Edward Harrison Taylor

Bio: Edward Harrison Taylor is an academic researcher. The author has contributed to research in topics: Checklist & Herpetology. The author has an hindex of 6, co-authored 7 publications receiving 282 citations.

Ofidios da amazonia . As cobras da regiao leste do para

Abstract: This monograph is an updated second editian of the work entitled The Snakes of Eastern Pará, with new information on the taxonomy, biology, ecology and geographic dístribution on almo: .•11the species covered. Most of the tracts of primary forest referred to in 1978, especially those in the region of the rivers Urumajô, Piriá, Gurupi, pan of the upper Guamâ, Apeú and other smaller areas, including parts of MosrJUeiro ísland, have suffered deforestation (Map 1). The present study covers snakes belonging 12 species not referred to in the previous work of 1978: Oxyrhopus melanogenys orientalis, Atractus alponsehogei, Atractus flammigerus snethlageae, Atractus schach, Atractus zidoki, Typhlops brongersmianus, Chironius exoletus, Chironius fuscus, Chironius multiventris, Liophis cobellus cobellus, Liophis miliaris chrisostomus and Uromacerina ricardini. The absence from the region of a number of species (Leptotyphlops albifrons, Leptotyphlops tenella, Helicops leopardinus, Atractus emmeli, Pseudoboa merremi and Micrurus collaris) reported by previous authors, but not recorded in the first edition of the present work, is here reconfirmed. There have been taxonomic alterations in four genera (Atractus, Chironius, Liophis and Bothrops) since 1978, the latter being divided into five genera, two of which, Bothriopsis and Bothrops, are found in eastem Pará. Previously known only from neighboring regions, Rhinobothryum lentiginosus ís now reported for eastem Pará.

Quantifying ecological, morphological, and genetic variation to delimit species in the coast horned lizard species complex (Phrynosoma).

Abstract: Lineage separation and divergence form a temporally extended process whereby populations may diverge genetically, morphologically, or ecologically, and these contingent properties of species provide the operational criteria necessary for species delimitation. We inferred the historical process of lineage formation in the coast horned lizard (Phrynosoma coronatum) species complex by evaluating a diversity of operational species criteria, including divergence in mtDNA (98 specimens; 2,781 bp) and nuclear loci (RAG−1, 1,054 bp; BDNF 529 bp), ecological niches (11 bioclimatic variables; 285 unique localities), and cranial horn shapes (493 specimens; 16 landmarks). A phylogenetic analysis of mtDNA recovers 5 phylogeographic groups arranged latitudinally along the Baja California Peninsula and in California. The 2 southern phylogeographic groups exhibit concordance between genetic, morphological, and ecological divergence; however, differentiation is weak or absent at more recent levels defined by phylogeographic breaks in California. Interpreting these operational species criteria together suggests that there are 3 ecologically divergent and morphologically diagnosable species within the P. coronatum complex. Our 3-species taxonomic hypothesis invokes a deep coalescence event when fitting the mtDNA genealogy into the species tree, which is not unexpected for populations that have diverged recently. Although the hypothesis that the 3 phylogeographic groups distributed across California each represent distinctive species is not supported by all of the operational species criteria evaluated in this study, the conservation status of the imperiled populations represented by these genealogical units remains critical.