Classification of the order Petromyzontiformes

Or. Petromyzontiformes Berg 1940 [lamprey]
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G. †Euphanerops Woodward 1900
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†Euphanerops longaevus Woodward 1900
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G. Caragola Gray 1851
G. Chilopterus Philippi 1858
G. Exomegas Burmeister 1868
G. Geotria Gray 1851
G. Macropthalmia Plate 1897
G. Neomordacia Castelnau 1872
G. Thysanochilus Philippi 1857
G. Velasia Gray 1851
G. Yarra Castelnau 1872
Fm. †Hardistiellidae Halstead 1993
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G. †Hardistiella Janvier and Lund 1983
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†Hardistiella montanensis Janvier and Lund 1983
G. †Mayomyzon Bardack and Zangerl 1968
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†Mayomyzon pieckoensis Bardack and Zangerl 1968
G. †Mesomyzon Chang et al. 2006
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†Mesomyzon mengae Chang et al. 2006
Fm. Mordaciidae Gill 1893
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G. Mordacia Gray 1851
Fm. Petromyzontidae [lamprey]
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G. Agnathomyzon Gracianov 1906
G. Bathymyzon Gill 1883
G. Haploglossa Gracianov 1906
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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
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G. Ichthyomyzon Girard 1859
G. Petromyzon Linnaeus 1758
G. Pricus Rafinesque 1815
G. Reighardina Creaser and Hubbs 1922
G. Scolecosoma Girard 1859
G. †Priscomyzon Gess et al. 2006
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†Priscomyzon riniensis Gess et al. 2006
Invalid names: Hyperoartii [synonym], Mayomyzontidae Bardack and Zangerl 1971 [empty]