Charassognathus

Charassognathus (meaning 'notched jaw') is an extinct genus of Late Permian cynodonts. Described in 2007 from a locality near Fraserburg, South Africa, "Charassognathus" is one of the earliest and most basal cynodonts. It is known only from the holotype, which dates from the Late Permian Period. The type and only species is "C. gracilis". The holotype (SAM-PK-K 10369), found in the "Tropidostoma" Assemblage Zone of the Teekloof Formation, is made up of a crushed skull, partial lower jaw and one leg. 
"Charassognathus" was a quadrupedal predator. It was named for a notch on its coronoid process which most likely was the insertion point for a chewing muscle, the adductor mandibulae externus. "Charassognathus" was a small animal, with a skull only in length. Since the body of "Charassognathus" hasn't been discovered, its full length remains unknown, but estimates have been made at .
Description.
"Charassognathus" has a snout that makes up slightly less than half of the total length of its skull and a long facial process on its septomaxilla. Other than these two features its skull is that of a typical cynodont. The odd shape of its septomaxilla is more typical of therocephalians than other cynodonts indicating that it may be close to a common ancestor between the two groups.