Classification of Reed 1909

G. †Hyolithes d'Eichwald 1840
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Subg. †Hyolithes (Orthotheca) Novak 1886
Hyolithes asteroideus Reed 1909
Hyolithes columbanus Reed 1909
Hyolithes girvanensis Reed 1909
Hyolithes immemor Reed 1909
Hyolithes sylvestris Reed 1909
G. †Pterotheca Salter 1853
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Pterotheca simplex Reed 1909