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Robert Alexander Pyron
George Washington University
12Publications
5H-index
306Citations
Publications 12
Newest
Published on May 1, 2019in Ecology and Evolution2.42
Omar Hernández-Ordóñez4
Estimated H-index: 4
(UNAM: National Autonomous University of Mexico),
Bráulio A. Santos15
Estimated H-index: 15
(UFPB: Federal University of Paraíba)
+ 5 AuthorsVíctor Hugo Reynoso12
Estimated H-index: 12
(UNAM: National Autonomous University of Mexico)
Published on Mar 12, 2019in PeerJ2.35
Seenapuram Palaniswamy Vijayakumar (IISc: Indian Institute of Science), Robert Alexander Pyron5
Estimated H-index: 5
(GW: George Washington University)
+ 6 AuthorsKartik Shanker17
Estimated H-index: 17
(IISc: Indian Institute of Science)
The Western Ghats (WG) is an escarpment on the west coast of Peninsular India, housing one of the richest assemblages of frogs in the world, with three endemic families. Here, we report the discovery of a new ancient lineage from a high-elevation massif in the Wayanad Plateau of the southern WG. Phylogenetic analysis reveals that the lineage belongs to Natatanura and clusters with Nyctibatrachidae, a family endemic to the WG/Sri Lanka biodiversity hotspot. Based on geographic distribution, uniqu...
Published on Feb 26, 2019in Zootaxa0.99
Robert Alexander Pyron5
Estimated H-index: 5
(GW: George Washington University),
Ruchira Somaweera10
Estimated H-index: 10
(CSIRO: Commonwealth Scientific and Industrial Research Organisation)
A recent paper dealing with the systematics of Uropeltidae (Pyron et al . 2016) made several taxonomic changes affecting Sri Lankan species in the genera Platyplectrurus Gunther, 1868; Pseudotyphlops Schlegel, 1839; Rhinophis Hemprich, 1820; and Uropeltis Cuvier, 1829. Space precluded a full discussion of those changes, for which there was a wealth of additional photographs, data, and references. Here, we expand on those alterations and provide further justification with reference to the ICZN (1...
Published on Sep 1, 2017in Ecology and Evolution2.42
Derek B. Tucker3
Estimated H-index: 3
(UWF: University of West Florida),
Stephen Blair Hedges1
Estimated H-index: 1
(TU: Temple University)
+ 2 AuthorsJack W. Sites39
Estimated H-index: 39
(BYU: Brigham Young University)
The phylogenetic relationships and biogeographic history of Caribbean island ameivas (Pholidoscelis) are not well-known because of incomplete sampling, conflicting datasets, and poor support for many clades. Here, we use phylogenomic and mitochondrial DNA datasets to reconstruct a well-supported phylogeny and assess historical colonization patterns in the group. We obtained sequence data from 316 nuclear loci and one mitochondrial marker for 16 of 19 extant species of the Caribbean endemic genus...
Published on Dec 30, 2016in Zoosystema1.12
Robert Alexander Pyron5
Estimated H-index: 5
(GW: George Washington University),
S. R. Ganesh3
Estimated H-index: 3
+ 3 AuthorsRuchira Somaweera10
Estimated H-index: 10
(CSIRO: Commonwealth Scientific and Industrial Research Organisation)
We present a catalogue and systematic overview of Uropeltidae Muller, 1832 based on both new and previously published molecular and morphological data, and a new molecular phylogenetic analysis. We support the monophyly and distinctiveness of Brachyophidium Wall, 1921, Melanophidium Gunther, 1864, Platyplectrurus Gunther, 1868, Pseudoplectrurus Boulenger, 1890, and Teretrurus Beddome, 1886. We move Uropeltis melanogaster (Gray, 1858), U. phillipsi (Nicholls, 1929), and Pseudotyphlops Schlegel, 1...
Published on Dec 26, 2016in Journal of Threatened Taxa
Amit Sayyed2
Estimated H-index: 2
,
Robert Alexander Pyron5
Estimated H-index: 5
(GW: George Washington University),
Neelesh Dahanukar10
Estimated H-index: 10
(IISc: Indian Institute of Science)
Cnemaspis flaviventralis , a new species of day gecko, is described from the forests of Amboli, Sindhudurg District, Maharashtra State, northern Western Ghats, India. The new species was previously confused with the sympatric species Cnemaspis girii , C. indraneildasii, C. kolhapurensis and C. goaensis. It is distinguished from C. giri by having spine-like tubercles on flanks, granular dorsal scales intermixed with large, depressed, slightly keeled scales (vs. lack of spine-like tubercles on fla...
Published on May 1, 2015in Ecology Letters8.70
Ricardo Betancur-R.17
Estimated H-index: 17
(UPR-RP: University of Puerto Rico, Río Piedras),
Guillermo Ortí44
Estimated H-index: 44
(GW: George Washington University),
Robert Alexander Pyron5
Estimated H-index: 5
(GW: George Washington University)
The marine-freshwater boundary is a major biodiversity gradient and few groups have colonised both systems successfully. Fishes have transitioned between habitats repeatedly, diversifying in rivers, lakes and oceans over evolutionary time. However, their history of habitat colonisation and diversification is unclear based on available fossil and phylogenetic data. We estimate ancestral habitats and diversification and transition rates using a large-scale phylogeny of extant fish taxa and one con...
Published on Oct 1, 2014in Diversity and Distributions4.09
Jéssica Fenker3
Estimated H-index: 3
(UnB: University of Brasília),
Leonardo G. Tedeschi2
Estimated H-index: 2
(UnB: University of Brasília)
+ 1 AuthorsCristiano Nogueira12
Estimated H-index: 12
(UnB: University of Brasília)
Aim To analyze impacts of habitat loss on evolutionary diversity and to test widely used biodiversity metrics as surrogates for phylogenetic diversity, we study spatial and taxonomic patterns of phylogenetic diversity in a wide-ranging endemic Neotropical snake lineage. Location South America and the Antilles. Methods We updated distribution maps for 41 taxa, using species distribution models and a revised presence-records database. We estimated evolutionary distinctiveness (ED) for each taxon u...
Published on Jul 8, 2014in Zootaxa0.99
Robert Alexander Pyron5
Estimated H-index: 5
(GW: George Washington University),
Van Wallach8
Estimated H-index: 8
The blindsnake superfamily Typhlopoidea (Gerrhopilidae, Typhlopidae, and Xenotyphlopidae) is a diverse, widespread part of the global snake fauna. A recent systematic revision based on molecular phylogenetic analyses and some morphological evidence presented a preliminary solution to the non-monophyly of many previously recognized genera, but additional clarification is needed regarding the recognition of some species and genera. We rectify these problems here with a new molecular phylogenetic a...
Published on Jan 1, 2014
Robert Alexander Pyron5
Estimated H-index: 5
,
Van Wallach8
Estimated H-index: 8
FIGURE 3. Approximate distribution maps for species from 7 of 19 typhlopoid genera: Grypotyphlops, Letheobia, Lemuriatyphlops, Cyclotyphlops, Acutotyphlops, Afrotyphlops, and Ramphotyphlops.
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