[1][3] It is only known from its type locality, Rancho La Pastilla in the Sierra de Coalcoman, Michoacan.

[1] The specific name, pyburni, is in honor of American herpetologist William Frank "Billy" Pyburn [fr] (1927–2007).

[2][3][4] Geophis pyburni measure 24.7–29.9 cm (9.7–11.8 in) in total length.

Tail makes 13–16 % of the total length.

The dorsum is dark brown, becoming lighter laterally.