ORCID Profile
0000-0002-5906-2922
Current Organisation
University of Tasmania
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Publisher: Wildlife Information Liaison Development Society
Date: 26-01-2017
DOI: 10.11609/JOTT.2758.9.1.9743-9747
Abstract: An overview is given of literature containing distribution records of dragonflies and damselflies in Bhutan. Based on this an annotated checklist is presented which contains 92 species. Camacinia gigantea (Brauer, 1867) and Libellago lineata (Burmeister, 1839) are listed as new to Bhutan.
Publisher: Magnolia Press
Date: 22-03-2017
DOI: 10.11646/ZOOTAXA.4244.4.9
Abstract: Megalestes gyalsey spec. nov. is described from a single male from Trongsa District in Bhutan. The species was discovered during field work conducted in 2015 for the Bhutan invertebrate bio ersity project. The species is named in honour of His Royal Highness Crown Prince Jigme Namgyel Wangchuck, the Gyalsey of Bhutan, on the occasion of his first birthday.
Publisher: Wiley
Date: 07-2023
Abstract: Natural products isolation studies were performed on two Dodonaea species. This led to the discovery of one previously unreported prenylated flavonoid bearing a malonic acid moiety and six known compounds from the aerial parts of Dodonaea filiformis . In addition, three previously unreported natural products (another malonic‐acid‐containing prenylated flavonoid, a prenylated flavonoid and an ent ‐labdane diterpenoid) and seven known compounds were found from the flowers of D. viscosa . Furthermore, as a result of this work, a revised structure is proposed for a prenylated flavonoid previously isolated from D. viscosa .
Publisher: Elsevier BV
Date: 2022
DOI: 10.1016/J.FITOTE.2021.105088
Abstract: The first natural product isolation studies of Nothofagus gunnii (Hook.f.) Oerst and Nothofagus cunninghamii (Hook.f.) Oerst have been undertaken. A previously unreported stilbene derivative, pinosylvin monoacetate, was isolated from the leaves of N. gunnii, in addition to 14 known compounds including the flavonoids galangin, pinobanksin, catechin and quercetin sesquiterpenoids such as, ilicol and (+)-β-costol acetate 2,4-dihydroxy-6-methoxychalcone and pinosylvin. Four known flavonoid natural products, catechin, quercetin, ayanin, and avicularin were isolated from the leaves of N. cunninghamii. This study reveals that N. gunnii is a rich source of flavonoid, chalcone and stilbene compounds, while primarily hydroxyflavonoid compounds are found in N. cunninghamii. The isolated phytochemicals are consistent with the evolutionary relationships suggested to exist among Nothofagus species.
Publisher: Wildlife Information Liaison Development Society
Date: 26-10-2016
DOI: 10.11609/JOTT.2774.8.12.9467-9472
Abstract: A total of seven species from five genera, Delta de Saussure, 1855, Eumenes Latreille, 1802, Pareumenes (de Saussure, 1855), Labus de Saussure, 1867, and Zethus Fabricius, 1804, belonging to the subfamily Eumeninae of the family Vespidae are documented. Pareumenes quadrispinosus acutus Liu, 1941, Delta esuriens (Fabricius, 1787), D. conoideum (Gmelin, 1790), E. gibbosus Nguyen, 2015, Labus pusillus van der Vecht, 1963 and Zethus dolosus Bingham, 1897, including the subspecies P. q. acutus Liu, 1941, are new records for Bhutan.
Publisher: Wildlife Information Liaison Development Society
Date: 26-04-2017
DOI: 10.11609/JOTT.2423.9.4.10102-10108
Abstract: A total of eight species and subspecies of the genus Vespa, namely V. velutina nigrithorax du Buysson, 1905, V. basalis Smith, 1852, V. affinis affinis (Linnaeus, 1764), V. affinis indosinensis Pérez, 1910, V. mandarinia magnifica Smith, 1852, V. tropica leefmansi van der Vecht, 1957, V. bicolor Fabricius, 1787, V. analis nigrans du Buysson, 1903 along with Provespa barthelemyi (du Buysson, 1905) is recorded for the first time in Bhutan. The current number of species in the genus Vespa and Provespa found in Bhutan stands at 14. The records for V. mandarinia bellona Smith, 1871 and V. tropica tropica (Linnaeus, 1758) previously reported as from Maria Basti, Bhutan, must be confirmed.
