Classification of the family Petromyzontidae
Fm. Petromyzontidae [lamprey]
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G. Agnathomyzon Gracianov 1906
G. Bathymyzon Gill 1883
G. Haploglossa Gracianov 1906
Subfm. Lampetrinae
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G. Caspiomyzon Berg 1906
G. Entosphenus Gill 1862
G. Eudontomyzon Regan 1911
G. Lampetra Gray 1851
G. Lethenteron Creaser and Hubbs 1922
G. Tetrapleurodon Creaser and Hubbs 1922
G. Lampreda Rafinesque 1815
G. Oceanomyzon Fowler 1908
G. Okkelbergia Creaser and Hubbs 1922
G. Pricus Rafinesque 1815
G. Reighardina Creaser and Hubbs 1922
G. Scolecosoma Girard 1859