|Scientific Name:||Aspidoscelis sexlineata|
|Species Authority:||(Linnaeus, 1766)|
Cnemidophorus sexlineatus (Linnaeus, 1766)
|Taxonomic Notes:||Reeder et al. (2002) examined phylogenetic relationships of the whiptail lizards of the genus Cnemidophorus based on a combined analysis of mitochondrial DNA, morphology, and allozymes. They determined that Cnemidophorus in the traditional sense is paraphyletic and thus in need of nomenclatural revision. Rather than subsume all cnemidophorine species (including Kentropyx) in a single large genus (Ameiva), they proposed a split that placed the North American "Cnemidophorus" clade in the monophyletic genus Aspidoscelis; under this arrangement, South American taxa remain in the genus Cnemidophorus.
See Walker et al. (1990) for information on continuing hybridization between A. sexlineata and A. tesselata in Colorado.
|Red List Category & Criteria:||Least Concern ver 3.1|
|Assessor/s:||Hammerson, G.A., Lavin, P. & Mendoza Quijano, F.|
|Reviewer/s:||Cox, N., Chanson, J.S. & Stuart, S.N. (Global Reptile Assessment Coordinating Team)|
Listed as Least Concern in view of the wide range, large and probably relatively stable extent of occurrence, area of occupancy, number of subpopulations, and population size. No major threats are known.
|Range Description:||The range extends from Maryland to southern Florida, north to Wisconsin, east to eastern Wyoming, eastern Colorado, eastern New Mexico, and central Texas, and south to southern Texas and the Gulf Coast (Trauth and McAllister 1996). Ranges into extreme northeast Tamaulipas, Mexico.|
Native:Mexico; United States
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species is represented by at least several hundred occurrences or subpopulations (e.g., see map in Trauth and McAllister 1996). The total adult population size is unknown but probably exceeds 1,000,000. The extent of occurrence, area of occupancy, number of subpopulations, and population size are probably relatively stable or very slowly declining.|
|Habitat and Ecology:||This lizard inhabits sunny areas with open ground; grassland, sandhills, sandy or gravelly banks and floodplains of streams, sparsely vegetated rocky areas at base of mountains, woodland edges and open woods, and beach dunes. It generally takes shelter underground or under rocks or other objects on the ground. Eggs are laid in a nest dug in soft soil or sawdust pile (Mount 1975) or under logs or other sheltering objects (Barbour 1971).|
|Major Threat(s):||No major threats have been identified. Locally, some populations have declined or disappeared as a result of conversion of habitat to human uses. Historically, much habitat may have been lost with agricultural expansion.|
|Conservation Actions:||This species occurs in many parks and other protected areas. No direct conservation measures are currently needed for the species as a whole.|
|Citation:||Hammerson, G.A., Lavin, P. & Mendoza Quijano, F. 2007. Aspidoscelis sexlineata. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 19 June 2013.|
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