Phytosaurus is a dubious genus of phytosaur (an extinct group of superficially crocodile-like archosaurs), and also the first phytosaur to be described, by G. Jaeger in 1828. It had a crocodile-like body structure, but its nostrils were on its forehead, not the tip of its snout. The name Phytosaurus means "plant lizard" (though it is now known to have been a carnivore), and the type species is P. cylindricodon.