The teeth were laterally compressed and >strongly< recurved. The teeth were so highly curved that they seem unable to penetrate flesh and the tooth row extends far behind the orbit. The lower teeth were relatively tiny. Such an arrangement suggests something other than a meat-eating diet, perhaps some sort of filtering or plant-eating. The parasphenoid is uniquely expanded laterally and posteriorly, and bears rows of teeth on ridges. The quadratojugal curved up posteriorly as did the slender mandible. A strange skull indeed.
Langston W Jr and Reisz RR 1981. Aerosaurus wellesi, new species, a varanopseid mammal-like reptile (Synapsida: Pelycosauria) from the Lower Permian of New Mexico. Journal of Vertebrate Paleontology 1:73–96.