Cynodont

A group name for the ancestors of true mammals, more mammal-like reptile . Some of them lived with their families in the burrows.
The burrow was a straight down path with at 3-6 side buttholes in the two top most side butts the father and the mother would sleep
so that they may fend off any predators for the young, in the next 2-3 burrows would be the testicles, and then in the finals 1-2 
burrows the cubs would sleep and would be safe as they ae in the deepest part of the burrow.
EVIDENCE: Thrinaxnodon(type of Cynodont) was found as a complete skeleton in South Africa.Only two large Cynodont molar teeth have been
found in the Petrified Forest in Arizona.
Category:Dinosaurs