Stevland Charles

Stevland Charles
Howard University | HU · Department of Biology

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17
Publications
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89
Citations

Publications

Publications (17)
Article
Full-text available
In this study, we analyse New World coral snakes in a phylogenetic framework based upon an increased molecular data set, including novel sequences for the only two sympatric species known from an island (Trinidad, West Indies). Their presence in Trinidad and absence in Tobago offers a unique system to study the phylogeography of the region. We asse...
Article
Full-text available
The phylogenetic and systematic relationships of the reduced limbed lizards of the genus Bachia are poorly understood. Here, we investigate the eastern Caribbean Bachia assigned to the B. heteropa and B. flavescens groups, whose members are characterized by a band of hexagonal or quadrangular scales on the dorsum, respectively. The polytypic Bachia...
Article
Full-text available
Tobago is a small island on the southeast edge of the Caribbean Plate with a continental flora and fauna. Using DNA sequences from Genbank, new sequences, and morphological data from the snakes Erythrolamprus epinephalus, E. melanotus, E. reginae, and E. zweifeli, the species status of specimens of a Tobago snake previously considered to be Erythro...
Article
Full-text available
The Neotropical genus Polychrus contains seven species of arboreal lizards. The type species for the genus is the widespread Polychrus marmoratus. We compared a few populations of P. marmoratus using 16S and COI mitochondrial gene sequences (1,035 bp total) and found several lineages existing under the name Polychrus marmoratus. Working backwards,...
Article
Full-text available
Tegus of the genera Tupinambis and Salvator are the largest Neotropical lizards and the most exploited clade of Neotropical reptiles. For three decades more than 34 million tegu skins were in trade, about 1.02 million per year. The genus Tupinambis is distributed in South America east of the Andes, and currently contains four recognized species, th...
Data
Morphological analysis using a cluster analysis (S2A) and PCA (S2B). (PDF)
Data
Elaboration on some nomenclatural issues and illustrated with S3A and S3B Fig. (PDF)
Data
Estimated phylogenies using MrBayes3.2.5. (PDF)
Data
Specimen vouchers and Genbank accession numbers. (PDF)
Article
Full-text available
Amphibians and reptiles are among the most threatened vertebrate taxa. Protected areas represent a conservation Nine amphibian species and twenty-eight reptile species have previously been reported at Aripo Savannas. Our surveys detected 19 amphibian species (10 previously unrecorded) and 40 reptile species (12 previously unrecorded) in the reserve...
Article
Full-text available
Currently, two snake species of the genus Leptophis occur in Trinidad and Tobago. One, L. stimsoni, is endemic to Trini-dad's Northern Range and known from relatively few specimens. The second is the diurnal, arboreal, brightly colored par-rot snake Leptophis coeruleodorsus Oliver. It was originally described based on 23 specimens from Trinidad, To...
Article
Full-text available
We report a range extension and new country record for Scarthyla vigilans in Trinidad, West Indies. The species was previously known only from populations on mainland South America. We include notes on behavior, habitat and tadpole development, and discuss the biogeographical significance of the species' presence in Trinidad, particularly with resp...

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