Coelurosaurs

Coelurosaurs, or coelurosaurians, are dinosaurs in the clade Coelurosauria ( meaning "hollow tailed lizards") containing all theropod dinosaurs more closely related to birds than to carnosaurs.

This subgroup of theropod dinosaurs include compsognathids, tyrannosaurs, ornithomimosaurs, and maniraptorans; which includes birds: the only known dinosaur group alive today.

Most feathered dinosaurs discovered so far have been coelurosaurs. Philip J. Currie had considered it likely and probable that all coelurosaurs were feathered. However, several skin impressions found for some members of this group show pebbly, scaly skin; indicating feathers didn't completely replace scales in all taxa. In the past, Coelurosauria was used to refer to all small theropods, but this classification has since been abolished.