Calyptosuchus (meaning "covered crocodile") is an extinct genus of aetosaur from the Late Triassic of North America.

[1] Calyptosuchus was estimated to have been four metres long, or possibly larger, with a maximum carapace width of almost seventy centimetres.

Only a middle part of the dentary is present, with an edentulous patch to the anterior and nine dental alveoli posteriorly.

A maxilla assigned with partial certainty to Calyptosuchus has five dental alveoli, and probably contacted the external naris at a point.

The centrum of the axis is slightly wider than it is tall, but those of the other cervical vertebrae are taller than they are wide.

[1] Calyptosuchus was named by Long and Ballew (1985) on the basis of UMMP 13950, a partial carapace with a vertebral column and pelvis that had been discovered in the Tecovas Formation of western Texas in 1931 by Ermin Cowles Case, who only went as far to assign the specimen to Phytosauria in a 1932 paper.

This is because more material from the same species has been discovered, including a dentary bone, a possible maxilla, and further vertebrae from the neck and trunk.