[Bilateria] Hatschek, 1888 - bilaterians
see Subkingdom Bilateria Hatschek, 1888
ecdysozoans
see Clade Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake 1997, nom. cl. inval.
Arthropoda Siebold, 1848 - arthropods
Arachnomorpha Heider, 1913
†Trilobitomorpha Størmer, 1944
see Superclass Trilobitomorpha Størmer, 1944
Class †Marrellomorpha Beurlen, 1934
Order †Marrellida Raymond, 1935
1 Genus †Mimetaster Gürich, 1932
2 Genus †Marrella Walcott, 1912 - lace crab