Culebra Chata

diagnosis

Diagnosis Well-developed rostral scale, elongated and with free edges; 8 or 9 supralabials, fourth and fifth or fifth and sixth supralabial in contact with the eye; normally 10 infralabials; a single loreal scale; preocular divided; prenasal scale in contact with the second supralabial; a second pair of chinshields separated by a row of scales; 178 – 200 ventral scales and 89 – 106 subcaudals; maxillary teeth normally 10 + 3. Color pattern consists of a pale vertebral line extending to the top of the head, three to five rows of scales wide on the first third of the body reduced to only three on posteriorly; head bordered by a pair of continuous dorsolateral lines from the loreal region throughout the body, with dark line on the sixth and seventh lines of dorsal scales; Sometimes with an inconspicuous lateral line at third row of dorsal scales. Salvadora grahamiae differs from S. lineata by having inconspicuous or absent lateral lines, and differs from other congeners by having the tail approximately one quarter of the total length (22 – 29 %); loreal scale not divided, posterior chinshields separated by a two row of scales; and the vertebral line up to five scales wide on anterior

Phylogenetic relationships based on morphological data and taxonomy of the genus Salvadora Baird & Girard, 1853 (Reptilia, Colubridae)

distribution

Distribution and conservation From western Texas, northern Coahuila, Chihuahua, and Sonora to northern Arizona and New Mexico (Fig. 7). It occurs in several protected natural areas in Mexico and the United States. Mexico and the United States have not listed this species in any protection category, and it is on the IUCN red list as a species of Least Concern.

Phylogenetic relationships based on morphological data and taxonomy of the genus Salvadora Baird & Girard, 1853 (Reptilia, Colubridae)

etymology

Etymology Dedicated to the collector of the taxon, J. D. Graham.

Phylogenetic relationships based on morphological data and taxonomy of the genus Salvadora Baird & Girard, 1853 (Reptilia, Colubridae)

materials_examined

Type material examined UNITED STATES • ♂; Arizona, Cochise County, Huachuca Mountains, limited to Sonora (Bogert 1939 a); J. D. Graham leg.; USNM 2081.

Phylogenetic relationships based on morphological data and taxonomy of the genus Salvadora Baird & Girard, 1853 (Reptilia, Colubridae)