DistributionRead full entry
Range DescriptionThe range extends along a small area paralleling the Rio Grande in southern Texas and adjacent Tamaulipas, Mexico, from near Brownsville to the vicinity of Del Rio, including some localities well away from the Rio Grande (Walker 1987, Paulissen and Walker 1998, Bartlett and Bartlett 1999).
Morphotype LAR-A (the form originally described as Cnemidophorus laredoensis) occurs on both sides of Rio Grande from Laredo and Nuevo Laredo southeast to south-central Hidalgo County and adjacent Tamaulipas, and in a few sites away from the river in parts of Dimmit, LaSalle, and Starr counties.
Morphotype LAR-B has disjunct distribution from Del Rio (Val Verde County) and adjacent Mexico southeast along the Rio Grande to northern Webb County and then from south-central Starr County and adjacent Mexico eastward to within 16 km of the Gulf of Mexico; all localities presently known for LAR-B are within 0.8 km of the Rio Grande (Paulissen et al. 1988).
Abuhteba et al. (2000) used the results of histocompatibility reactions to conclude that the name A. laredoensis should be restricted to populations in Texas and Mexico that are diagnostically identical with the parthenogenetic species described from two sites in Laredo, Webb County, Texas, in 1973.