Wikipedia:

Exaeretodon

Summary:

a genus of traversodontid cynodont; several species are known, from various formations. E. argentinus, E. frenguelli, and E. vincei are from the Carnian-age Ischigualasto Formation of Argentina. E. major and E. riograndensis are from the Ladinian-age ...  (36 of 277 words, 1 image)

Link:

http://en.wikipedia.org/wiki/Exaeretodon  [cite]

Britannica:

cynodont | or infraorder Cynodontia [suborder]

Summary:

mammal-like reptiles of the order Therapsida that existed from the Late Permian to the Early Jurassic Epoch. Cynodont fossils have been found in ...  (23 of 101 words)

Link:

http://www.britannica.com/EBchecked/topic/148447/cynodont  [cite]