Aegisuchus is known only from a partial braincase and skull roof cataloged as ROM 54530.
It is diagnosed by several autapomorphies, or unique features.
At the center of the skull table is a raised and rough-surfaced boss on the parietal bone that is shaped like a circle.
On either side of this boss are holes called dorsotemporal fenestrae, and the surrounding bone is relatively smooth.
The quadrate bone in the temporal region of the skull has a rectangular projection called the adductor tubercle, which served as an attachment for muscles that closed the jaw.
At the front of the skull table, projections on the laterosphenoid bones called capitate processes face out to the side.
This feature is also seen in the skulls of living gharials, but evolved independently in each group.
Also on the front surface are two holes of the dorsotemporal fenestrae, which pass through the skull and open at the skull table.
On the front surface, a ridge of bone or torus makes up the lateral edge of each hole.
The back of the skull is wide, with large projections on the exoccipital bones that would have anchored large epaxial muscles in the top part of the neck.
Aegisuchus is known only from a partial braincase and skull roof cataloged as ROM 54530. It is diagnosed by several autapomorphies, or unique features. At the center of the skull table is a raised and rough-surfaced boss on the parietal bone that is shaped like a circle. On either side of this boss are holes called dorsotemporal fenestrae, and the surrounding bone is relatively smooth. The quadrate bone in the temporal region of the skull has a rectangular projection called the adductor tubercle, which served as an attachment for muscles that closed the jaw. At the front of the skull table, projections on the laterosphenoid bones called capitate processes face out to the side. This feature is also seen in the skulls of living gharials, but evolved independently in each group. Also on the front surface are two holes of the dorsotemporal fenestrae, which pass through the skull and open at the skull table. On the front surface, a ridge of bone or torus makes up the lateral edge of each hole. The back of the skull is wide, with large projections on the exoccipital bones that would have anchored large epaxial muscles in the top part of the neck.
Aegisuchus