Coelurosauria

Coelurosauria /sɨˌljʊərəˈsɔriə/ (from Greek, meaning "hollow tailed lizards") is the clade containing all theropod dinosaurs more closely related to birds than to carnosaurs. Coelurosauria is a subgroup of theropod dinosaurs that includes compsognathids, tyrannosaurs, ornithomimosaurs, and maniraptorans; Maniraptora includes birds, the only dinosaur group alive today.[3] Most feathered dinosaurs discovered so far have been coelurosaurs; Philip J. Currie considers it probable that all coelurosaurs were feathered.[4] In the past, Coelurosauria was used to refer to all small theropods, although this classification has been abolished.

For example Dilong It is a small theropod