an order of reptiles having upper and lower temporal arcades, a hard palate, an immovable quadrate, loose abdominal ribs, socketed teeth; large powerful amphibious forms. Crocodiles, Alligators, Caima, kõrgeima arengutasemega roomajate selts; 23 liiki. Selts jaguneb kolmeks sgk-ks: alligaatorlased (Alligatoridae), krokodilllased (Crocodylidae) ja gaaviallased (Gavialidae). Elutsevad troopilistes ja