Hemipenes of the long-tailed rattlesnakes (Serpentes: Viperidae) from Mexico

Herein, we describe and compare the morphologies of the hemipenes of the three longtailed rattlesnakes to ascertain whether the uniquefeatures of the copulatory organ of Crotalus stejnegeri are shared with the other two species and whether there are additional hemipenial characters that further distinguish the three taxa.