1. Species Petromyzon marinus Linnaeus, 1758
2. Species Petromyzon acutidens Philippi, 1865 accepted as Mordacia lapicida (Gray, 1851) (synonym)
3. Species Petromyzon adriaticus Nardo, 1847 accepted as Petromyzon marinus Linnaeus, 1758 (possibly a synonym)
4. Species Petromyzon americanus Lesueur, 1818 accepted as Petromyzon marinus Linnaeus, 1758 (synonym)
5. Species Petromyzon anwandteri Philippi, 1863 accepted as Mordacia lapicida (Gray, 1851) (synonym)
6. Species Petromyzon argenteus Bloch, 1795 accepted as Lampetra fluviatilis (Linnaeus, 1758) (synonym)
7. Species Petromyzon argenteus Nardo, 1847 accepted as Lampetra fluviatilis (Linnaeus, 1758) (unaccepted > junior homonym, possibly a synonym)
8. Species Petromyzon astori Girard, 1858 accepted as Entosphenus tridentatus (Richardson, 1836) (synonym)
9. Species Petromyzon ayresii Günther, 1870 accepted as Lampetra ayresii (Günther, 1870) accepted as Occidentis ayresii (Günther, 1870) (synonym)
10. Species Petromyzon bairdii Gill, 1883 accepted as Petromyzon marinus Linnaeus, 1758 (synonym)
11. Species Petromyzon borealis Girard, 1858 accepted as Lethenteron camtschaticum (Tilesius, 1811) (synonym)
12. Species Petromyzon branchialis Linnaeus, 1758 accepted as Lampetra fluviatilis (Linnaeus, 1758) (synonym)
13. Species Petromyzon ciliatus Ayres, 1855 accepted as Entosphenus tridentatus (Richardson, 1836) (synonym)
14. Species Petromyzon cirrhatus Forster, 1801 accepted as Eptatretus cirrhatus (Forster, 1801)
15. Species Petromyzon concolor (Kirtland, 1840) accepted as Ammocoetes concolor Kirtland, 1840 accepted as Ichthyomyzon unicuspis Hubbs & Trautman, 1937 (possibly a synonym)
16. Species Petromyzon epihexodon (Gill, 1862) accepted as Entosphenus tridentatus (Richardson, 1836)
17. Species Petromyzon ernstii Dybowski, 1872 accepted as Lethenteron camtschaticum (Tilesius, 1811) (synonym)
18. Species Petromyzon fluvialis Linnaeus, 1758 accepted as Lethenteron camtschaticum (Tilesius, 1811) (unaccepted > misapplication, also misspelling)
19. Species Petromyzon fluviatilis Linnaeus, 1758 accepted as Lampetra fluviatilis (Linnaeus, 1758) (synonym)
20. Species Petromyzon fonki Philippi, 1865 accepted as Geotria australis Gray, 1851 (synonym)
21. Species Petromyzon japonicus Martens, 1868 accepted as Lethenteron camtschaticum (Tilesius, 1811) (synonym)
22. Species Petromyzon jurae MacCulloch, 1819 accepted as Lampetra fluviatilis (Linnaeus, 1758) (synonym)
23. Species Petromyzon kameraticus Dybowski, 1869 accepted as Lethenteron camtschaticum (Tilesius, 1811) (unaccepted > unavailable name)
24. Species Petromyzon lampetra Pallas, 1814 accepted as Petromyzon marinus Linnaeus, 1758 (synonym)
25. Species Petromyzon lividus Girard, 1858 accepted as Entosphenus tridentatus (Richardson, 1836) (synonym)
26. Species Petromyzon lumbricalis Pallas, 1814 accepted as Lethenteron camtschaticum (Tilesius, 1811) (synonym)
27. Species Petromyzon macrops Blainville, 1825 accepted as Lampetra fluviatilis (Linnaeus, 1758) (possibly a synonym)
28. Species Petromyzon macrostomus Burmeister, 1868 accepted as Geotria macrostoma (Burmeister, 1868) (synonym)
29. Species Petromyzon maculosus Gronow, 1854 accepted as Petromyzon marinus Linnaeus, 1758 (synonym)
30. Species Petromyzon maximus Linnaeus, 1758 accepted as Petromyzon marinus Linnaeus, 1758 (unaccepted > misspelling - incorrect subsequent spelling)
31. Species Petromyzon mordax Richardson, 1846 accepted as Mordacia mordax (Richardson, 1846)
32. Species Petromyzon nigricans Lesueur, 1818 accepted as Petromyzon marinus Linnaeus, 1758 (synonym)
33. Species Petromyzon omalii Beneden, 1857 accepted as Lampetra fluviatilis (Linnaeus, 1758) (synonym)
34. Species Petromyzon onki Philippi, 1865 accepted as Geotria australis Gray, 1851 (misspelling)
35. Species Petromyzon plumbeus Ayres, 1855 accepted as Lampetra ayresii (Günther, 1870) accepted as Occidentis ayresii (Günther, 1870) (unaccepted > junior homonym)
36. Species Petromyzon pricka Lacepède, 1798 accepted as Lampetra fluviatilis (Linnaeus, 1758) (unaccepted > unavailable name, not latinized)
37. Species Petromyzon sanguisuga Lacepède, 1800 accepted as Lampetra fluviatilis (Linnaeus, 1758) (synonym)
38. Species Petromyzon tridentatus Richardson, 1836 accepted as Entosphenus tridentatus (Richardson, 1836) (synonym)
39. Species Petromyzon wagneri Kessler, 1870 accepted as Caspiomyzon wagneri (Kessler, 1870) (synonym)
40. Species Petromyzon ruber Lacepède, 1800 accepted as Petromyzon marinus Linnaeus, 1758 (uncertain > nomen dubium, possibly a synonym)

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