, Taxonomy And Phylogeny | Palaeontology | Biogeography | Biomechanical Engineering | Biomedical Engineering | Structural Engineering | Ecology And Evolution Not Elsewhere Classified |
ANZSRC Socio-Economic Objective (SEO)
Preserving movable cultural heritage | Conserving Natural Heritage | Expanding Knowledge in the Biological Sciences | Biological sciences | Earth sciences | Expanding Knowledge in the Earth Sciences | Environmentally Sustainable Commercial Services and Tourism not elsewhere classified | Environmental Education and Awareness | Metals (e.g. Composites, Coatings, Bonding) | Expanding Knowledge in Engineering | Conserving Collections and Movable Cultural Heritage | Expanding Knowledge in the Agricultural and Veterinary Sciences
Related Links
Publications
Bayesian Morphological ClockMethods Resurrect Placoderm Monophyly and Reveal Rapid Early Evolution in Jawed Vertebrates
Publisher: Oxford University Press (OUP)
Date: 05-12-2016
Abstract: The phylogeny of early gnathostomes provides an important framework for understanding one of the most significant evolutionary events, the origin and ersification of jawed vertebrates. A series of recent cladistic analyses have suggested that the placoderms, an extinct group of armoured fish, form a paraphyletic group basal to all other jawed vertebrates. We revised and expanded this morphological data set, most notably by s ling autapomorphies in a similar way to parsimony-informative traits, thus ensuring this data (unlike most existing morphological data sets) satisfied an important assumption of Bayesian tip-dated morphological clock approaches. We also found problems with characters supporting placoderm paraphyly, including character correlation and incorrect codings. Analysis of this data set reveals that paraphyly and monophyly of core placoderms (excluding maxillate forms) are essentially equally parsimonious. The two alternative topologies have different root positions for the jawed vertebrates but are otherwise similar. However, analysis using tip-dated clock methods reveals strong support for placoderm monophyly, due to this analysis favoring trees with more balanced rates of evolution. Furthermore, enforcing placoderm paraphyly results in higher levels and unusual patterns of rate heterogeneity among branches, similar to that generated from simulated trees reconstructed with incorrect root positions. These simulations also show that Bayesian tip-dated clock methods outperform parsimony when the outgroup is largely uninformative (e.g., due to inapplicable characters), as might be the case here. The analysis also reveals that gnathostomes underwent a rapid burst of evolution during the Silurian period which declined during the Early Devonian. This rapid evolution during a period with few articulated fossils might partly explain the difficulty in ascertaining the root position of jawed vertebrates.
Fossil musculature of the most primitive jawed vertebrates
Publisher: American Association for the Advancement of Science (AAAS)
Date: 12-07-2013
Abstract: The earliest vertebrates were jawless. Past reconstructions have assumed that the primitive jawed condition was much like that found in sharks. Trinajstic et al. (p. 160 , published online 13 June see the Perspective by Kuratani ) describe fossil musculature from the early jawed placoderms (an extinct class of armored prehistoric fish) that show that the basal structure was distinct from that found in sharks, having a notable dermal joint between the skull and shoulder girdle.
Oldest coelacanth, from the Early Devonian of Australia
Publisher: The Royal Society
Date: 21-03-2006
Abstract: Coelacanths are well-known sarcopterygian (lobe-finned) fishes, which together with lungfishes are the closest extant relatives of land vertebrates (tetrapods). Coelacanths have both living representatives and a rich fossil record, but lack fossils older than the late Middle Devonian (385–390 Myr ago), conflicting with current phylogenies implying coelacanths erged from other sarcopterygians in the earliest Devonian (410–415 Myr ago). Here, we report the discovery of a new coelacanth from the Early Devonian of Australia (407–409 Myr ago), which fills in the approximately 20 Myr ‘ghost range’ between previous coelacanth records and the predicted origin of the group. This taxon is based on a single lower jaw bone, the dentary, which is deep and short in form and possesses a dentary sensory pore, otherwise seen in Carboniferous and younger taxa.
Neurocranial anatomy of an enigmatic Early Devonian fish sheds light on early osteichthyan evolution
Publisher: eLife Sciences Publications, Ltd
Date: 29-05-2018
DOI: 10.7554/ELIFE.34349
Abstract: The skull of ‘Ligulalepis’ from the Early Devonian of Australia (AM-F101607) has significantly expanded our knowledge of early osteichthyan anatomy, but its phylogenetic position has remained uncertain. We herein describe a second skull of ‘Ligulalepis’ and present micro-CT data on both specimens to reveal novel anatomical features, including cranial endocasts. Several features previously considered to link ‘Ligulalepis’ with actinopterygians are now considered generalized osteichthyan characters or of uncertain polarity. The presence of a lateral cranial canal is shown to be variable in its development between specimens. Other notable new features include the presence of a pineal foramen, the some detail of skull roof sutures, the shape of the nasal capsules, a placoderm-like hypophysial vein, and a chondrichthyan-like labyrinth system. New phylogenetic analyses place ‘Ligulalepis’ as a stem osteichthyan, specifically as the sister taxon to ‘psarolepids’ plus crown osteichthyans. The precise position of ‘psarolepids’ differs between parsimony and Bayesian analyses.
Severe Selenium depletion in the Phanerozoic oceans as a factor in three global mass extinction events
Publisher: Elsevier BV
Date: 08-2016
First Shark from the Late Devonian (Frasnian) Gogo Formation, Western Australia Sheds New Light on the Development of Tessellated Calcified Cartilage
Publisher: Public Library of Science (PLoS)
Date: 28-05-2015
Reviews : Sam Whimster and Scott Lash, Max Weber, Rationality and Modernity (Allen and Unwin, London, 1987)
Publisher: SAGE Publications
Date: 05-1988
Heterochrony and the origin of tetrapods
Publisher: Scandinavian University Press / Universitetsforlaget AS
Date: 04-1990
Some Stops for Summer Trips
Publisher: American Association for the Advancement of Science (AAAS)
Date: 02-07-2010
Abstract: We offer short reviews of exhibitions, sites, and events that could provide a science-related stop on your summer travels.
An arid-adapted middle Pleistocene vertebrate fauna from south-central Australia
Publisher: Springer Science and Business Media LLC
Date: 2007
DOI: 10.1038/NATURE05471
Abstract: How well the ecology, zoogeography and evolution of modern biotas is understood depends substantially on knowledge of the Pleistocene. Australia has one of the most distinctive, but least understood, Pleistocene faunas. Records from the western half of the continent are especially rare. Here we report on a erse and exceptionally well preserved middle Pleistocene vertebrate assemblage from caves beneath the arid, treeless Nullarbor plain of south-central Australia. Many taxa are represented by whole skeletons, which together serve as a template for identifying fragmentary, hitherto indeterminate, remains collected previously from Pleistocene sites across southern Australia. A remarkable eight of the 23 Nullarbor kangaroos are new, including two tree-kangaroos. The erse herbivore assemblage implies substantially greater floristic ersity than that of the modern shrub steppe, but all other faunal and stable-isotope data indicate that the climate was very similar to today. Because the 21 Nullarbor species that did not survive the Pleistocene were well adapted to dry conditions, climate change (specifically, increased aridity) is unlikely to have been significant in their extinction.
The Spectre Of Overwork: An Analysis Of Trends Between 1974 And 1997 Using Australian Time-Use Diaries
Publisher: Informa UK Limited
Date: 2002
Neurocranial development of the coelacanth and the evolution of the sarcopterygian head
Publisher: Springer Science and Business Media LLC
Date: 17-04-2019
DOI: 10.1038/S41586-019-1117-3
Abstract: The neurocranium of sarcopterygian fishes was originally ided into an anterior (ethmosphenoid) and posterior (otoccipital) portion by an intracranial joint, and underwent major changes in its overall geometry before fusing into a single unit in lungfishes and early tetrapods
The body musculature of arthrodire placoderms (Abstract)
Publisher: Informa UK Limited
Date: 09-2009
Parenthood Without Penalty: Time Use And Public Policy In Australia And Finland
Publisher: Informa UK Limited
Date: 1999
Live birth in the Devonian period
Publisher: Springer Science and Business Media LLC
Date: 05-2008
DOI: 10.1038/NATURE06966
Abstract: The extinct placoderm fishes were the dominant group of vertebrates throughout the Middle Palaeozoic era, yet controversy about their relationships within the gnathostomes (jawed vertebrates) is partly due to different interpretations of their reproductive biology. Here we document the oldest record of a live-bearing vertebrate in a new ptyctodontid placoderm, Materpiscis attenboroughi gen. et sp. nov., from the Late Devonian Gogo Formation of Australia (approximately 380 million years ago). The new specimen, remarkably preserved in three dimensions, contains a single, intra-uterine embryo connected by a permineralized umbilical cord. An amorphous crystalline mass near the umbilical cord possibly represents the recrystallized yolk sac. Another ptyctodont from the Gogo Formation, Austroptyctodus gardineri, also shows three small embryos inside it in the same position. Ptyctodontids have already provided the oldest definite evidence for vertebrate copulation, and the new specimens confirm that some placoderms had a remarkably advanced reproductive biology, comparable to that of some modern sharks and rays. The new discovery points to internal fertilization and viviparity in vertebrates as originating earliest within placoderms.
