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Sinocalliopteryx gigas, a compsognathid from the Early Cretaceous of the Liaoning Province in China. Known from a complete articulated skeleton, it is the largest compsognathid known reaching a length of 2.5 meters. The fossil also shows trace of "protofeathers" covering the body with longer ones near the ankles. The remains of its last meal, the leg of a small dromeosaurid, was also found in its abdomen.
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I heard that coelurosaurs (or the feathered dinosaurs like the tyrannosaurs, compsognathids, raptors, therizinosaurs, etc.) should be considered a group of birds that are decesendants from proto-birds due to them having feathers. What do you think of this?
No, it's the other way around: birds are considered a group of dinosaurs descending from a group of feathered coelurosaurs, the maniraptorans. Birds and some of these maniraptorans (for instance the group containing Velociraptor) have a common dinosaurian ancestor which might have been capable of flight, making velociraptor only secondarily flightless...
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