Lagosuchus

Lagosuchus is a genus of small archosaur from the middle Triassic period. It is generally thought to be closely related to dinosaurs, as a member of the Dinosauromorpha. Its fossils were found in the Chañares Formation of Argentina, dating to the Middle Triassic (Ladinian age), about 230 million years ago.

Jurassic Park
Lagosuchus has never appeared or mentioned in any Jurassic Park films or books, it has however appeared in the Dinosaur Field Guide as well as the Jurassic World Dinosaur Field Guide.