[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   [metazoans] Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758
     Phylum Priapulida Delage & Hérouard, 1897 - priapulids
       1 Genus †Cricocosmia Hou & Sun, 1988
       2 Genus †Maotianshania Sun & Hou, 1987 see Genus Ottoia Walcott, 1911
       3 Genus †Ottoia Walcott, 1911
       4 Genus †Selkirkia Walcott, 1911