(C) The $Columella auris$ is a bone found in the middle ear of amphibians, reptiles, and birds. It is homologous to the $stapes$ bone found in the mid

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(C) The $Columella auris$ is a bone found in the middle ear of amphibians, reptiles, and birds. It is homologous to the $stapes$ bone found in the middle ear of mammals. Embryologically and evolutionarily, the $Columella auris$ is derived from the $hyomandibular$ bone of the fish skull. Therefore, it is a modified $hyomandibular$.