Gavialoidea

Gavialoidea is one of three superfamilies of crocodilians, the other two being Alligatoroidea and Crocodyloidea. Although many extinct species are known, only the gharialGavialis gangeticus and the false gharialTomistoma schlegelii are alive today, with Hanyusuchus having become extinct in the last few centuries.

Extinct South American gavialoids likely dispersed in the late Paleogene from Africa and Asia. Fossil remains of the Puerto Rican gavialoid Aktiogavialis puertorisensis were discovered in a cave located in San Sebastián, Puerto Rico and dated to the Oligocene. This individual is thought to have crossed the Atlantic coming from Africa, indicating that this species was able to withstand saltwater.