The time cost of care
Publisher: Forschungsinstitut Freie Berufe
Date: 10-2005
28 Working Time
Publisher: SAGE Publications Ltd
Date: 2015
Elpistostege and the origin of the vertebrate hand
Publisher: Springer Science and Business Media LLC
Date: 18-03-2020
Copulation in antiarch placoderms and the origin of gnathostome internal fertilisation
Publisher: Springer Science and Business Media LLC
Date: 19-10-2015
DOI: 10.1038/NATURE13825
Abstract: Reproduction in jawed vertebrates (gnathostomes) involves either external or internal fertilization. It is commonly argued that internal fertilization can evolve from external, but not the reverse. Male copulatory claspers are present in certain placoderms, fossil jawed vertebrates retrieved as a paraphyletic segment of the gnathostome stem group in recent studies. This suggests that internal fertilization could be primitive for gnathostomes, but such a conclusion depends on demonstrating that copulation was not just a specialized feature of certain placoderm subgroups. The reproductive biology of antiarchs, consistently identified as the least crownward placoderms and thus of great interest in this context, has until now remained unknown. Here we show that certain antiarchs possessed dermal claspers in the males, while females bore paired dermal plates inferred to have facilitated copulation. These structures are not associated with pelvic fins. The clasper morphology resembles that of ptyctodonts, a more crownward placoderm group, suggesting that all placoderm claspers are homologous and that internal fertilization characterized all placoderms. This implies that external fertilization and spawning, which characterize most extant aquatic gnathostomes, must be derived from internal fertilization, even though this transformation has been thought implausible. Alternatively, the substantial morphological evidence for placoderm paraphyly must be rejected.
An exceptional Devonian fish from Australia sheds light on tetrapod origins
Publisher: Springer Science and Business Media LLC
Date: 18-10-2006
DOI: 10.1038/NATURE05243
Abstract: The transition from fishes to tetrapods was one of the most dramatic events in the evolution of vertebrates, but many pivotal fossils are incomplete, resulting in gaps in the data that are used for phylogenetic reconstruction. Here we present new observations from the most complete, acid-prepared Devonian tetrapodomorph fish yet discovered, Gogonasus, which was previously placed just crownward of Kenichthys and rhizodontids, the most primitive taxa on the tetrapod lineage. Unexpectedly, Gogonasus shows a mosaic of plesiomorphic and derived tetrapod-like features. Whereas the braincase and dermal cranial skeleton exhibit generalized morphologies with respect to Eusthenopteron or Panderichthys, taxa that are traditionally considered to be phyletically close to tetrapods, the presence of a deeply invaginated, wide spiracle, advanced internal spiracular architecture and near-horizontal hyomandibula are specialized features that are absent from Eusthenopteron. Furthermore, the pectoral fin skeleton of Gogonasus shares several features with that of Tiktaalik, the most tetrapod-like fish. A new phylogenetic analysis places Gogonasus crownward of Eusthenopteron as the sister taxon to the Elpistostegalia. Aspects of the basic tetrapod limb skeleton and middle ear architecture can now be traced further back within the tetrapodomorph radiation.
The effect of long-term atmospheric changes on the macroevolution of birds
Publisher: Elsevier BV
Date: 2019
The Fossil Record of Lungfishes
Publisher: Science Publishers
Date: 29-11-2010
DOI: 10.1201/B10357-2
Early-Middle Palaeozoic biogeography of Asian terranes derived from Gondwana
Publisher: Geological Society of London
Date: 1990
Equality and gender, divided versus multiple subjectivity: a response to Allon J. Uhlmann's 'The sociology of subjectivity, and the subjectivity of sociologists'
Publisher: Wiley
Date: 09-2004
New information on the enigmatic tetrapodomorph fish Marsdenichthys longioccipitus (Long, 1985)
Publisher: Informa UK Limited
Date: 29-01-2010
A new genus and species of ptyctodont (Placodermi) from the Late Devonian Gneudna Formation, Western Australia, and an analysis of ptyctodont phylogeny
Publisher: Cambridge University Press (CUP)
Date: 15-07-2009
DOI: 10.1017/S001675680900644X
Abstract: An almost complete but predominantly disarticulated ptyctodont fish, Kimbryanodus williamburyensis n. gen., n.sp. from the Late Devonian Gneudna Formation, is described. The fossils occur as three-dimensionally preserved isolated plates, and this has allowed the reconstruction of the fish. A taxonomic revision of the ptyctodonts was undertaken based on recently described Australian taxa and new reconstructions of Australian, American and European specimens. The phylogenetic analysis supports a threefold ision of the ptyctodonts, with Rh hodopsis being the most basal taxon and the other ptyctodonts ided into those possessing a median dorsal spine, spinal plate and simple V-shaped overlap of the anterior lateral and anterior dorsolateral plates and those taxa which do not.
Brain Reconstruction Across the Fish-Tetrapod Transition; Insights From Modern Amphibians
Publisher: Frontiers Media SA
Date: 19-03-2021
Abstract: The fish-tetrapod transition (which incorporates the related fin-limb and water-land transitions) is celebrated as one of the most important junctions in vertebrate evolution. Sarcopterygian fishes (the “lobe-fins”) are today represented by lungfishes and coelacanths, but during the Paleozoic they were much more erse. It was some of these sarcopterygians, a lineage of the tetrapodomorph fishes, that gave rise to tetrapods (terrestrial vertebrates with limbs bearing digits). This spectacular leap took place during the Devonian Period. Due to the nature of preservation, it is the hard parts of an animal’s body that are most likely to fossilize, while soft tissues such as muscular and brain tissues, typically fail to do so. Thus, our understanding of the adaptations of the hard skeletal structures of vertebrates is considerably greater than that of the soft tissue systems. Fortunately, the braincases of early vertebrates are often ossified and thereby have the potential to provide detailed morphological information. However, the correspondence between brain and endocast (an internal mold of the cavity) has historically been considered poor in most “lower” vertebrates and consequently neglected in such studies of brain evolution. Despite this, recent work documenting the spatial relationship in extant basal sarcopterygians (coelacanth, lungfish, axolotl, and salamander) has highlighted that this is not uniformly the case. Herein, we quantify and illustrate the brain-endocast relationship in four additional extant basal tetrapod exemplars: neobatrachian anurans (frogs) Breviceps poweri and Ceratophrys ornata and gymnophionans (caecilians) Gegeneophis ramaswamii and Rhinatrema bivittatum . We show that anurans and caecilians appear to have brains that fill their endocasts to a similar degree to that of lungfishes and salamanders, but not coelacanth. Ceratophrys has considerably lower correspondence between the brain and endocast in the olfactory tract and mesencephalic regions, while Breviceps has low correspondence along its ventral endocranial margin. The brains of caecilians reflect their endocasts most closely (vol. ∼70%). The telencephalon is tightly fitted within the endocast in all four taxa. Our findings highlight the need to adequately assess the brain-endocast relationship in a broad range of vertebrates, in order to inform neural reconstructions of fossil taxa using the Extant Phylogenetic Bracket approach and future studies of brain evolution.
Comment: “Time Use and Subjective Well-being in France and the US”
Publisher: Springer Science and Business Media LLC
Date: 16-01-2009
Tubular phosphatic microproblematica from the Early Ordovician of China
Publisher: Scandinavian University Press / Universitetsforlaget AS
Date: 10-1989
L’origine phylogénétique des doigts
Publisher: EDP Sciences
Date: 12-2020
THE CHANGING BOUNDARY BETWEEN HOME AND MARKET: AUSTRALIAN TRENDS IN OUTSOURCING DOMESTIC LABOUR
Publisher: Cambridge University Press (CUP)
Date: 06-1999
A Bourgeois Marx? Max Weber's Theory of Capitalist Society: Reflections on utility, rationality and class formation
Publisher: SAGE Publications
Date: 08-1986
New information on Brindabellaspis stensioi Young, 1980, highlights morphological disparity in Early Devonian placoderms
Publisher: The Royal Society
Date: 06-2018
DOI: 10.1098/RSOS.180094
Abstract: Acid-prepared specimens of the placoderm Brindabellaspis stensioi (Early Devonian of New South Wales, Australia) revealed placoderm endocranial anatomy in unprecedented detail. Brindabellaspis has become a key taxon in discussions of early gnathostome phylogeny, and the question of placoderm monophyly versus paraphyly. The anterior orientation of the facial nerve and related hyoid arch structures in this taxon resemble fossil osteostracans (jawless vertebrates) rather than other early gnathostomes. New specimens of Brindabellaspis now reveal the previously unknown anterior region of the skull, including an exceptionally elongate premedian bone forming a long rostrum, supported by a thin extension of the postethmo-occipital unit of the braincase. Lateral overlap surfaces indicate an unusual anterior position for the jaws. Digital rendering of a synchrotron radiation scan reveals a uniquely specialized ethmoid commissure sensory canal, doubled back and fused into a midline canal. The visceral surface of the premedian bone has a plexus of perichondral bone canals. An updated skull roof reconstruction of Brindabellaspis adds to the highly variable dermal skull patterns of the probably non-monophyletic ‘acanthothoracids'. The unusual morphology revealed by the new specimens suggests that the earliest known reef fish fauna contained a erse range of fishes with specialized ecological roles.
