[Kingdom] Animalia Linnaeus, 1758 - animals Grade Enterozoa Grade Cœlomata Phylum Appendiculata {Lankester} Branch Gnathopoda Straus-Durkheim, 1829 Grade Condylopoda Class Arachnida Lamarck, 1801 Metarachnæ Order Tardigrada Doyère, 1840 see Phylum Tardigrada Doyère, 1840 Genus Arctiscon Schrank, 1803