Family Crocodylidae

Alligator - An Alligator is a crocodilian in the genus Alligator of the family Alligatoridae.

Caiman - Caimaninae are one of two subfamilies of the family Alligatoridae.

Gavialis - The fossil history of the Gavialoidea is quite well known, with the earliest examples diverging from the other crocodilians in the late Cretaceous.

Melanosuchus - The black caiman has a bony ridge over red eyes, and black, scaly skin.

Osteolaemus - Dwarf crocodiles attain a medium adult length of 1.

Paleosuchus - Paleosuchus is a South American genus of reptile in the Alligatoridae family.

Tomistoma - From a morphological standpoint, it has been originally placed within the family Crocodylidae, but recent immunological studies have shown that it is more closely related to the gharial than was originally thought.