- Western Hooknose Snake, Gyalopion canum Cope, 1860
- Desert Hooknose Snake, Gyalopion quadrangulare (Günther, 1893)
Distribution & habitat Edit
- G. canum - United States (Arizona, New Mexico, Texas) and Mexico (Sonora, Chihuahua, Coahuila, Durango, Zacatecas, San Luis Potosí, Nuevo León, Michoacán, Jalisco)
- G. quadrangulare - United States (Arizona) and Mexico (Sonora and Sinaloa)
Hooknose snakes prefer shortgrass prairie habitats.
Their base color is light brown with darker brown crossbands. Their ventral color is white or cream colored. Their most distinguishing feature is an upturned snout, which has a concave scale, as opposed to hognose snakes which have a keeled scale. They rarely grow beyond 10" in length.