Crocodilians
Crocodylia
The Crocodilia (or Crocodylia) is an order of mostly large, predatory, semiaquatic reptiles, known as crocodilians. They first appeared 83.5 million years ago in the Late Cretaceous period (Campanian stage) and are the closest living relatives of birds, as the two groups are the only known survivors of the Archosauria. Members of the order's total group, the clade Pseudosuchia, appeared about 250 million years ago in the Early Triassic period, and diversified during the Mesozoic era....
4 branches of this order, most-observed first · about 27 known species
Alligators and Caimans
familyAlligatoridae
Crocodiles
familyCrocodylidae
Gharials
familyGavialidae
Deinosuchus
genusDeinosuchus
Where it lives
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
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In the stacks
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Every page naming Crocodylia in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 26039.