The Gogo Formation Lagerstätte: a view of Australia's first great barrier reef
Publisher: Geological Society of London
Date: 23-11-2022
DOI: 10.1144/JGS2021-105
A new actinopterygian from the Late Devonian Gogo Formation, Western Australia
Publisher: Wiley
Date: 16-12-2018
DOI: 10.1002/SPP2.1243
Allometry in the placoderm Bothriolepis canadensis and its significance to antiarch evolution
Publisher: Scandinavian University Press / Universitetsforlaget AS
Date: 04-1986
Do working mothers raise couch potato kids? Maternal employment and children's lifestyle behaviours and weight in early childhood
Publisher: Elsevier BV
Date: 06-2010
DOI: 10.1016/J.SOCSCIMED.2010.01.040
Abstract: Alarm about the increasing prevalence of childhood obesity has focussed attention on in idual lifestyle behaviours that may contribute to unhealthy weight. More distal predictors such as maternal employment may also be implicated since working mothers have less time to supervise children's daily activities. The research reported here used two waves of data from the Longitudinal Study of Australian Children to investigate whether mothers' hours in paid work shape young children's television viewing, snacking and physical activity, and through those lifestyle behaviours, children's weight at ages 4-5 years and 6-7 years. At both ages, children's lifestyle behaviours were interrelated and associated with weight status. Cross-sectional analysis confirmed small, direct associations between longer hours of maternal employment and child weight at age 4-5 years, but not with child's weight measured two years later. In both the cross-sectional and prospective analyses, the children of mothers who worked part-time watched less television and were less likely to be overweight than children of mothers who were not employed or who worked full-time. While associations were small, they remained significant after adjustment for maternal weight, household income and other factors. The combination of direct and indirect relationships between mothers' work hours and the weight status of their young children provides additional support to calls for family-friendly work policies as an important means for promoting healthy family lifestyles and early childhood wellbeing.
Australians' changing use of time, 1974?1987
Publisher: Springer Science and Business Media LLC
Date: 11-1993
DOI: 10.1007/BF01078721
Evolution of vertebrate postcranial complexity: axial skeleton regionalization and paired appendages in a Devonian jawless fish
Publisher: Wiley
Date: 05-07-2018
DOI: 10.1111/PALA.12379
Disarticulated acanthodian and chondrichthyan remains from the upper Middle Devonian Aztec Siltstone, southern Victoria land, Antarctica
Publisher: Cambridge University Press (CUP)
Date: 04-09-2009
DOI: 10.1017/S0954102008001521
Abstract: Well-preserved vertebrate microremains are abundant in the residues from a calcareous grey siltstone in the karawaka biozone (?late Givetian) of the Aztec Siltstone at Mount Crean, Lashly Mountains, Antarctica. Acanthodians are represented by scales of acritolepid Pechoralepis juozasi sp. nov., climatiid Nostolepis sp. cf. N. gaujensis Valiukevičius, diplacanthid Milesacanthus antarctica Young & Burrow, and an undetermined acanthodiform. The acanthodian assemblage resembles those from early Frasnian carbonates of central Iran. Chondrichthyan elements in the fauna include rare teeth of Aztecodus harmsenae Long & Young and Antarctilamna prisca Young, ctenacanthoid-type scales and branchial denticles which are possibly from Antarctilamna , and scales of an indeterminate chondrichthyan. An isolated set of acanthodid acanthodiform jaws from the uppermost ‘phyllolepid’ biozone of the Aztec Siltstone at Mount Ritchie, Warren Range, Antarctica is also described.
The incremental time costs of children: An analysis of children's impact on adult time use in Australia
Publisher: Informa UK Limited
Date: 04-2008
Spiracular air breathing in polypterid fishes and its implications for aerial respiration in stem tetrapods
Publisher: Springer Science and Business Media LLC
Date: 23-01-2014
DOI: 10.1038/NCOMMS4022
Abstract: The polypterids (bichirs and ropefish) are extant basal actinopterygian (ray-finned) fishes that breathe air and share similarities with extant lobe-finned sarcopterygians (lungfishes and tetrapods) in lung structure. They are also similar to some fossil sarcopterygians, including stem tetrapods, in having large paired openings (spiracles) on top of their head. The role of spiracles in polypterid respiration has been unclear, with early reports suggesting that polypterids could inhale air through the spiracles, while later reports have largely dismissed such observations. Here we resolve the 100-year-old mystery by presenting structural, behavioural, video, kinematic and pressure data that show spiracle-mediated aspiration accounts for up to 93% of all air breaths in four species of Polypterus. Similarity in the size and position of polypterid spiracles with those of some stem tetrapods suggests that spiracular air breathing may have been an important respiratory strategy during the fish-tetrapod transition from water to land.
On the phylogenetic position ofGogonasus andrewsae Long 1985, within the Tetrapodomorpha
Publisher: Wiley
Date: 05-2009
A new late devonian bothriolepid (Placodermi, antiarcha) from victoria, with descriptions of other species from the state
Publisher: Informa UK Limited
Date: 1986
A review of recent discoveries of exceptionally preserved fossil fishes from the Gogo sites (Late Devonian, Western Australia)
Publisher: Cambridge University Press (CUP)
Date: 03-2018
DOI: 10.1017/S1755691018000178
Abstract: Significant new material of Late Devonian Gogo Formation fish fossils is still surfacing. Collecting in the past decade has uncovered the first Gogo shark fossils ( Gogoselachus plus another new undescribed taxon), the first acanthodian ( Halmacanthodes ahlbergi ), the first coelacanth, as well as the first placoderm embryos. Recent studies have elucidated the nature of placoderm claspers, pelvic girdles, synarcuals and embryos, the structure of their teeth, a description of well-preserved muscles in placoderms, and how muscles attach to bones. Molecular biomarkers have also been identified in Gogo fossils. There are now five basal ray-fin fishes in the fauna, including one undescribed new taxon. The lungfish fauna from Gogo is the most erse known for any Devonian site, with 10 genera and 12 species. The dermal skeleton and endocast of the dipterid Rhinodipterus kimberleyensis have been described in detail from CT scans and the ontogenetic stages of neurocranium formation in Griphognathus . New specimens of the tetrapodomorph fish Gogonasus andrewsae have shed further light on its endocranium, pectoral girdle and fin. Through their exceptional preservation of both hard and varied kinds of soft tissues, the Gogo fishes remain crucial for resolving key debates on the ersification, physiology, biomechanics and phylogenetic relationships of early gnathostomes.
The postcranial anatomy of two Middle Devonian lungfishes (Osteichthyes, Dipnoi) from Mt. Howitt, Victoria, Australia
Publisher: Museums Victoria
Date: 2009
Families without Borders: Mobile Phones, Connectedness and Work-Home Divisions
Publisher: SAGE Publications
Date: 08-2008
Abstract: This article examines the widespread proposition that the mobile phone dissolves the boundaries that separate work and home, extending the reach of work. It analyses data derived from a purpose-designed survey to study social practices surrounding mobile phone use.The key components of the survey investigated here are a questionnaire and a log of phone calls retrieved from respondents' handsets. Rather than being primarily a tool of work extension, or even a tool that facilitates greater work-family balance, we show that the main purpose of mobile phone calls is to maintain continuing connections with family and friends. Our findings suggest that in iduals exert control over the extent to which calls invade their personal time, actively encouraging deeper contacts with intimates.
The Late Devonian Gogo Formation Lägerstatte of Western Australia: exceptional early vertebrate preservation and diversity
Publisher: Annual Reviews
Date: 04-2010
DOI: 10.1146/ANNUREV-EARTH-040809-152416
Abstract: The Gogo Formation of Western Australia preserves a unique Late Devonian (Frasnian) reef fauna. The exceptional three-dimensional preservation of macrofossils combined with unprecedented soft-tissue preservation (including muscle bundles, nerve cells, and umbilical structures) has yielded a particularly rich assemblage with almost 50 species of fishes described. The most significant discoveries have contributed to resolving placoderm phylogeny and elucidating their reproductive physiology. Specifically, these discoveries have produced data on the oldest known vertebrate embryos the anatomy of the primitive actinopterygian neurocranium and phylogeny of the earliest actinopterygians the histology, radiation, and plasticity of dipnoan (lungfish) dental and cranial structures the anatomy and functional morphology of the extinct onychodonts and the anatomy of the primitive tetrapodomorph head and pectoral fin.
