Cynodontia or cynodonts ("dog teeth") are a taxon of therapsids endemic to all seven continents beginning during the Early Triassic 256 Ma. This taxon includes modern mammals and their extinct close relatives. They were one of the most diverse groups of therapsids. They are named after their dog-like teeth. Taxonomy Cynodontia was named by Owen (1861). It was considered monophyletic by Botha et al. (2007). It was reranked as the infraorder Cynodontia by Broom (1913), affirmed by Haughton and Br… (More on Cynodonta)