Repenomamus robustus (Li et al. 2001) Repenomamus giganticus (Hu et al. 2005; early Cretaceous 125 mya; 1m) is traditionally considered a non-therian gobiconodontid mammal, but it nests with Pachygenelus and tritylodontids, like Oligokyphus, as a stem-mammal in the large reptile tree. Both were among the largest pre-mammals in the Mesozoic. The smaller R. robustus had a juvenile psittacosaur in its belly.

Repenosaurus had a longer torso and shorter limbs. The clavicle is robust here. The coracoid was retained. Perhaps it could climb well, but the manus and pes are poorly preserved. The canines are reduced. The dentary rises anteriorly. It has epipubic bones.

Hu Y, Meng J, Wang Y-Q and Li C-K 2005. Large Mesozoic mammals fed on young dinosaurs. Nature 433:149-152.

Li J-L, Wang Y, Wang Y-Q and Li C-K 2001. A new family of primitive mammal from the Mesozoic of western Liaoning, China. Chinese Science Bulletin 46(9):782-785.

wiki/Repenomamus