Walking behaviours from the 1965–2003 American Heritage Time Use Study (AHTUS)
Publisher: Springer Science and Business Media LLC
Date: 2007
The dipnoan buccal pump reconstructed in 3D and implications for air breathing in Devonian lungfishes
Publisher: Cambridge University Press (CUP)
Date: 11-02-2016
DOI: 10.1017/PAB.2015.41
Abstract: Lungfishes are known for, and indeed take their name from, their bimodal respiratory abilities. All three extant genera can use their lungs to extract oxygen from the atmosphere, although their reliance upon this capability differs among taxa. Lungs are considered primitive for the Osteichthyes, however the distinctive buccal pump mode of air gulping exhibited by extant lungfishes appears to be a specialization. It is associated with a number of derived skeletal characters (cranial ribs, long parasphenoid stalk, midline gap between palatal tooth plates) that first appeared during the Devonian. These have been described in idually, but in no Devonian lungfish has their three-dimensional (3D) spatial relationship been reconstructed and analyzed. Here we present the 3D morphology of Rhinodipterus , a Mid-Late Devonian lungfish from Australia and Europe, based on synchrotron tomography and conventional microtomography scans. Unlike less crownward contemporaneous lungfishes such as Griphognathus and Chirodipterus , Rhinodipterus has a full set of skeletal buccal pump components that can be directly compared to those of extant lungfishes, suggesting that it made more extensive use of air breathing than other Gogo or Bergisch Gladbach genera. This is interesting in relation to the environmental context as Gogo and Bergisch Gladbach are both marine, contrasting with the frequently hypoxic tropical to subtropical fresh water environments inhabited by modern lungfishes. The evolution of buccal pump-supported lung ventilation was evidently not necessarily associated with a transition to non-marine habitats.
Cycles of nutrient trace elements in the Phanerozoic ocean
Publisher: Elsevier BV
Date: 12-2015
The structure of the sarcopterygian Onychodus jandemarrai n. sp. from Gogo, Western Australia: with a functional interpretation of the skeleton
Publisher: Cambridge University Press (CUP)
Date: 09-2005
DOI: 10.1017/S0263593300001309
Abstract: A description of the head, mandible, pectoral girdle, humerus, medial fins and their supports, and the dissociated vertebral column has been prepared for Onychodus jandemarrai n. sp. from the Gogo Formation (Frasnian) of Western Australia. This is the most completely known species of the genus. The feature influencing most of the head morphology is the retractable parasymphysial tusk whorls. Their presence has caused a reorganisation of the braincase, palate (including the loss of the vomers), and lateral displacement of the nasal capsules. The extensive mandibular articulation is in cartilage, and the mandibular symphysis is weak. This makes for a kinetic skull. There is a single submandibular on each side. The vertebral column is poorly ossified, consisting of intercentra which have no ventral contact, and pleurocentra. The neural arches have no longitudinal ligament, have unequal sides, and asymmetrical placing of the dorsal and ventral nerve root foramina. Each arch has an anterior surface that often attaches to the next anterior arch. The caudal fin is almost diphycercal all the medial fins have strong support structures. An attempt is made to discuss the functional morphology of many features of the skeleton.
Quantifying scientific significance of a fossil site: The Gogo fossil sites (Late Devonian, Western Australia) as a case study
Publisher: Museums Victoria
Date: 2016
Author Correction: Elpistostege and the origin of the vertebrate hand
Publisher: Springer Science and Business Media LLC
Date: 08-07-2020
Air-breathing adaptation in a marine Devonian lungfish
Publisher: The Royal Society
Date: 10-02-2010
Abstract: Recent discoveries of tetrapod trackways in 395 Myr old tidal zone deposits of Poland (Niedźwiedzki et al . 2010 Nature 463 , 43–48 ( doi:10.1038/nature.08623 )) indicate that vertebrates had already ventured out of the water and might already have developed some air-breathing capacity by the Middle Devonian. Air-breathing in lungfishes is not considered to be a shared specialization with tetrapods, but evolved independently. Air-breathing in lungfishes has been postulated as starting in Middle Devonian times ( ca 385 Ma) in freshwater habitats, based on a set of skeletal characters involved in air-breathing in extant lungfishes. New discoveries described herein of the lungfish Rhinodipterus from marine limestones of Australia identifies the node in dipnoan phylogeny where air-breathing begins, and confirms that lungfishes living in marine habitats had also developed specializations to breathe air by the start of the Late Devonian ( ca 375 Ma). While invasion of freshwater habitats from the marine realm was previously suggested to be the prime cause of aerial respiration developing in lungfishes, we believe that global decline in oxygen levels during the Middle Devonian combined with higher metabolic costs is a more likely driver of air-breathing ability, which developed in both marine and freshwater lungfishes and tetrapodomorph fishes such as Gogonasus .
A peculiar tetrapodomorph fish from the Middle Devonian of Australia supports Gondwana endemism in the stem tetrapod radiation (Abstract)
Publisher: Informa UK Limited
Date: 02-11-2012
A new genus of ptyctodont (Placodermi) from the Late Devonian of Baltic area
Publisher: Coquina Press
Date: 2019
DOI: 10.26879/890
Early Gnathostome Phylogeny Revisited: Multiple Method Consensus
Publisher: Public Library of Science (PLoS)
Date: 20-09-2016
A new selenosteid arthrodire ('Placodermi') from the Late devonian of Morocco
Publisher: Informa UK Limited
Date: 04-03-2015
First Shark from the Late Devonian (Frasnian) Gogo Formation, Western Australia Sheds New Light on the Development of Tessellated Calcified Cartilage (vol 10, e0126066, 2015)
Publisher: Public Library of Science (PLoS)
Date: 22-06-2015
Exploring the Economic and Social Value of Present Patterns of Volunteering in Australia
Publisher: Elsevier BV
Date: 2006
DOI: 10.2139/SSRN.1728569
Pelvic claspers confirm chondrichthyan-like internal fertilization in arthrodires
Publisher: Springer Science and Business Media LLC
Date: 13-07-2009
DOI: 10.1038/NATURE08176
Abstract: Recent finds demonstrate that internal fertilization and viviparity (live birth) were more widespread in the Placodermi, an extinct group of armoured fishes, than was previously realized. Placoderms represent the sister group of the crown group jawed vertebrates (Gnathostomata), making their mode(s) of reproduction potentially informative about primitive gnathostome conditions. An ossified pelvic fin basipterygium discovered in the arthrodire Incisoscutum ritchiei was hypothesized to be identical in males and females, with males presumed to have an additional cartilaginous element or series forming a clasper. Here we report the discovery of a completely ossified pelvic clasper in Incisoscutum ritchiei (WAM 03.3.28) which shows that this interpretation was incorrect: the basipterygium described previously is in fact unique to females. The male clasper is a slender rod attached to a square basal plate that articulates directly with the pelvis. It carries a small cap of dermal bone covered in denticles and small hooks that may be homologous with the much larger dermal component of the ptyctodont clasper.
The first jaws
Publisher: American Association for the Advancement of Science (AAAS)
Date: 20-10-2016
The cranial endocast of Dipnorhynchus sussmilchi (Sarcopterygii: Dipnoi) and the interrelationships of stem-group lungfishes
Publisher: PeerJ
Date: 20-10-2016
DOI: 10.7717/PEERJ.2539
Abstract: The first virtual cranial endocast of a lungfish from the Early Devonian, Dipnorhynchus sussmilchi , is described. Dipnorhynchus, only the fourth Devonian lungfish for which a near complete cranial endocast is known, is a key taxon for clarifying primitive character states within the group. A ventrally-expanded telencephalic cavity is present in the endocast of Dipnorhynchus demonstrating that this is the primitive state for “true” Dipnoi. Dipnorhynchus also possesses a utricular recess differentiated from the sacculolagenar pouch like that seen in stratigraphically younger lungfish ( Dipterus, Chirodipterus, Rhinodipterus ), but absent from the dipnomorph Youngolepis . We do not find separate pineal and para-pineal canals in contrast to a reconstruction from previous authors. We conduct the first phylogenetic analysis of Dipnoi based purely on endocast characters, which supports a basal placement of Dipnorhynchus within the dipnoan stem group, in agreement with recent analyses. Our analysis demonstrates the value of endocast characters for inferring phylogenetic relationships.
