Coelurosauria is the clade containing all theropod dinosaurs more closely related to birds than to carnosaurs.
This is a varied group that includes tyrannosaurs, ornithomimosaurs, compsognathids and maniraptors; Maniraptora includes birds, the only descendents of coelurosaurs alive today.
All Paraves discovered so far have been coelurosaurs. It is probable that all coelurosaurs were feathered.
Some diagnostic characteristics of coelurosaurs include elongated arms and well-developed hinge-like ankles (possible rotation of the ankle is reduced, which is helpful during locomotion). These features may be lost or modified by later coelurosaurs (birds, for example).