Phylum Arthropoda Siebold, 1848 - arthropods
   1 Genus †Fortiforceps Hou & Bergström, 1997
   2.1.1 Genus †Haikoucaris Chen, Waloszek & Maas, 2004
   2.1.2.1 Genus †Leanchoilia Walcott, 1912
   2.1.2.2 Genus †Alalcomenaeus Simonetta, 1970
   2.2.1 Genus †Weinbergina Richter & Richter, 1929
   2.2.2.1.1 Genus †Burgessia Walcott, 1912
   2.2.2.1.2.1.1 Genus †Mimetaster Gürich, 1932
   2.2.2.1.2.1.2 Genus †Marrella Walcott, 1912 - lace crab
   2.2.2.1.2.2.1 Genus †Martinssonia Müller & Walossek, 1986
   2.2.2.1.2.2.2.1 Genus Nebalia Leach, 1814
   2.2.2.1.2.2.2.2 Genus †Rebachiella
   2.2.2.2 Subphylum †Artiopoda Hou & Bergström, 1997