The fossilised skin of "Carnotaurus" (an abelisaurid and therefore not a coelurosaur) shows an unfeathered, reptile-like skin with rows of bumps, but the conclusion that "Carnotaurus" was necessarily featherless has been criticized as the impressions do not cover the whole body, being found only in the lateral region but not the dorsum. An adult "Carnotaurus" weighed about 2 tonnes, and mammals of this size and larger have either very short, sparse hair or naked skins, so perhaps the skin of "Carnotaurus" tells us nothing about whether smaller non-coelurosaurian theropods had feathers. The tyrannosauroid "Yutyrannus" is known to have possessed feathers and weighed 1.1 tonne.