Phylum Arthropoda Siebold, 1848 - arthropods
   Subphylum †Artiopoda Hou & Bergström, 1997
     Superclass †Vicissicaudata Ortega-Hernández, Legg & Braddy, 2013
       Order †Aglaspidida Walcott, 1911
         Family †Tremaglaspididae Lerosey-Aubril, Zhu & Ortega-Hernández, 2017
           Genus †Tremaglaspis Fortey & Rushton, 2003 [paraphyletic]
             †Tremaglaspis unite Fortey & Rushton, 2003