Triprion

Triprion is a genus of frogs (the shovel-headed tree frogs) in the family Hylidae found in the Pacific lowlands of Mexico, the Yucatán Peninsula, and Guatemala. These frogs hide in tree-holes and plug the entrance with their strange-looking, bony heads.

Species
Three species in this genus are recognized:
 * Triprion petasatus (Cope, 1865) - Yucatán shovel-headed tree frog
 * Triprion spatulatus Günther, 1882 - Mexican shovel-headed tree frog
 * Triprion spinosus (Steindachner, 1864) - Spiny-headed tree frog