Geophis pyburniGeophis pyburni, also known as Pyburn's earth snake, is a species of snake in the colubrid family. It is endemic to Mexico. It is only known from its type locality, Rancho La Pastilla in the Sierra de Coalcoman, Michoacan.EtymologyThe specific name, pyburni, is in honor of American herpetologist .DescriptionGeophis pyburni measure in total length. Tail makes 13–16 % of the total length. The dorsum is dark brown, becoming lighter laterally.