Molecular and morphologic data reveal multiple species in .

DNA sequence and morphometric data were used to re-evaluate the taxonomy and systematics of . Phylogenetic analyses (maximum likelihood and Bayesian inference) of DNA sequences from the mitochondrial cytochrome- gene in 44 samples of indicated 2 well-supported monophyletic clades. The 1st clade contained specimens from Texas historically assigned to ; the 2nd was comprised of specimens previously referable to , , and obtained from northern and eastern Mexico.