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Some theoretical issues associated with fence, prairie and plateau lizards, Sceloporus undulatus.

Sceloporus undulatus as currently understood is divided into 10 subspecies that are grouped into three exerges (an exerge is a group of related subspecies): undulatus, consobrinus and tristichus. The subspecies within the undulatus and tristichus exerges have well developed gular and abdominal semeions, especially in the males. Females of the undulatus exerge lack abdominal semeions, though they may have small gular semeions. Females of the tristichus exerge possess both abdominal and gular semeions, and both are usually well developed. All the subspecies in the consobrinus exerge exhibit reduced semeions in males and absence of abdominal semeions and usually of gular semeions in females. These reductions are probably a function of predation pressures and habitat variables. We wonder if subspecies within the consobrinus exerge have evolved compensatory communication mechanisms. Hypotheses along these lines will be presented as well as a discussion of how they might be tested.

David Chiszar * and Hobart M. Smith *, Dept of Psychology and Dept of EPO Biology, University of Colorado, Boulder.

* Denotes membership in the Colorado-Wyoming Academy of Science.
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Author:Chiszar, David; Smith, Hobart M.
Publication:Journal of the Colorado-Wyoming Academy of Science
Article Type:Brief Article
Geographic Code:1USA
Date:Apr 1, 2002
Words:172
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