First Articulated Phyllolepid Placoderm from North America, with Comments on Phyllolepid Systematics
Publisher: Academy of Natural Sciences of Philadelphia
Date: 03-2013
DOI: 10.1635/053.162.0103
Pelvic and reproductive structures in placoderms (stem gnathostomes)
Publisher: Wiley
Date: 02-06-2015
DOI: 10.1111/BRV.12118
Abstract: Newly discovered pelvic and reproductive structures within placoderms, representing some of the most crownward members of the gnathostome stem group and the most basal jawed vertebrates, challenge established ideas on the origin of the pelvic girdle and reproductive complexity. Here we critically review previous descriptions of the pelvic structures in placoderms and reinterpret the morphology of the pelvic region within the arthrodires and ptyctodonts, in particular the position of the pelvic fin and the relationship of the male clasper to the pelvic girdle. Absence of clear articular surfaces on the clasper and girdle in the Arthrodira, along with evidence from the Ptyctodontida, suggest that these are separate structures along the body. We describe similarities between the pectoral and pelvic girdles and claspers, for ex le, all these have both dermal and perichondral (cartilaginous) components. Claspers in placoderms and chondrichthyans develop in very different ways in sharks, claspers develop from the pelvic fin while the claspers in placoderms develop separately, suggesting that their independent development involved a posterior extension of the 'competent stripes' for fin development previously limited to the region between the paired pectoral and pelvic fins. Within this expanded zone, we suggest that clasper position relative to the pelvic fins was determined by genes responsible for limb position. Information on early gnathostome reproductive processes is preserved in both the Ptyctodontida and Arthrodira, including the presence of multiple embryos in pregnant females, embryos of differing sizes and of different sexes (e.g. male claspers preserved in some embyros). By comparison with chondrichthyans, these observations suggest more complex reproductive strategies in placoderms than previously appreciated.
The Greatest Step in Vertebrate History: A Paleobiological Review of the Fish‐Tetrapod Transition
Publisher: University of Chicago Press
Date: 09-2004
DOI: 10.1086/425183
Abstract: Recent discoveries of previously unknown fossil forms have dramatically transformed understanding of many aspects of the fish-tetrapod transition. Newer paleobiological approaches have also contributed to changed views of which animals were involved and when, where, and how the transition occurred. This review summarizes major advances made and reevaluates alternative interpretations of important parts of the evidence. We begin with general issues and concepts, including limitations of the Paleozoic fossil record. We summarize important features of paleoclimates, paleoenvironments, paleobiogeography, and taphonomy. We then review the history of Devonian tetrapods and their closest stem group ancestors within the sarcopterygian fishes. It is now widely accepted that the first tetrapods arose from advanced tetrapodomorph stock (the elpistostegalids) in the Late Devonian, probably in Euramerica. However, truly terrestrial forms did not emerge until much later, in geographically far-flung regions, in the Lower Carboniferous. The complete transition occurred over about 25 million years definitive emergences onto land took place during the most recent 5 million years. The sequence of character acquisition during the transition can be seen as a five-step process involving: (1) higher osteichthyan (tetrapodomorph) ersification in the Middle Devonian (beginning about 380 million years ago [mya]), (2) the emergence of "prototetrapods" (e.g., Elginerpeton) in the Frasnian stage (about 372 mya), (3) the appearance of aquatic tetrapods (e.g., Acanthostega) sometime in the early to mid-Famennian (about 360 mya), (4) the appearance of "eutetrapods" (e.g., Tulerpeton) at the very end of the Devonian period (about 358 mya), and (5) the first truly terrestrial tetrapods (e.g., Pederpes) in the Lower Carboniferous (about 340 mya). We discuss each of these steps with respect to inferred functional utility of acquired character sets. Dissociated heterochrony is seen as the most likely process for the evolutionarily rapid morphological transformations required. Developmental biological processes, including paedomorphosis, played important roles. We conclude with a discussion of phylogenetic interpretations of the evidence.
Exit, Voice, and Suffering: Do Couples Adapt to Changing Employment Patterns?
Publisher: Wiley
Date: 08-2005
Exceptional preservation of organs in Devonian placoderms from the Gogo lagerstätte
Publisher: American Association for the Advancement of Science (AAAS)
Date: 16-09-2022
Abstract: The origin and early ersification of jawed vertebrates involved major changes to skeletal and soft anatomy. Skeletal transformations can be examined directly by studying fossil stem gnathostomes however, preservation of soft anatomy is rare. We describe the only known ex le of a three-dimensionally mineralized heart, thick-walled stomach, and bilobed liver from arthrodire placoderms, stem gnathostomes from the Late Devonian Gogo Formation in Western Australia. The application of synchrotron and neutron microtomography to this material shows evidence of a flat S-shaped heart, which is well separated from the liver and other abdominal organs, and the absence of lungs. Arthrodires thus show the earliest phylogenetic evidence for repositioning of the gnathostome heart associated with the evolution of the complex neck region in jawed vertebrates.
Late devonian chondrichthyans and other microvertebrate remains from Northern Thailand
Publisher: Informa UK Limited
Date: 29-03-1990
First acanthodian from the Upper Devonian (Frasnian) Gogo Formation, Western Australia
Publisher: Informa UK Limited
Date: 08-2012
NEW MORPHOLOGICAL INFORMATION ON THE PTYCTODONTID FISHES (PLACODERMI, PTYCTODONTIDA) FROM WESTERN AUSTRALIA
Publisher: Informa UK Limited
Date: 26-06-2012
Devonian arthrodire embryos and the origin of internal fertilization in vertebrates
Publisher: Springer Science and Business Media LLC
Date: 02-2009
DOI: 10.1038/NATURE07732
Abstract: Evidence of reproductive biology is extremely rare in the fossil record. Recently the first known embryos were discovered within the Placodermi, an extinct class of armoured fish, indicating a viviparous mode of reproduction in a vertebrate group outside the crown-group Gnathostomata (Chondrichthyes and Osteichthyes). These embryos were found in ptyctodontids, a small group of placoderms phylogenetically basal to the largest group, the Arthrodira. Here we report the discovery of embryos in the Arthrodira inside specimens of Incisoscutum ritchiei from the Upper Devonian Gogo Formation of Western Australia (approximately 380 million years ago), providing the first evidence, to our knowledge, for reproduction using internal fertilization in this erse group. We show that Incisoscutum and some phyllolepid arthrodires possessed pelvic girdles with long basipterygia that articulated distally with an additional cartilaginous element or series, as in chondrichthyans, indicating that the pelvic fin was used in copulation. As homology between similar pelvic girdle skeletal structures in ptyctodontids, arthrodires and chondrichthyans is difficult to reconcile in the light of current phylogenies of lower gnathostomes, we explain these similarities as being most likely due to convergence (homoplasy). These new finds confirm that reproduction by internal fertilization and viviparity was much more widespread in the earliest gnathostomes than had been previously appreciated.
A new method for reconstructing brain morphology: applying the brain-neurocranial spatial relationship in an extant lungfish to a fossil endocast
Publisher: The Royal Society
Date: 07-2016
DOI: 10.1098/RSOS.160307
Abstract: Lungfish first appeared in the geological record over 410 million years ago and are the closest living group of fish to the tetrapods. Palaeoneurological investigations into the group show that unlike numerous other fishes—but more similar to those in tetrapods—lungfish appear to have had a close fit between the brain and the cranial cavity that housed it. As such, researchers can use the endocast of fossil taxa (an internal cast of the cranial cavity) both as a source of morphological data but also to aid in developing functional and phylogenetic implications about the group. Using fossil endocast data from a three-dimensional-preserved Late Devonian lungfish from the Gogo Formation, Rhinodipterus , and the brain-neurocranial relationship in the extant Australian lungfish, Neoceratodus , we herein present the first virtually reconstructed brain of a fossil lungfish. Computed tomographic data and a newly developed ‘brain-warping’ method are used in conjunction with our own distance map software tool to both analyse and present the data. The brain reconstruction is adequate, but we envisage that its accuracy and wider application in other taxonomic groups will grow with increasing availability of tomographic datasets.
A new bothriolepid antiarch (Pisces, Placodermi) from the Devonian of Dô Son peninsula, northern Vietnam
Publisher: Informa UK Limited
Date: 1990
A new basal actinopterygian fish from the Middle Devonian Aztec Siltstone of Antarctica
Publisher: Cambridge University Press (CUP)
Date: 27-03-2008
DOI: 10.1017/S0954102008001144
Abstract: A new basal actinopterygian fish, Donnrosenia schaefferi gen. et sp. nov., is described from the Middle Devonian (Givetian) Aztec Siltstone of southern Victoria Land, Antarctica. Donnrosenia gen. nov. is characterized by the large parietals which are of almost equivalent size to the frontals, very small intertemporals, a small accessory operculum situated dorsally to the prominent anterodorsal process of the suboperculum, a deep dentary with anterior flexure, porous ornamentation on the clavicle, an elongate body form with macromeric squamation, an absence of paired fringing fulcra on the fins, and pectoral lepidotrichia which are unsegmented for much of their length. A phylogenetic analysis based on dermal skeletal features of Devonian actinopterygians indicates that Donnrosenia gen. nov. is the sister taxon to Howqualepis from the Middle Devonian of Victoria, Australia, and is embedded within a possible clade containing the actinopterygians from the Gogo Formation, Western Australia. This supports the concept of an endemic radiation of East Gondwanan actinopterygians, and reinforces the already strong biogeographical similarities between the Middle Devonian palaeofaunas of Australia and Antarctica.
