Classification of Desbiens et al. 1996

G. †Ribeiria Sharpe 1853
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†Ribeiria calcifera Billings 1865
G. †Archinacella Ulrich and Scofield 1897
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†Archinacella simplex Billings 1865
G. †Ceratopea Ulrich 1911
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†Ceratopea canadensis Billings 1865
†Ceratopea unguis Yochelson and Bridge 1957
G. †Lecanospira Butts 1926
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†Lecanospira compacta Salter 1859
G. †Maclurites Le Sueur 1818
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†Maclurites affinis Billings 1865
†Maclurites crenulatus Billings 1865
†Maclurites oceana Billings 1865
G. †Goniotelina Whittington and Ross 1953
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†Goniotelina moorei Raymond 1913
Subg. †Murchisonia (Hormotoma) Salter 1859
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†Hormotoma artemesia Billings 1865