| Nominal Species (n = 113) | Present allocation (n = 42) | Ref. |
|---|---|---|
| Petromyzon adriaticus Nardo, 1847 | Petromyzon marinus | 13696 |
| Ammocoetes aepyptera Abbott, 1860 | Lampetra aepyptera | 12965 |
| Lethenteron alaskense Vladykov & Kott, 1978 | Lethenteron alaskense | 89241 |
| Lampetra alavariensis Mateus, Alves, Quintella & Almeida, 2013 | Lampetra alavariensis | 93552 |
| Petromyzon americanus Lesueur, 1818 | Petromyzon marinus | 12324 |
| Petromyzon anomalum De la Pylaie, 1835 | Lampetra planeri | 13696 |
| Petromyzon appendix DeKay, 1842 | Lethenteron appendix | 89241 |
| Petromyzon argenteus Nardo, 1847 | Lampetra fluviatilis | 13696 |
| Petromyzon argenteus Bloch, 1795 | Lampetra fluviatilis | 13696 |
| Petromyzon argenteus Kirtland, 1838 | Ichthyomyzon bdellium | 27116 |
| Petromyzon astori Girard, 1858 | Entosphenus tridentatus | 27116 |
| Lampetra auremensis Mateus, Alves, Quintella & Almeida, 2013 | Lampetra auremensis | 93552 |
| Ammocoetes aureus Bean, 1881 | Lethenteron camtschaticum | 12321 |
| Petromyzon ayresii Günther, 1870 | Lampetra ayresii | 1998 |
| Petromyzon bairdii Gill, 1883 | Petromyzon marinus | 3154 |
| Petromyzon bdellium Jordan, 1885 | Ichthyomyzon bdellium | 12965 |
| Ammocoetes bicolor Lesueur, 1818 | Petromyzon marinus | 12324 |
| Petromyzon bicolor Shaw, 1804 | Lampetra planeri | 13696 |
| Ammocoetes borealis Agassiz, 1850 | Ichthyomyzon fossor | 27116 |
| Petromyzon borealis Girard, 1858 | Lethenteron camtschaticum | 12321 |
| Petromyzon branchialis Linnaeus, 1758 | Lampetra fluviatilis | 13696 |
| Petromyzon branchialis (non Linnaeus, 1758) | Eudontomyzon mariae | 12283 |
| Petromyzon branchialis (non Linnaeus, 1758) | Lampetra richardsoni | 1998 |
| Petromyzon caecus Couch, 1832 | Lampetra planeri | 13696 |
| Agnathomyzon caspicus Gratzianov, 1907 | Caspiomyzon wagneri | 27116 |
| Ichthyomyzon castaneus Girard, 1858 | Ichthyomyzon castaneus | 5723 |
| Ammocoetes cibarius Girard, 1858 | Lampetra ayresii | 50838 |
| Petromyzon ciliatus Ayres, 1855 | Entosphenus tridentatus | 56787 |
| Ammocoetes communis Gistel, 1848 | Lampetra fluviatilis | 13696 |
| Ammocoetes concolor Kirtland, 1840 | Ichthyomyzon unicuspis | 1998 |
| Petromyzon concolor (non Kirtland, 1840) | Petromyzon marinus | 12324 |
| Eudontomyzon danfordi Regan, 1911 | Eudontomyzon danfordi | 12281 |
| Eudontomyzon danfordi vladykovi Oliva & Zanandrea, 1959 | Eudontomyzon vladykovi | 13696 |
| Petromyzon dentex Anikin, 1905 | Lethenteron kessleri | 12323 |
| Entosphenus epihexodon Gill, 1862 | Entosphenus tridentatus | 89241 |
| Petromyzon ernstii Dybowski, 1872 | Lethenteron camtschaticum | 12321 |
| Petromyzon fluviatilis Linnaeus, 1758 | Lampetra fluviatilis | 3161 |