New insights into the origins and radiation of the mid-Palaeozoic Gondwanan stem tetrapods
Publisher: Cambridge University Press (CUP)
Date: 03-2018
DOI: 10.1017/S1755691018000750
Abstract: The earliest tetrapodomorph fishes appear in Chinese deposits of Early Devonian age, and by the Middle Devonian they were widespread globally. Evidence for the earliest digitated tetrapods comes from largely uncontested Middle Devonian trackways and Late Devonian body fossils. The East Gondwana Provence (Australasia, Antarctica) fills vital gaps in the phylogenetic and biogeographic history of the tetrapods, with the Gondwanan clade Canowindididae exhibiting a high degree of endemism within the early part of the stem tetrapod radiation. New anatomical details of Koharalepis , from the Middle Devonian Aztec Siltstone of Antarctica, are elucidated from synchrotron scan data. These include the position of the orbit, the condition of the hyomandibular, the shape of the palate and arrangement of the vomerine fangs. Biogeographical and phylogenetic models of stem tetrapod origins and radiations are discussed.
Taxonomic revision of buchanosteioid placoderms (Arthrodira) from the Early Devonian of south-eastern Australia and Arctic Russia
Publisher: CSIRO Publishing
Date: 2014
DOI: 10.1071/ZO13081
Abstract: The ‘buchanosteid’ placoderms are best known from the Early Devonian of Australia, but also occur in China, Russia, Central Asia and the Middle East. Here we rediagnose the type species Buchanosteus confertituberculatus (Hills 1936) from the type locality at Buchan, Victoria, in the light of new material of both head and trunk shields. The superfamily Buchanosteoidea Denison, 1978 is redefined to unite taxa that share a similar skull roof with separate rostro-pineal (ethmoid) bone, and postethmoid skull pattern characterised by a large trapezoidal nuchal, strap-like short and broad preorbitals, large subrectangular centrals, small postorbitals not contacting the paranuchals, and large, elongate marginal plates. The Family Buchanosteidae is redefined on skull roof and parasphenoid shape and trunk armour features as a monotypic family within the Buchanosteoidea. A new family (Parabuchanosteidae nov.) includes taxa with the posterior lateral plate overlapping the anterior dorsolateral plate externally. Two new buchanosteids are described, Richardosteus barwickorum gen. et sp. nov., from Burrinjuck, south-eastern Australia, and Urvaspis lithuanica gen. et sp. nov., from Severnaya Zemlya, Russia.
A Devonian fish fauna from subsurface sediments in the eastern Officer Basin, South Australia
Publisher: Informa UK Limited
Date: 1988
Fish from the Upper Devonian of the Shan-Thai terrane indicate proximity to east Gondwana and south China terranes
Publisher: Geological Society of America
Date: 1989
Reviews : Boris Frankel, The Post-Industrial Utopians Polity, 1987
Publisher: SAGE Publications
Date: 05-1987
Persistence and Change in the Family and Gender in Australian Society
Publisher: Palgrave Macmillan UK
Date: 1989
The Time-Pressure Illusion: Discretionary Time vs. Free Time
Publisher: Springer Science and Business Media LLC
Date: 08-2005
Morphometric analysis of lungfish endocasts elucidates early dipnoan palaeoneurological evolution
Publisher: eLife Sciences Publications, Ltd
Date: 12-07-2022
DOI: 10.7554/ELIFE.73461
Abstract: The lobe-finned fish, lungfish (Dipnoi, Sarcoptergii), have persisted for ~400 million years from the Devonian Period to present day. The evolution of their dermal skull and dentition is relatively well understood, but this is not the case for the central nervous system. While the brain has poor preservation potential and is not currently known in any fossil lungfish, substantial indirect information about it and associated structures (e.g. labyrinths) can be obtained from the cranial endocast. However, before the recent development of X-ray tomography as a palaeontological tool, these endocasts could not be studied non-destructively, and few detailed studies were undertaken. Here, we describe and illustrate the endocasts of six Palaeozoic lungfish from tomographic scans. We combine these with six previously described digital lungfish endocasts (4 fossil and 2 recent taxa) into a 12-taxon dataset for multivariate morphometric analysis using 17 variables. We find that the olfactory region is more highly plastic than the hindbrain, and undergoes significant elongation in several taxa. Further, while the semicircular canals covary as an integrated module, the utriculus and sacculus vary independently of each other. Functional interpretation suggests that olfaction has remained a dominant sense throughout lungfish evolution, and changes in the labyrinth may potentially reflect a change from nektonic to near-shore environmental niches. Phylogenetic implications show that endocranial form fails to support monophyly of the ‘chirodipterids’. Those with elongated crania similarly fail to form a distinct clade, suggesting these two paraphyletic groups have converged towards either head elongation or truncation driven by non-phylogenetic constraints.
II) Goodin et al.’s New Measure of Freedom: Authors Meet Critic
Publisher: Springer Science and Business Media LLC
Date: 06-08-2010
New ischnacanthid acanthodians from the Early Devonian of Australia, with comments on acanthodian interrelationships
Publisher: Oxford University Press (OUP)
Date: 08-1986
Devonian (Emsian-Eifelian) fish from the Lower Bokkeveld Group (Ceres Subgroup), South Africa
Publisher: Elsevier BV
Date: 07-1999
Author response: Morphometric analysis of lungfish endocasts elucidates early dipnoan palaeoneurological evolution
Publisher: eLife Sciences Publications, Ltd
Date: 14-06-2022
Getting to the heart of a good fossil
Publisher: eLife Sciences Publications, Ltd
Date: 19-04-2016
DOI: 10.7554/ELIFE.16207
Abstract: The discovery of perfectly preserved 113-119 million year old fossilised hearts in a Brazilian fish Rhacolepis has significant implications for palaeontology and comparative anatomy.
Television Viewing by School-Age Children: Associations with Physical Activity, Snack Food Consumption and Unhealthy Weight
Publisher: Springer Science and Business Media LLC
Date: 04-08-2010
Electroreception in early vertebrates: survey, evidence and new information
Publisher: Wiley
Date: 11-02-2018
DOI: 10.1111/PALA.12346
NEW ONYCHODONTIFORM (OSTEICHTHYES; SARCOPTERYGII) FROM THE LOWER DEVONIAN OF VICTORIA, AUSTRALIA
Publisher: Cambridge University Press (CUP)
Date: 09-2007
DOI: 10.1666/PLEO05-023.1
Appliances and their impact: the ownership of domestic technology and time spent on household work
Publisher: Wiley
Date: 09-2004
Dawn deed
Publisher: Springer Science and Business Media LLC
Date: 2011
Fossil Vertebrates: Fish
Publisher: Elsevier
Date: 2005
New placoderm fishes from the late devonian of south africa
Publisher: Informa UK Limited
Date: 19-06-1997
Trace element content of sedimentary pyrite as a new proxy for deep-time ocean–atmosphere evolution
Publisher: Elsevier BV
Date: 03-2014
A new species ofBarameda(Rhizodontida) and heterochrony in the rhizodontid pectoral fin
Publisher: Informa UK Limited
Date: 12-06-2007
A new genus and species of basal actinopterygian fish from the Upper Devonian Gogo Formation of Western Australia
Publisher: Wiley
Date: 05-2009
Exceptional preservation of nerve and muscle tissues in Late Devonian placoderm fish and their evolutionary implications
Publisher: The Royal Society
Date: 06-02-2007
Abstract: In this paper, we show exceptional three-dimensionally preserved fossilized muscle tissues in 380–384 Myr old placoderm fish (Late Devonian), offering new morphological evidence supporting the hypothesis that placoderms are the sister group to all other gnathostomes. We describe the oldest soft tissue discovered in gnathostomes, which includes striated muscle fibres, circulatory and nerve tissues, preserved as phosphatized structures precipitated by microbial infilling of small, protected areas under the headshield of the arthrodire, Eastmanosteus calliaspis . Muscle impressions have also been found in the ptyctodontid, Austroptyctodus gardineri . The specimens display primitive vertebrate muscle structures in particular, shallow W-shaped muscle blocks such as those observed in l reys. New information from fossilized soft tissues thus elucidates the affinities of the placoderms and provides new insights into the evolution and radiation of gnathostomes.
Devonian placoderm embryos and the origins of vertebrate sex (Abstract)
Publisher: Informa UK Limited
Date: 12-09-2008
T he L and of the L ost L ong W eekend ? T rends in F ree T ime among W orking A ge A ustralians , 1974–1992
Publisher: Informa UK Limited
Date: 1998
Valuing Time: A Conference Overview
Publisher: Springer Science and Business Media LLC
Date: 23-07-2010
Fish-bearing aztec siltstone (devonian) in the cook mountains, Antarctica
Publisher: Informa UK Limited
Date: 07-1990
Sunday Working and Family Time
Publisher: Informa UK Limited
Date: 08-2005
The Woodward factor: Arthur Smith Woodward's legacy to geology in Australia and Antarctica
Publisher: Geological Society of London
Date: 28-10-2015
DOI: 10.1144/SP430.15
Now it's 2000: Trends in doing and being in the new millennium
Publisher: Informa UK Limited
Date: 11-2000
A new rhizodontiform fish from the Early Carboniferous of Victoria, Australia, with remarks on the phylogenetic position of the group
Publisher: Informa UK Limited
Date: 30-03-1989
A new camuropiscid arthrodire (Pisces: Placodermi) from Gogo, Western Australia
Publisher: Oxford University Press (OUP)
Date: 11-1988
Time demands of caring for children with cerebral palsy: what are the implications for maternal mental health?
