organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Domain eukaryotes see Domain Eukaryota Chatton, 1925 opisthokonts see Clade Opisthokonta Cavalier-Smith 1987 [Simpson & Medina 2020] Kingdom Animalia Linnaeus, 1758 - animals Phylum Cnidaria Hatschek, 1888 - cnidarians