| albania | | eudontomyzon graecus | species | 2 | 0 |
| australia | | geotria australis | species | 2 | 0 |
| australia | | mordacia mordax | species | 1 | 0 |
| australia | new south wales | mordacia mordax | species | 1 | 0 |
| australia | new south wales | mordacia praecox | species | 8 | 0 |
| australia | south australia | geotria australis | species | 1 | 0 |
| australia | south australia | mordacia mordax | species | 2 | 0 |
| australia | victoria | geotria australis | species | 3 | 0 |
| australia | victoria | mordacia mordax | species | 6 | 0 |
| australia | western australia | geotria australis | species | 4 | 0 |
| austria | | eudontomyzon mariae | species | 3 | 0 |
| austria | | lampetra planeri | species | 5 | 0 |
| austria | lower austria | eudontomyzon mariae | species | 4 | 0 |
| austria | styria | eudontomyzon mariae | species | 14 | 0 |
| austria | tyrol | eudontomyzon mariae | species | 2 | 0 |
| austria | upper austria | eudontomyzon mariae | species | 2 | 0 |
| austria | upper austria | lampetra planeri | species | 10 | 0 |
| bosnia and herzegovina | | lampetra soljani | species | 3 | 0 |
| canada | | lampetra alaskensis | species | 9 | 0 |
| canada | | lampetra appendix | species | 1 | 0 |
| canada | | lethenteron camtschaticum | species | 12 | 0 |
| canada | | petromyzon marinus | species | 1 | 0 |
| canada | manitoba | ichthyomyzon fossor | species | 1 | 0 |
| canada | northwest territories | lethenteron camtschaticum | species | 1 | 0 |
| canada | nova scotia | petromyzon marinus | species | 2 | 0 |
| canada | ontario | lampetra appendix | species | 1 | 0 |
| canada | ontario | petromyzon marinus | species | 0 | 1 |
| canada | ontario | sea lampreys | species | 0 | 1 |
| canada | quebec | lampetra appendix | species | 4 | 0 |
| canada | quebec | petromyzon marinus | species | 6 | 0 |
| china | | eudontomyzon morii | species | 9 | 0 |
| china | | lethenteron camtschaticum | species | 36 | 0 |
| china | | lethenteron reissneri | species | 4 | 0 |
| china | liaoning | eudontomyzon morii | species | 2 | 0 |
| china | liaoning | lethenteron reissneri | species | 73 | 0 |
| czech republic | | lampetra planeri | species | 1 | 0 |
| denmark | | lampetra planeri | species | 1 | 0 |
| georgia | | lethenteron ninae | species | 5 | 0 |
| georgia | abkhazia | lethenteron ninae | species | 1 | 0 |
| georgia | mtskheta-mtianeti region | lethenteron ninae | species | 1 | 0 |
| germany | | lampetra fluviatilis | species | 22 | 0 |
| germany | | lampetra planeri | species | 10 | 0 |
| germany | | petromyzon marinus | species | 8 | 0 |
| germany | baden-wuerttemberg | petromyzon marinus | species | 5 | 0 |
| germany | bavaria | lampetra planeri | species | 5 | 0 |
| germany | bavaria | lampetra sp. | species | 2 | 0 |
| germany | brandenburg | lampetra fluviatilis | species | 80 | 0 |
| germany | hamburg | lampetra fluviatilis | species | 11 | 0 |
| greece | | eudontomyzon hellenicus | species | 7 | 0 |
| ireland | | lampetra planeri | species | 2 | 0 |
| italy | | lampetra planeri | species | 175 | 0 |
| italy | | lethenteron zanandreai | species | 8 | 0 |
| italy | umbria region | lampetra planeri | species | 9 | 0 |
| japan | | lethenteron camtschaticum | species | 18 | 0 |
| japan | | lethenteron reissneri | species | 5 | 0 |
| japan | | lethenteron sp. n | species | 4 | 0 |
| japan | aomori prefecture | lethenteron sp. n | species | 5 | 0 |
