1) Genus exaeretodon 2) Reptile genus 
Exaeretodon is a genus of traversodontid cynodont; several species are known, from various formations. E. argentinus, E. frenguelli, and E. vincei are from the Carnian-age (Upper Triassic) Ischigualasto Formation of Argentina. E. major and E. riograndensis are from the Ladinian-age (Middle Triassic) portion of the Santa Maria Formation of Brazil. ...
[n] - a genus of reptiles of the division Cynodontia
genus Exaeretodon noun a genus of reptiles of the division Cynodontia