Mesosuchia

"Mesosuchia" is an obsolete name for a group of terrestrial, semi-aquatic, or fully aquatic crocodylomorph reptiles.

==Characteristics== Mesosuchians differ from modern eusuchians by a shorter secondary palate, in which the choana is not surrounded by the medial pterygoid plate, and by the amphicoelom of the vertebrae. The secondary palate is formed by the premaxillary, maxillary and palatine bones. The inner nostrils are usually located between the palatine and pterygoid bones. The jaw bones sometimes join dorsally and push the nasal bones away from the premaxillary bones. The outer nostrils usually merge. The preorbital foramen is almost always lost. The superior temporal fossa is large, and the frontal bone reaches its edge. The postorbital arch is often located directly under the skin. The pubis does not enter the acetabulum. The carapace is usually well developed.