abstract:Pygostyle refers to a number of the final few caudal vertebrae fused into a single ossification, supporting the tail feathers and musculature. In modern birds, the rectrices attach to these.
On the other hand, Confuciusornis, which possessedthe firstbeakandearliestpygostyle, or fusedtail vertebrae that supportedfeathers, truly looks like a bird.
