T1H4E1R1A1P3S1I1D2S1
16 points
THERAPSIDS is validvalid
THERAPSID,
THERAPSID, one of a group of Permian and Jurassic reptiles considered to be direct ancestors of mammals
THERAPSID,
THERAPSID, one of a group of Permian and Jurassic reptiles considered to be direct ancestors of mammals