Exaeretodon is an extinct genus of fairly large, low-slung traversodontid cynodonts from the southern parts of Pangea.

E. argentinus is from the Carnian-age (Late Triassic) Cancha de Bochas Member of the Ischigualasto Formation in the Ischigualasto-Villa Unión Basin in northwestern Argentina.

E. major and E. riograndensis are from the Carnian-age portion of the Santa Maria Formation of the Paraná Basin in southeastern Brazil.

[2] When he first named the species, Argentine paleontologist José Bonaparte mentioned several features that distinguish it from all other traversodontids.

The tooth rows of the upper jaw are more parallel to each other in Ischignathus sudamericanus than they are in Exaeretodon, and they are also inset closer to the inside of the mouth.