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
           1 Genus †Flobertia Hesselbo, 1992
           2.1 Genus †Cyclopites Raasch, 1939
           2.2.1 Genus †Chlupacaris Van Roy, 2006
           2.2.2.1 Genus †Quasimodaspis Waggoner, 2003
           2.2.2.2.1 Genus †Tremaglaspis Fortey & Rushton, 2003 [paraphyletic]
           2.2.2.2.1.n Genus †Brachyaglaspis Ortega-Hernández et al.