Angistorhinus (meaning "narrow snout" or "hook snout") is an extinct genus of phytosaur known from the Late Triassic period of Texas and Wyoming, United States.

[3] In 1995, Long and Murry created the new combination, Angistorhinus megalodon by synonymy for Brachysuchus.

[4] Hungerbühler and Sues (2001) hypothesised that Angistorhinus is a junior synonym of Rutiodon.

It was similar to Parasuchus but differed in having the nostrils located further back, towards and above the eyes.

Angisthorhinus was a huge animal by any standards; the skull length was about 120–124 cm; estimated overall length 7 to 8 meters, more in A. megalodon, a very large, short and heavy-muzzled form sometimes given its own genus (Brachysuchus), and which far exceeded in size any living crocodile.