Araeoscelis was around long, and superficially resembled a modern
lizard. It differed from other
araeoscelidians, such as
Petrolacosaurus, in that its
teeth were larger and blunter; possibly they were used for cracking
insect carapaces. Unlike
Petrolacosaurus, which possessed the two pairs of skull openings characteristic of
diapsids, in
Araeoscelis the lower pair of
temporal fenestrae were closed with
bone, resulting in a
euryapsid condition. This would have made the skull more solid, presumably allowing a more powerful bite. == Ichnology ==