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

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.

ResumenSe recolectaron 3 individuos de la poco conocida cascabel cola larga de Sinaloa, Crotalus stejnegeri en Concordia, en el sur de Sinaloa, México. Los datos morfométricos y de escamaciún fueron comparados con informaciún disponible en la literatura reciente. Se discuten brevemente aspectos de distribuciún geográfica, protecciún legal, patrones de actividad, coloraciún y sonido del cascabel. Se registra un límite inferior de la distribuciún altitudinal de 400 m y una longitud total máxima de 79.0 cm.