Arthroaspis Stein, Budd, Peel & Harper, 2013 † (verified source for family)
Conciliterga † (current name source)
Haifengella Zhao, Hu, Zeng & Zhu, 2014 † (verified source for family)
Helmetia Walcott, 1918 † (verified source for family)
Helmetia Walcott, 1918 † (current name source)
Helmetiida † (basis of record)
Helmetiida † (current name source)
Helmetiidae Simonetta & Delle Cave, 1975 † (current name source)
Helmetiidae Simonetta & Delle Cave, 1975 † (basis of record)
Kuamaia Hou, 1987 † (verified source for family)
Kuamaia Hou, 1987 † (current name source)
Pygmaclypeatus Zhang, Han & Shu, 2000 † (verified source for family)
Pygmaclypeatus Zhang, Han & Shu, 2000 † (current name source)
Retifacies Hou, Chen & Lu, 1989 † (verified source for family)
Retifacies Hou, Chen & Lu, 1989 † (current name source)
Rhombicalvaria Hou, 1987 † (current name source)
Rhombicalvaria Hou, 1987 † (verified source for family)
Saperion Hou, Ramskold & Bergström, 1991 † (current name source)
Saperion Hou, Ramskold & Bergström, 1991 † (verified source for family)
Skioldia Hou & Bergström, 1997 † (current name source)
Skioldia Hou & Bergström, 1997 † (verified source for family)
Tegopelte Simonetta & Della Cave, 1975 † (verified source for family)
Tegopelte Simonetta & Della Cave, 1975 † (current name source)
Tegopeltidae Simonetta & Delle Cave, 1975 † (current name source)
Tegopeltidae Simonetta & Delle Cave, 1975 † (basis of record)

 Taxonomic remark

 for Arthroaspis Stein, Budd, Peel & Harper, 2013 †

Previously ascribed to Arthropod incertae sedis, as possible relative of trilobites. Loss et al. (2025) resolved ... [details]