Publisher: Wiley
Date: 14-01-2011
DOI: 10.1111/J.1469-8749.2010.03848.X
Abstract: To examine the relationship between maternal mental health problems and the time required by mothers to care for children with cerebral palsy (CP). Cross-sectional study of 158 mothers of children with cerebral palsy (98 males, 60 females mean age 11y 3mo, range 6-17y). Gross Motor Function Classification System levels of the children were 37% level I, 20% level II, 9% level III, 12% level IV, and 22% level V. Manual Ability Classification System levels were 19% level I, 27% level II, 22% level III, 13% level IV, and 19% level V. Maternal mental health problems were assessed using the General Health Questionnaire. Depressive symptoms were assessed using the Center for Epidemiological Studies Depression Scale. A time-diary was used to measure caregiving time. Experience of time pressure was assessed using the Time Crunch Scale. On average, mothers spent 6.0 hours per 24 hours on weekdays and 8.3 hours per 24 hours on weekends caring for children with CP. There was a significant positive relationship between maternal psychological problems and both caregiving time required per 24 hours (p = 0.03) and mothers' experience of time pressure (p < 0.001). There was also a significant positive association between maternal depressive symptoms and experience of time pressure (p = 0.003). It is important to support mothers to find ways of reducing the real and perceived impact of caregiving. This might include identifying sources of 'respite' support for caregivers, training in stress and time management, and appropriate treatment of mental health problems.
On the relationships ofPsarolepisand the onychodontiform fishes
Publisher: Informa UK Limited
Date: 14-12-2001
Evolution, missing links and climate change: Recent advances in understanding transformational macroevolution
Publisher: Cambridge University Press
Date: 10-11-2011
Contemporary contestations over working time: Time for health to weigh in
Publisher: Springer Science and Business Media LLC
Date: 13-10-2014
The Bothriolepis (Placodermi, Antiarcha) material from the Valentia Slate Formation of the Iveragh Peninsula (middle Givetian, Ireland): Morphology, evolutionary and systematic considerations, phyloge
Publisher: Public Library of Science (PLoS)
Date: 23-02-2023
DOI: 10.1371/JOURNAL.PONE.0280208
Abstract: Material of the antiarch placoderm Bothriolepis from the middle Givetian of the Valentia Slate Formation in Iveragh Peninsula, Ireland, is described and attributed to a new species, B . dairbhrensis sp. nov. A revision of the genus Bothriolepis is proposed, and its taxonomic content and previous phylogenetic analyses are reviewed, as well as the validity of morphologic characteristics considered important for the establishment of the genus, such as the shape of the preorbital recess of the neurocranium. A series of computerised phylogenetic analyses was performed, which reveals that our new species is the sister taxon to the Frasnian Scottish form B . gigantea . New phylogenetic and biogeographic analyses of the genus Bothriolepis together with comparisons between faunal assemblages reveal a first northward dispersal wave from Gondwana to Euramerica at the latest in the mid Givetian. Other Euramerican species of Bothriolepis seem to belong to later dispersal waves from Gondwana, non-excluding southward waves from Euramerica. Questions remain open such as the taxonomic validity and stratigraphic constraints for the most ancient forms of Bothriolepis in China, and around the highly speciose nature of the genus.
Devonian macrovertebrate assemblages and biogeography of East Gondwana (Australia, Antarctica)
Publisher: Elsevier BV
Date: 03-2010
Michael Bittman and Jocelyn Pixley, The Double Life of the Family: Myth, Hope and Experience, St. Leonards, NSW: Allen and Unwin, 1997, paper A$32.95, xiv + 313pp.
Publisher: Cambridge University Press (CUP)
Date: 09-1998
The structure and relationships of a new osteolepiform fish from the late devonian of Victoria, Australia
Publisher: Informa UK Limited
Date: 1985
Cross-sectional sleep thresholds for optimal health and well-being in Australian 4-9-year-olds.
Publisher: Elsevier BV
Date: 06-2015
DOI: 10.1016/J.SLEEP.2015.08.013
Abstract: Using national Australian time-diary data, we aimed to empirically determine sleep duration thresholds beyond which children have poorer health, learning, quality of life, and weight status and parents have poorer mental health. Cross-sectional data from the first three waves of the Longitudinal Study of Australian Children. A nationally representative s le of 4983 4-5-year-olds, recruited in 2004 from the Australian Medicare database and followed biennially 3631 had analyzable sleep information and a concurrent measure of health and well-being for at least one wave. At each wave, a parent completed 24-h time-use diaries for one randomly selected weekday and one weekend day, including a "sleeping/napping" category. Parent-reported child mental health, health-related quality of life, and maternal aternal mental health teacher-reported child language, literacy, mathematical thinking, and approach to learning and assessed child body mass index and girth. Linear regression analyses revealed weak, inconsistent relationships between sleep duration and outcomes at every wave. For ex le, children with versus without psychosocial health-related quality of life problems slept slightly less at 6-7 years (adjusted mean difference 0.12 h 95% confidence interval 0.01-0.22, p = 0.03), but not at 4-5 (0.00 -0.10 to 0.11, p = 1.0) or 8-9 years (0.09 -0.02 to 0.22, p = 0.1). Empirical exploration using fractional polynomials demonstrated no clear thresholds for sleep duration and any adverse outcome at any wave. Present guidelines in terms of children's short sleep duration appear misguided. Other parameters such as sleep timing may be more meaningful for understanding optimal child sleep.
Social Participation and Family Welfare: The Money and Time Costs of Leisure in Australia
Publisher: Wiley
Date: 08-2002
The Cell Phone, Constant Connection and Time Scarcity in Australia
Publisher: Springer Science and Business Media LLC
Date: 16-01-2009
Lower Devonian microvertebrates from the Point Hibbs Formation, Tasmania
Publisher: Informa UK Limited
Date: 1998
Screen Media, Parenting Practices, and the Family Environment in Australia: A Longitudinal Study of Young Children's Media Use, Lifestyles, and Outcomes for Healthy Weight
Publisher: Informa UK Limited
Date: 02-01-2015
Program and Abstracts
Publisher: Informa UK Limited
Date: 10-2010
A new Late Devonian acanthodian fish from the Hunter Formation near Grenfell, New South Wales
Publisher: Informa UK Limited
Date: 2004
When Does Gender Trump Money? Bargaining and Time in Household Work1
Publisher: University of Chicago Press
Date: 07-2003
DOI: 10.1086/378341
Author response: Neurocranial anatomy of an enigmatic Early Devonian fish sheds light on early osteichthyan evolution
Publisher: eLife Sciences Publications, Ltd
Date: 18-04-2018
Morphometric Analysis of Lungfish Endocasts Elucidates Early Dipnoan Palaeoneurological Evolution
Publisher: Cold Spring Harbor Laboratory
Date: 15-09-2021
DOI: 10.1101/2021.09.13.460037
Abstract: Lungfish (Dipnoi) are lobe-finned fish (Sarcopterygii) that have persisted for over 400 million years from the Devonian Period to present day. They are the extant sister group to tetrapods and thus have the ability to provide unique insight into the condition of the earliest tetrapods as well as their own evolutionary history. The evolution of their dermal skull and dentition is relatively well understood, but this is not the case for the central nervous system. While the brain itself has very poor preservation potential and is not currently known in any fossil lungfish, substantial indirect information about it and associated structures such as the inner ears can be obtained from the cranial endocast. However, before the recent development of X-ray tomography as a palaeontological tool, these endocasts could not be studied non-destructively, and few detailed studies were undertaken. Here we describe and illustrate the endocasts of six Palaeozoic lungfishes ( Iowadipterus halli, Gogodipterus paddyensis, Pillararhynchus longi, Griphognathus whitei, Orlovichthys limnatis , and Rhinodipterus ulrichi ) from tomographic scans. We combine these with six previously described lungfish endocasts (4 fossil and 2 recent taxa), also based on tomographic studies, into a 12-taxon data set for multivariate morphometric analysis using 17 variables. We find that the olfactory region appears to be more highly plastic than the hindbrain, and undergoes significant elongation in several taxa. Further, while the semicircular canals covary as an integrated module, the utriculus and sacculus of the inner ear instead vary independently of each other. The functional and phylogenetic implications of our findings are discussed.
