Crocodilia
Crocodiles, Alligators, Caimans, Gharials and More!
The crocodilians include alligators, caimans, crocodiles, and gharials. Crocodalia splits alligators and crocodiles into different groups in Crocodalia. The way to tell the difference between alligators and crocodiles is very simple. The main way I personally use is that the snouts of crocodiles are more triangular than alligators, and alligator snouts are wider. (Gharials' snouts look like straight lines and are very easy to tell apart from that.) Another way to tell is that crocodiles often have more teeth showing from the side of their mouth than alligators. In addition, caimans are often smaller than alligators, crocodiles, and gharials.
Crocodylidae
Alligatoridae
Crocodylinae
Osteolaeminae, Crocodylius, Mesitops
Gavialidae
Gavialis, Tomistoma
Alligatoridae
Caimaninae, Melanosuchus, Paleosuchus, Alligatorinae (Fun Fact: There are 2 species of alligator, the chinese and american.)