| Petromyzon fluviatilis f. major Smitt, 1895 | Lampetra fluviatilis | 13696 |
| Lampetra fluviatilis f. praecox Berg, 1932 | Lampetra fluviatilis | 13696 |
| Lampetra fluviatilis ladogensis Ivanova-Berg, 1966 | Lampetra fluviatilis | 13696 |
| Petromyzon fluviatilis larvalis Smitt, 1895 | Lampetra planeri | 13696 |
| Petromyzon fluviatilis minor Smitt, 1895 | Lampetra planeri | 13696 |
| Lampetra fluviatilis typica Berg, 1931 | Lampetra fluviatilis | 26282 |
| Entosphenus folletti Vladykov & Kott, 1976 | Entosphenus folletti | 89241 |
| Ichthyomyzon fossor Reighard & Cummins, 1916 | Ichthyomyzon fossor | 3814 |
| Ichthyomyzon gagei Hubbs & Trautman, 1937 | Ichthyomyzon gagei | 5723 |
| Tetrapleurodon geminis Álvarez, 1964 | Tetrapleurodon geminis | 89241 |
| Lampetra gracilis Kux, 1965 | Eudontomyzon danfordi | 12281 |
| Eudontomyzon graecus Renaud & Economidis, 2010 | Caspiomyzon graecus | 89241 |
| Ichthyomyzon greeleyi Hubbs & Trautman, 1937 | Ichthyomyzon greeleyi | 5723 |
| Eudontomyzon hellenicus Vladykov, Renaud, Kott & Economidis, 1982 | Caspiomyzon hellenicus | 89241 |
| Ichthyomyzon hirudo Girard, 1858 | Ichthyomyzon castaneus | 27116 |
| Entosphenus hubbsi Vladykov & Kott, 1976 | Lampetra hubbsi | 96293 |
| Ichthyomyzon hubbsi Raney, 1952 | Ichthyomyzon greeleyi | 27116 |
| Lampetra japonica septentrionalis Berg, 1931 | Lethenteron camtschaticum | 12321 |
| Petromyzon japonicus Martens, 1868 | Lethenteron camtschaticum | 12321 |
| Petromyzon jurae MacCulloch, 1819 | Lampetra fluviatilis | 13696 |
| Petromyzon kameraticus Dybowski, 1869 | Lethenteron camtschaticum | 13696 |
| Petromyzon kessleri Anikin, 1905 | Lethenteron kessleri | 12323 |
| Petromyzon lamottenii Lesueur, 1827 | Lethenteron appendix | 89241 |
| Petromyzon lampetra Pallas, 1814 | Petromyzon marinus | 13696 |
| Lampetra lanceolata Kux & Steiner, 1972 | Lampetra lanceolata | 89241 |
| Lampetra lethophaga Hubbs, 1971 | Entosphenus lethophagus | 89241 |
| Petromyzon lividus Girard, 1858 | Entosphenus tridentatus | 27116 |
| Petromyzon lumbricalis Pallas, 1814 | Lethenteron camtschaticum | 13696 |
| Lampetra lusitanica Mateus, Alves, Quintella & Almeida, 2013 | Lampetra lusitanica | 93552 |
| Petromyzon macrops Blainville, 1825 | Lampetra fluviatilis | 13696 |
| Lampetra macrostoma Beamish, 1982 | Entosphenus macrostomus | 89241 |
| Petromyzon maculosus Gronow, 1854 | Petromyzon marinus | 12324 |
| Lampetra mariae Berg, 1931 | Eudontomyzon mariae | 12283 |
| Petromyzon marinus Linnaeus, 1758 | Petromyzon marinus | 12324 |
| Petromyzon marinus camtschaticus Tilesius, 1811 | Lethenteron camtschaticum | 13696 |
| Petromyzon marinus dorsatus Wilder, 1883 | Petromyzon marinus | 12324 |
| Petromyzon marinus unicolor Gage, 1928 | Petromyzon marinus | 3154 |
