Article: Characteristics of peripheral populations of parthenogenetic Cnemidophorus laredoensis a (Squamata: Teiidae), in southern Texas.

Abstract. -- From 1984-2004 the distributional ecology of the parthenogenetic Cnemidophorus laredoensis (= Aspidoscelis laredoensis) complex both north and south of the Rio Grande between Amistad Reservoir and the Gulf of Mexico was studied. Although dozens of sites inhabited by clonal complex A of C. laredoensis were discovered within a few km of the river (over a geographic range in parts of Webb, Zapata, Starr and Hidalgo counties, Texas, and Tamaulipas State, Mexico), the species was observed at only three sites in two Texas counties that were widely removed and apparently disjunct from the river-centered zone. In order to better understand what factors limit the ...

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