DistributionRead full entry
Range DescriptionThe range encompasses southern Texas (Garcia-Prieto et al. 2000) and much of northern Mexico. Dixon (2000) regarded the Kleberg County and Refugio County records in Texas as representing "accidental introductions," and Garcia-Prieto et al. (2000) similarly concluded that they were extralimital, thus restricting the native range to four counties along the lowermost Rio Grande. Taxonomic uncertainties obscure the precise extent of the range in Mexico; Lara-Góngora (2004) recently included populations of much of Chihuahua, Sonora and possibly Sinaloa in S. lemnosespinali.