Alligatoridae:

Alligator mississippiensis (American Alligator)

Alligator sinensis (Chinese Alligator)

Caiman crocodilus (Caiman) includes C. crocodilus crocodilus, C. c. fuscus, C. c. apaporiensis, C. c. chiapasius

Caiman latirostris (Broad-snouted Caiman)

Caiman yacare (Yacaré Caiman)

Melanosuchus niger (Black Caiman)

Paleosuchus palpebrosus (Dwarf Caiman)

Paleosuchus trigonatus (Smooth-fronted Caiman)

Crocodylidae:

Crocodylus acutus (American Crocodile)

Crocodylus halli (Hall’s New Guinea Crocodile) Southern New Guinea. Specimens in US collections.

Crocodylus intermedius (Orinoco Crocodile)

Crocodylus johnstoni (Johnstone’s Crocodile, Australian Freshwater Crocodile)

Crocodylus mindorensis (Philippine Crocodile)

Crocodylus moreletii (Morelet’s Crocodile)

Crocodylus niloticus (Nile Crocodile)

Crocodylus novaeguineae (New Guinea Crocodile) Northern New Guinea. None in the US.

Crocodylus palustris (Mugger Crocodile)

Crocodylus porosus (Saltwater Crocodile)

Crocodylus rhombifer (Cuban Crocodile)

Crocodylus siamensis (Siamese Crocodile)

Crocodylus suchus (West African Crocodile)

Mecistops cataphractus (West African Slender-snouted Crocodile) West Africa. In the U.S.

Mecistops leptorhynchus (Central African Slender-snouted Crocodile) Central Africa. None in the U.S.

Osteolaemus tetraspis (African Dwarf Crocodile) Includes O. tetraspis tetraspis, O. tetraspis osborni

Gavialidae:

Gavialis gangeticus (Indian Gharial)

Tomistoma schlegelii (Tomistoma)