Notes on scutellation, length, and distribution of rattlesnakes (serpentes: viperidade: crotalus) in the state of hidalgo, México.

We studied the eight species of Crotalus inhabiting the Mexican state of Hidalgo and found additional variation involving number of scales, body length, and distribution previously unreported in the literature. Supplementary morphological variation is reported for C. aquilus and C. atrox, and new distributional records are reported for C. aquilus, C. atrox, C. intermedius, C. scutulatus, and C. totonacusEstudiamos las ocho especies del género Crotalus distribuidas en el estado de Hidalgo y encontramos variación adicional a la registrada en la literatura. C. aquilus y C. atrox registran variación morfológica, mientras que se registran nuevos datos de distribución para C. aquilus, C. atrox C. intermedius, C. scutulatus, y C. totonacus