"Avifiloplumans"@en . . . . . . . "Avifilopluma (\"bird filoplumes\") is a clade containing all animals with feathers. Unlike most clades, which are defined based on relative relationships, Avifilopluma is defined based on an apomorphy, that is, a unique physical characteristic shared by one group and not found outside that group (in this case, feathers)."@en . . "* Avipluma (Clarke et al., 2004)" .