[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 Arthropoda Siebold, 1848 - arthropods Class †Trilobita Walch, 1771 - trilobites Genus †Otekmaspis