Crotalus totonacus is a venomous pit viper species found in northeastern Mexico. No subspecies are currently recognized.

Description

Adults frequently grow to more than 150 cm in length. The largest recorded specimen was 166.5 cm in length.

Geographic range

It is found in northeastern Mexico from central Nuevo León through southern Tamaulipas, northern Veracruz, eastern San Luis Potosí and northern Querétaro. The type locality given is "Panaco Island, about 75 mi south of Tampico, Veracruz, Mexico, 12 mi inland from Cabo Rojo".

Diet

Crotalus totonacus is known to prey on small mammals and birds. In addition to mammal hair and bird feathers found in stomachs, specific prey items include cave rats (Neotoma sp.), Allen’s tree squirrels (Sciurus alleni), and rock squirrels (Spermophilus [Otospermophilus] variegatus).

Taxonomy

This species was previously considered a subspecies of C. durissus.