Why Australasian vertebrate animals are so unique – A palaeontological perspective
Publisher: Elsevier BV
Date: 04-2017
DOI: 10.1016/J.YGCEN.2016.06.002
Abstract: Australasia has a unique fauna of living vertebrates, which include the oldest known species on the planet (the lungfish Neoceratodus) as well as many erse, highly endemic families of fish, hibians, reptiles, birds and mammals. The origin of most of the Australian vertebrate fauna has developed from two phases. Firstly, when Australia was subsumed within the greater Gondwana landmass, migration of animals from one region to another was possible by a land connection. Many of our most primitive forms of reptiles and mammals probably entered the country at this time, such as varanids, madtsooid snakes, monotremes and basal marsupials. Secondly, following the breakup of Gondwana, the isolation of Australia for its last 40 million years and subsequent changing climatic conditions drove the radiation of marsupial, reptile and hibian families within the continent. The gradual aridification of central Australia further ided the landmass into discrete regional areas characterised by rainfall, vegetation, and climatic zones.
New records of Devonian plants from southern Victoria Land, Antarctica
Publisher: Cambridge University Press (CUP)
Date: 1994
DOI: 10.1017/S0016756800010517
Abstract: An assemblage of fossil plants is here recorded from the Middle Devonian Beacon Heights Orthoquartzite and overlying Aztec Siltstone (Taylor Group), of the Cook Mountains and Skelton Névé regions, southern Victoria Land, Antarctica. The Beacon Heights Orthoquartzite exposed in the southern Cook Mountains yielded specimens of the lycopods Haplostigma lineare, Malanzania sp., and Archaeosigillaria sp. cf. A. caespitosa . The Aztec Siltstone flora contains Praeramunculus alternatiramus and H. lineare .
A review of Australian mosasaur occurrences
Publisher: Cambridge University Press (CUP)
Date: 09-2005
DOI: 10.1017/S0016774600021089
Abstract: Mosasaurs are rare in Australia with fragmentary specimens known only from the Cenomanian-lower Turonian Molecap Greensand (Perth Basin), C anian - lower Maastrichtian Korojon Calcarenite (Carnarvon Basin), and upper Maastrichtian Miria Formation (Carnarvon Basin), Western Australia. These units were laid down during a near-continuous marine inundation of the western margin of the Australian landmass (which followed separation from India in the Valanginian and genesis of the Indian Ocean) in the Early-Late Cretaceous. The Australian mosasaur record incorporates evidence of derived mosasaurids (mainly plioplatecarpines) however, as yet no specimen can be conclusively diagnosed to genus or species level. The fragmentary nature of the remains provides little basis for direct palaeobiogeographic comparisons. However, correlation with existing data on associated vertebrates, macroinvertebrates and microfossils suggests that the Western Australian mosasaur fauna might have been transitional in nature (particularly following palaeobiogeographic separation of the northern and southern Indian Oceans during the mid-C anian), potentially sharing elements with both northern Tethyan and austral high-latitude regions.
Domestic Power: Negotiating an Unequal Division of Labour within a Framework of Equality
Publisher: SAGE Publications
Date: 12-1993
The Nuclear Family and Its Future
Publisher: Macmillan Education UK
Date: 1993
New arthrodires (placoderm fishes) from the Aztec Siltstone (late Middle Devonian) of southern Victoria Land, Antarctica
Publisher: CSIRO Publishing
Date: 2014
DOI: 10.1071/ZO13070
Abstract: A small collection of arthrodire remains is described from the Devonian Aztec Siltstone of southern Victoria Land, Antarctica. Barwickosteus antarcticus, gen. et sp. nov., is a small phlyctaeniid arthrodire probably closely related to Barrydalaspis from the Bokkeveld Group of South Africa. Grifftaylor antarcticus, gen. et sp. nov., is a generalised phlyctaeniid resembling Phlyctaenius and Neophlyctaenius. New specimens of Boomeraspis show that it had a high-spired trunk-armour with a median dorsal plate of similar proportions to Tiaraspis, Mithakaspis, Turrisaspis or Africanaspis. Other fragmentary median dorsal plates are provisionally referred to Turrisaspis and Mulgaspis. With these new taxa the vertebrate assemblage from the Aztec Siltstone comprises at least 37 genera and 50 species, making it one of the most erse of Middle–Late Devonian age.
Men's Welfare State, Women's Welfare State: Tendencies to Convergence in Practice and Theory?
Publisher: SAGE Publications Ltd
Date: 1994
Book Reviews
Publisher: SAGE Publications
Date: 05-1991
Phyllolepid placoderm fish remains from the Devonian Aztec Siltstone, southern Victoria Land, Antarctica
Publisher: Cambridge University Press (CUP)
Date: 17-08-2005
DOI: 10.1017/S095410200500283X
Abstract: Phyllolepid placoderm remains from the Aztec Siltstone fish fauna are described as Austrophyllolepis quiltyi sp. nov., Austrophyllolepis cf. A. youngi, Placolepis tingeyi sp. nov., and phyllolepid indet. The new Antarctic species of two genera previously only known from Australia reinforce evidence from other fish taxa of close biogeographic affinity, as part of the eastern margin of Palaeozoic Gondwana. At least three genera and four species gives the Aztec Siltstone fish fauna the most erse phyllolepid assemblage known, and probably the oldest documented so far (?late Middle Devonian). Specimens of Austrophyllolepis from the type locality at Mount Howitt, Victoria, are refigured for comparison with the Antarctic species. The order Phyllolepida is a key group for understanding Devonian vertebrate biogeography and palaeogeography, with a unique disjunct distribution in both time and space between the Southern and Northern hemispheres. Phyllolepids document one of the major dispersal events in early vertebrate history, which approximately coincided with the Frasnian–Famennian boundary mass extinction during the Late Devonian.
The mobile phone, perpetual contact and time pressure
Publisher: SAGE Publications
Date: 12-2009
Abstract: Mobile phone services are now universally diffused, creating the possibility of perpetual contact, regardless of time and location. Many think the impossibility of being ‘out of touch’ leads to increased time pressure. In addition to claims that the mobile phone has led to harried leisure, others have argued that perpetual contact extends work into the home or intensifies work in other ways. In this article, these issues are explored using survey data employing some novel methodologies — combining a questionnaire with logs of phone traffic recovered from respondents’ handsets and a purpose-designed time-diary of technology use. Overall, results show that mobile phone use is not associated with more harried leisure. Fears of work intruding into home life appear to be exaggerated. However, there is some evidence that frequent use of mobiles during working hours is associated with work intensification, at least among men.
Time Demands of Caring for Children with Autism: What are the Implications for Maternal Mental Health?
Publisher: Springer Science and Business Media LLC
Date: 12-2009
Xeradipterus hatcheri, a new dipnoan from the Late Devonian (Frasnian) Gogo Formation, Western Australia, and other new holodontid material
Publisher: Informa UK Limited
Date: 18-05-2010
The earliest known stem-tetrapod from the Lower Devonian of China
Publisher: Springer Science and Business Media LLC
Date: 23-10-2012
DOI: 10.1038/NCOMMS2170
Abstract: Recent discoveries of advanced fish-like stem-tetrapods (for ex le, Panderichthys and Tiktaalik) have greatly improved our knowledge of the fin-to-limb transition. However, a paucity of fossil data from primitive finned tetrapods prevents profound understanding of the acquisition sequence of tetrapod characters. Here we report a new stem-tetrapod (Tungsenia paradoxa gen. et sp. nov.) from the Lower Devonian (Pragian, ∼409 million years ago) of China, which extends the earliest record of tetrapods by some 10 million years. Sharing many primitive features with stem-lungfishes, the new taxon further fills in the morphological gap between tetrapods and lungfishes. The X-ray tomography study of the skull depicts the plesiomorphic condition of the brain in the tetrapods. The enlargement of the cerebral hemispheres and the possible presence of the pars tuberalis in this stem-tetrapod indicate that some important brain modifications related to terrestrial life had occurred at the beginning of the tetrapod evolution, much earlier than previously thought.
A new dipnoan genus, Ichnomylax, from the Lower Devonian of Victoria, Australia
Publisher: Informa UK Limited
Date: 31-03-1994
Program and Abstracts
Publisher: Informa UK Limited
Date: 02-11-2011
Response to comment on “Exceptional preservation of organs in Devonian placoderms from the Gogo largerstätte”
Publisher: American Association for the Advancement of Science (AAAS)
Date: 12-05-2023
Abstract: Jensen et al . ( 1 ) question evidence presented of a chambered heart within placoderms, citing its small size and apparently ventral atrium. However, they fail to note the belly-up orientation of the placoderm within one nodule, and the variability of heart morphology within extant taxa. Thus, we remain confident in our interpretation of the mineralized organ as the heart.
A second incisoscutid arthrodire (Pisces, Placodermi) from the Late Devonian Gogo Formation, Western Australia
Publisher: Informa UK Limited
Date: 1994
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Natural History Museum Of Los Angeles County
Location: United States of America
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