Bridgeites atlanticus (FOSSIL) (Billings, 1865 †)
Bridgeites discoideus (FOSSIL) Flower, 1968 †
Bridgeites disjuncta (FOSSIL) (Billings, 1865 †)
Bridgeites planidorsalis (FOSSIL) (Cullison, 1944 †)
Bridgeites supraconvexa (FOSSIL) (Cullison, 1944 †)
Bridgeites volutatus (FOSSIL) (R.P. Whitfield, 1886 †)
Calaurops canadensis (FOSSIL) (Billings, 1861 †)
Calaurops lituiformis (FOSSIL) R.P. Whitfield, 1886 †
Ceratopea arabella (FOSSIL) (Billings, 1865 †)
Ceratopea buttsi (FOSSIL) E.L. Yochelson & Bridge,1957 †
Ceratopea canadensis (FOSSIL) (Billings, 1865 †)
Ceratopea compressum (FOSSIL) (R.P. Whitfield, 1886 †)
Ceratopea depressa (FOSSIL) (Butts, 1926 †)
Ceratopea grandis (FOSSIL) (Butts, 1926 †)
Ceratopea hami (FOSSIL) E.L. Yochelson & Bridge,1957 †
Ceratopea harpya (FOSSIL) (Billings, 1865 †)
Ceratopea inflata (FOSSIL) Cullison, 1944 †
Ceratopea kawasakii (FOSSIL) (T. Kobayashi, 1930 †)
Ceratopea keithi (FOSSIL) Ulrich, 1911 †
Ceratopea latiumbilicata (FOSSIL) (C.M. Poulsen, 1927 †)
Ceratopea laurentina (FOSSIL) (Billings, 1859 †)
Ceratopea lemonei (FOSSIL) (Flower, 1968 †)
Ceratopea lenticularis (FOSSIL) (Flower, 1968 †)
Ceratopea medfraensis (FOSSIL) (Rohr & Blodgett, 1988 †)
Ceratopea miser (FOSSIL) (Billings, 1859 †)
Ceratopea numeria (FOSSIL) (Billings, 1865 †)
Ceratopea obtusa (FOSSIL) (Cleland, 1900 †)
Ceratopea parva (FOSSIL) Stauffer, 1937 †
Ceratopea pygmaea (FOSSIL) Stauffer, 1937 †
Ceratopea sculpta (FOSSIL) (Cullison, 1944 †)
Ceratopea sinclairensis (FOSSIL) O. Kobayashi, 1955 †
Ceratopea unguis (FOSSIL) E.L. Yochelson & Bridge,1957 †
Ceratopea vagrans (FOSSIL) (Billings, 1865 †)
Ceratopea wisei (FOSSIL) Fix, 1975 †
Orospira bigranosa (FOSSIL) Butts, 1926 †
Orospira conica (FOSSIL) Cullison, 1944 †
Orospira depressa (FOSSIL) Cullison, 1944 †
Orospira elegantula (FOSSIL) Cullison, 1944 †
Orospira elevata (FOSSIL) Cullison, 1944 †