| Lethenteron matsubarai Vladykov & Kott, 1978 | Lethenteron matsubarai | 12323 |
| Lethenteron matsubarai (non Vladykov & Kott, 1978) | Lethenteron kessleri | 12323 |
| Petromyzon maximus Cuvier, 1816 | Petromyzon marinus | 13696 |
| Lethenteron meridionale Vladykov, Kott & Pharand-Coad, 1975 | Lampetra aepyptera | 10294 |
| Lampetra minima Bond & Kan, 1973 | Entosphenus minimus | 89241 |
| Lampetra minor Grossinger, 1794 | Eudontomyzon danfordi | 13696 |
| Lampetra mitsukurii Hatta, 1901 | Lethenteron reissneri | 26282 |
| Lampetra mitsukurii major Hatta, 1911 | Lethenteron camtschaticum | 12321 |
| Lampetra mitsukurii minor Hatta, 1911 | Lethenteron reissneri | 26282 |
| Lampetra morii Berg, 1931 | Eudontomyzon morii | 89241 |
| Petromyzon niger Lacepède, 1802 | Lampetra planeri | 13696 |
| Petromyzon nigricans Lesueur, 1818 | Petromyzon marinus | 12324 |
| Petromyzon nigrum Rafinesque, 1820 | Ichthyomyzon bdellium | 27116 |
| Lethenteron ninae Naseka, Tuniyev & Renaud, 2009 | Lethenteron ninae | 82201 |
| Petromyzon omalii Beneden, 1857 | Lampetra fluviatilis | 12285 |
| Lampetra opisthodon Gratzianov, 1907 | Lampetra fluviatilis | 13696 |
| Lampetra pacifica Vladykov, 1973 | Lampetra pacifica | 89241 |
| Petromyzon planeri Bloch, 1784 | Lampetra planeri | 12315 |
| Petromyzon plumbeus Shaw, 1804 | Lampetra planeri | 13696 |
| Petromyzon plumbeus Ayres, 1855 | Lampetra ayresii | 1998 |
| Petromyzon ponticus Yashchenko, 1896 | Eudontomyzon mariae | 13696 |
| Petromyzon pricka Lacepède, 1798 | Lampetra fluviatilis | 13696 |
| Petromyzon reissneri Dybowski, 1869 | Lethenteron reissneri | 13397 |
| Lampetra richardsoni Vladykov & Follett, 1965 | Lampetra richardsoni | 3814 |
| Petromyzon ruber Lacepède, 1800 | Petromyzon marinus | 13696 |
| Petromyzon sanguisuga Lacepède, 1800 | Lampetra fluviatilis | 13696 |
| Petromyzon septoeuil Lacepède, 1802 | Lampetra planeri | 13696 |
| Entosphenus similis Vladykov & Kott, 1979 | Entosphenus similis | 89241 |
| Lampetra spadicea Bean, 1887 | Tetrapleurodon spadiceus | 89241 |
| Petromyzon tridentatus Richardson, 1836 | Entosphenus tridentatus | 26282 |
| Ammocoetes unicolor DeKay, 1842 | Ichthyomyzon fossor | 26282 |
| Ichthyomyzon unicuspis Hubbs & Trautman, 1937 | Ichthyomyzon unicuspis | 86798 |
| Lampetra variegata Tilesius, 1811 | Lethenteron camtschaticum | 13696 |
| Eudontomyzon vladykovi stankokaramani Karaman, 1974 | Eudontomyzon stankokaramani | 13696 |
| Eudontomyzon vladykovi stankokaramani (non Karaman, 1974) | Eudontomyzon mariae | 13696 |
| Petromyzon wagneri Kessler, 1870 | Caspiomyzon wagneri | 4537 |
| Lampetra wilderi Gage, 1896 | Lethenteron appendix | 86798 |
| Oceanomyzon wilsoni Fowler, 1908 | Petromyzon marinus | 12324 |
| Lampetra zanandreai Vladykov, 1955 | Lethenteron zanandreai | 89241 |