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Scutellation, meristic, and color pattern characters referenced in this study were identified and described in Tables 2-4.
tesselata E from sites of syntopy in Presidio County, sorted into samples based on the foregoing color pattern characters, were also distinctive in the following scutellation character states (see Table 2) described for the former species followed by the latter species: postantebrachial scales granular (versus scales very slightly enlarged) and scales bordering the edge of the gular fold small (versus scales enlarged).
The qualitative scutellation characters examined in all specimens included sizes of the postantebrachial scales on the posterior aspect of each forearm and of the mesoptychial scales bordering the edge of the gular fold, anterior extent of the circumorbital scale series on both sides of the head, and number of parietal scales on the posterior aspect of the head (see Duellman and Zweifel, 1962).
Analyses of qualitative characters of scutellation, meristic variables (Table 1), color pattern (Figs.
Key words: Squamata, supraocular scutellation, specific lepidosis pattern, diagnosis, Pleurodonta, taxonomy
Given the noticeable position of these supraocular scales in the head scutellation of Squamata, their presence has generally been reported in many diagnostic descriptions of species.
sexlineatus (for example, in Alabama and Georgia) tend to exhibit much higher mean values for scutellation than do the western populations of C.
Scutellation and Meristic Characters--Specimens from South Padre Island and Tamaulipas possess characters that are diagnostic for A.
This is indicated by the wide range of character variability and clinial variation in color pattern and scutellation throughout its geographic range as expected in relative recently differentiated and expanding populations (Vanzolini and Williams, 1970).
Study of geographic variation in features of scutellation and pattern prompts recognition of a new subspecies of Bogertophis subocularis.
It differs from all Cuban species of Anolis in its green coloration with greenish gray bands on body, legs and tail, in having subtriangular mental scales as well as in other details of color and scutellation.
Dorsal scale formulae--15-15-11 (two specimens), 15-15-12 (two), and 15-15-13 (one)--and the head scutellation of the Cuatro Cienegas material was typical for the subspecies.