metazoans Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758 Bilateria Hatschek, 1888 - bilaterians see Subkingdom Bilateria Hatschek, 1888 Phylum Arthropoda Siebold, 1848 - arthropods ?Genus †[Archaeaspinus] Ivantsov, 2007 1 †Archaeaspinus fedonkini (Ivantsov, 2001)