Affiliation:
1. Department of Biology The University of Texas at Arlington Arlington Texas USA
2. Department of Biological Sciences Sam Houston State University Huntsville Texas USA
3. Unidad de Investigación, Instituto Nacional de Biodiversidad (INABIO) Quito Pichincha Ecuador
Abstract
AbstractThe rough teiid or water cork lizard (Echinosaura horrida) is a small reptile from Colombia and Ecuador placed in a genus that contains eight species and well‐known phylogenetic relationships. Here we provide a detailed description and illustrations, bone by bone, of its skull, while we discussed its intraspecific variation by comparing high‐resolution computed tomography data from two specimens and the variation within the genus by including previously published data from Echinosaura fischerorum. This allowed to propose putative diagnostic character states for Echinosaura horrida and synapomorphies for Echinosaura. In addition, our discussion includes broader comparisons of new character transformations of the jugal, vomer, orbitosphenoid, and hyoid. These characters are important for diagnosing clades at different levels of the Gymnophthalmoidea phylogeny.
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