ORCID Profile
0000-0003-0567-5210
Current Organisation
The University of Edinburgh
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Publisher: Cold Spring Harbor Laboratory
Date: 15-09-2023
Publisher: Pensoft Publishers
Date: 22-08-2022
DOI: 10.3897/PHYTOKEYS.205.85866
Abstract: Subfamily Caesalpinioideae with ca. 4,600 species in 152 genera is the second-largest subfamily of legumes (Leguminosae) and forms an ecologically and economically important group of trees, shrubs and lianas with a pantropical distribution. Despite major advances in the last few decades towards aligning genera with clades across Caesalpinioideae, generic delimitation remains in a state of considerable flux, especially across the mimosoid clade. We test the monophyly of genera across Caesalpinioideae via phylogenomic analysis of 997 nuclear genes sequenced via targeted enrichment (Hybseq) for 420 species and 147 of the 152 genera currently recognised in the subfamily. We show that 22 genera are non-monophyletic or nested in other genera and that non-monophyly is concentrated in the mimosoid clade where ca. 25% of the 90 genera are found to be non-monophyletic. We suggest two main reasons for this pervasive generic non-monophyly: (i) extensive morphological homoplasy that we document here for a handful of important traits and, particularly, the repeated evolution of distinctive fruit types that were historically emphasised in delimiting genera and (ii) this is an artefact of the lack of pantropical taxonomic syntheses and s ling in previous phylogenies and the consequent failure to identify clades that span the Old World and New World or conversely hi-Atlantic genera that are non-monophyletic, both of which are critical for delimiting genera across this large pantropical clade. Finally, we discuss taxon delimitation in the phylogenomic era and especially how assessing patterns of gene tree conflict can provide additional insights into generic delimitation. This new phylogenomic framework provides the foundations for a series of papers reclassifying genera that are presented here in Advances in Legume Systematics (ALS) 14 Part 1, for establishing a new higher-level phylogenetic tribal and clade-based classification of Caesalpinioideae that is the focus of ALS14 Part 2 and for downstream analyses of evolutionary ersification and biogeography of this important group of legumes which are presented elsewhere.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 17-02-2023
Abstract: Early natural historians—Comte de Buffon, von Humboldt, and De Candolle—established environment and geography as two principal axes determining the distribution of groups of organisms, laying the foundations for biogeography over the subsequent 200 years, yet the relative importance of these two axes remains unresolved. Leveraging phylogenomic and global species distribution data for Mimosoid legumes, a pantropical plant clade of c. 3500 species, we show that the water availability gradient from deserts to rain forests dictates turnover of lineages within continents across the tropics. We demonstrate that 95% of speciation occurs within a precipitation niche, showing profound phylogenetic niche conservatism, and that lineage turnover boundaries coincide with isohyets of precipitation. We reveal similar patterns on different continents, implying that evolution and dispersal follow universal processes.
Publisher: Pensoft Publishers
Date: 22-08-2022
DOI: 10.3897/PHYTOKEYS.205.76790
Abstract: Recent phylogenomic analyses of 997 nuclear genes support the long-held view that the genus Entada is congeneric with Elephantorrhiza . Entada is resolved as monophyletic only if the genus Elephantorrhiza is subsumed within it. The two genera were distinguished solely by relatively minor differences in the mode of dehiscence of the fruits (a craspedium separating into one-seeded endocarp segments in Entada versus a craspedium with the whole fruit valve breaking away from the persistent replum in Elephantorrhiza ) and the craspedial fruit type itself provides a shared synapomorphy for the re-circumscribed Entada . Here, we provide a synopsis of Entada , including 11 new combinations in total, for the eight species, one subspecies and one variety previously placed in Elephantorrhiza , as well as a new combination for a subspecies of Entada rheedei Spreng. not previously dealt with when Entada pursaetha DC. was placed in synonymy. These new combinations are: Entada burkei (Benth.) S.A. O’Donnell & G.P. Lewis, comb. nov. Entada elephantina (Burch.) S.A. O’Donnell & G.P. Lewis, comb. nov. Entada goetzei (Harms) S.A. O’Donnell & G.P. Lewis, comb. nov. Entada goetzei subsp. lata (Brenan & Brummitt) S.A. O’Donnell & G.P. Lewis, comb. nov. Entada obliqua (Burtt Davy) S.A. O’Donnell & G.P. Lewis, comb. nov. Entada praetermissa (J.H. Ross) S.A. O’Donnell & G.P. Lewis, comb. nov. Entada rangei (Harms) S.A. O’Donnell & G.P. Lewis, comb. nov. Entada rheedei subsp. sinohimalensis (Grierson & D.G. Long) S.A. O’Donnell & G.P. Lewis, comb. nov. Entada schinziana (Dinter) S.A. O’Donnell & G.P. Lewis, comb. nov. Entada woodii (E. Phillips) S.A. O’Donnell & G.P. Lewis, comb. nov. and Entada woodii var. pubescens (E. Phillips) S.A. O’Donnell & G.P. Lewis, comb. nov. We provide a revised circumscription of the genus Entada which now comprises 40 species distributed pantropically, with the greatest ersity of species in tropical Africa. We present a complete taxonomic synopsis, including a map showing the global distribution of the genus and photographs showing variation amongst species in habit, foliage, flowers and fruits. A short discussion about extrafloral nectaries, mainly observed in the Madagascan species, is presented.
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Jens Ringelberg.