New records of the rare Sinaloan Long-tailed Rattlesnake, Crotalus stejnegeri, from southern Sinaloa, Mexico

Abstract

Three specimens of the rare Sinaloan Long-tailed Rattlesnake, Crotalus stejnegeri, were obtained from
Concordia, southern Sinaloa, Mexico. Morphometric and scalation data were compared with information available
from recent literature, and aspects of geographical distribution, legal protection, activity patterns, coloration, and rattle
sound are briefly discussed. These new records extend the lowest elevation limit for this species to 400 m and the
maximum known total length to 79.0 cm.