Publisher: CSIRO Publishing
Date: 26-07-2022
DOI: 10.1071/CH22108
Abstract: Natural products isolation studies of 16 native Australian fern species have been undertaken, facilitated by pressurised hot water extraction (PHWE). Fourteen of these fern species have not been the subject of natural products isolation research previously. In total, 14 different compounds were isolated from 12 of these 16 different fern species. This included γ- and δ-lactones flavonoid glycosides, a dihydrobenzofuran neolignan, in addition to hydroxycinnamate/caffeic acid esters. More specifically, the lactones 5,6-dihydro-5-hydroxy-6-methyl-2H-pyran-2-one, 5-(1-hydroxyethyl)-2(5H)-furanone and osmundalin were obtained from Todea barbara, while a dihydrobenzofuran neolignan, (−)-trans-blechnic acid were found in Austroblechnum penna-marina subsp. alpina, and the shikimate ester 5-O-caffeoylshikimic acid was isolated from Parablechnum wattsii. In addition, flavonoids and their glycoside derivatives, kaempferol 3-O-glucopyranoside, 4β-carboxymethyl-(−)-epicatechin, (2R)-eriodictyol-7-O-β-d-glucopyranoside, naringin, quercitrin, quercetin 3-O-(6″-acetyl)-β-d-glucopyranoside, rutin, and tiliroside were isolated from seven other fern species.
Publisher: Magnolia Press
Date: 08-09-2020
DOI: 10.11646/ZOOTAXA.4849.1.1
Abstract: A checklist of the dragonflies and damselflies occurring in Bangladesh, Bhutan, India (including Andaman and Nicobar Islands), Nepal, Pakistan and Sri Lanka is presented. In total 588 (including 559 full species) taxa are known to occur in the region of which 251 taxa (species & subspecies) are single country endemics. Recent taxonomic changes relevant to the area are summarized. Sixteen taxa are synonymized and a checklist of all synonyms established since 1950 is provided. Information is given on available larval descriptions including a list of genera present in the region for which no larvae have yet been described. Numerous species occurring in the area are still poorly known and a list of genera for which a revision is urgently needed is provided. The following new synonyms are established: Calicnemia sudhaae Mitra, 1994 = Calicnemia imitans Lieftinck, 1948 syn. nov. Ceriagrion fallax cerinomelas Lieftinck, 1927 = Ceriagrion fallax Ris, 1914 syn. nov. Ceriagrion fallax pendleburyi Laidlaw, 1931 = Ceriagrion fallax Ris, 1914 syn. nov. Coenagrion kashmirus Chowdhary & Das, 1975 = Ischnura forcipata Morton, 1907 syn. nov. Enallagma insula Fraser, 1920 = Aciagrion occidentale Laidlaw, 1919 syn. nov. Himalagrion pithoragarhicum Sahni, 1964 = Ceriagrion fallax Ris, 1914 syn. nov. Ischnura bhimtalensis Sahni, 1965 = Ischnura rubilio Selys, 1876 syn. nov. Onychargia indica Sahni, 1964 = Paracercion calamorum (Ris, 1916) syn. nov. Anaciaeschna kashmirense Singh & Baijal, 1954 = Anaciaeschna martini (Selys, 1897) syn. nov. Cyclogomphus vesiculosus Selys, 1854 = Cyclogomphus ypsilon Selys, 1954 syn. nov. Chlorogomphus brittoi Navás, 1934 = Chlorogomphus xanthoptera (Fraser, 1919) syn. nov. Hylaeothemis indica Fraser, 1946 = Hylaeothemis apicalis Fraser, 1924 syn. nov. Sympetrum durum Bartenef, 1916 = Sympetrum striolatum commixtum Selys, 1884 syn. nov. Sympetrum himalayanum Navás, 1934 = Sympetrum hypomelas (Selys, 1884) syn. nov. Sympetrum haematoneura Fraser, 1924 = Sympetrum speciosum Oguma, 1915 syn. nov. Sympetrum speciosum taiwanum Asahina, 1951 = Sympetrum speciosum Oguma, 1915 syn. nov. In addition, Periaeschna lebasi Navás, 1930 is regarded a nomen nudum. The following new combinations are proposed: Onychogomphus acinaces Laidlaw, 1922 is transferred to the genus Melligomphus Chao, 1990 resulting in Melligomphus acinaces (Laidlaw, 1922) comb. nov. Onychogomphus saundersii Selys, 1854 is transferred to the genus Nychogomphus Carle, 1986 resulting in Nychogomphus saundersii (Selys, 1854) comb. nov..
Publisher: American Chemical Society (ACS)
Date: 06-2023
Location: Bhutan
No related grants have been discovered for Thinley Gyeltshen.