Classification of the genus Leiorhynchus
G. †Leiorhynchus Hall 1860
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Subg. †Leiorhynchus (Leiorhynchus) Hall 1860
†Leiorhynchus quadricostatus Vanux 1842
†Leiorhynchus ripheicus Stepanov 1948
†Leiorhynchus rockymontana Marcou 1858
†Leiorhynchus rockymontanum Marcou 1858
†Rhynchonella (Leiorhynchus) laura Billings 1860
†Rhynchonella (Leiorhynchus) nevadensis Walcott 1884
†Rhynchonella (Leiorhynchus) sinuatus Hall 1867
Invalid names: Nudirostra [objective synonym]