About Heloderma exasperatum Bogert & Martin Del Campo, 1956
Heloderma exasperatum, commonly known as the Rio Fuerte beaded lizard, was formally described by Bogert & Martin Del Campo in 1956. Adult Rio Fuerte beaded lizards measure 60 to 90 cm (23.6 to 35.4 in) in total length when measured including the tail, and can reach a maximum weight of 4 kg (8.8 lb). In both appearance and size, this species is very similar to the Mexican beaded lizard. Its geographic range covers southwestern Chihuahua and southern Sonora, Mexico, where it occurs at altitudes up to 1,400 m (4,600 ft). This species reproduces via oviparity, meaning it lays eggs.