| japan | chiba prefecture | lethenteron reissneri | species | 1 | 0 |
| japan | chiba prefecture | lethenteron sp. n | species | 6 | 0 |
| japan | fukuoka prefecture | lethenteron reissneri | species | 1 | 0 |
| japan | fukushima prefecture | lethenteron sp. n | species | 9 | 0 |
| japan | hokkaido prefecture | lethenteron camtschaticum | species | 6327 | 0 |
| japan | hokkaido prefecture | lethenteron kessleri | species | 3 | 0 |
| japan | hokkaido prefecture | lethenteron reissneri | species | 2 | 0 |
| japan | kyoto prefecture | lethenteron reissneri | species | 1 | 0 |
| japan | mie prefecture | lethenteron sp. n | species | 1 | 0 |
| japan | niigata prefecture | lethenteron camtschaticum | species | 2 | 0 |
| japan | niigata prefecture | lethenteron japonicum | species | 1 | 0 |
| japan | shiga prefecture | lethenteron reissneri | species | 1 | 0 |
| japan | toyama prefecture | lethenteron reissneri | species | 17 | 0 |
| japan | toyama prefecture | lethenteron sp. n | species | 17 | 0 |
| japan | yamagata prefecture | lethenteron camtschaticum | species | 2 | 0 |
| japan | yamagata prefecture | lethenteron sp. n | species | 1 | 0 |
| latvia | | lampetra planeri | species | 1 | 0 |
| lithuania | | lampetra fluviatilis | species | 3 | 0 |
| lithuania | | lampetra planeri | species | 1 | 0 |
| macedonia | ohrid municipality | eudontomyzon stankokaramani | species | 7 | 0 |
| mexico | michoacan ocampo | lampetra geminis | species | 2 | 0 |
| mongolia | | lethenteron kessleri/reissneri | species | 2 | 0 |
| new zealand | | geotria australis | species | 1 | 0 |
| portugal | aveiro district | lampetra alavariensis | species | 1 | 0 |
| portugal | coimbra district | lampetra planeri | species | 2 | 0 |
| portugal | porto district | lampetra planeri | species | 2 | 0 |
| portugal | setubal district | lampetra lusitanica | species | 6 | 0 |
| russia | | eudontomyzon mariae | species | 74 | 0 |
| russia | | eudontomyzon sp. 'dnieper' | species | 29 | 0 |
| russia | | lampetra fluviatilis | species | 2 | 0 |
| russia | | lampetra planeri | species | 2 | 0 |
| russia | | lethenteron camtschaticum | species | 4 | 0 |
| russia | | lethenteron kessleri | species | 3 | 0 |
| russia | | lethenteron kessleri/reissneri | species | 6 | 0 |
| russia | | lethenteron ninae | species | 2 | 0 |
| russia | | lethenteron reissneri | species | 6 | 0 |
| russia | kamchatka krai | lethenteron camtschaticum | species | 452 | 0 |
| russia | khabarovsk krai | lethenteron kessleri | species | 1 | 0 |
| russia | magadan oblast | lethenteron camtschaticum | species | 1 | 0 |
| russia | sakhalin oblast | lethenteron camtschaticum | species | 4 | 0 |
| russia | sakhalin oblast | lethenteron kessleri | species | 1 | 0 |
| slovakia | zilina region | eudontomyzon mariae | species | 3 | 0 |
| slovenia | | eudontomyzon stankokaramani | species | 1 | 0 |
| south korea | | lethenteron reissneri | species | 1 | 0 |
| spain | | lampetra planeri | species | 1 | 0 |
| sweden | | lampetra fluviatilis | species | 4 | 0 |
| sweden | | lampetra planeri | species | 4 | 0 |
| sweden | | petromyzon marinus | species | 4 | 0 |
| turkey | | eudontomyzon lanceolata | species | 3 | 0 |
| turkey | rize province | eudontomyzon lanceolata | species | 0 | 1 |
| turkey | sakarya province | eudontomyzon lanceolata | species | 2 | 0 |
| turkmenistan | | caspiomyzon wagneri | species | 4 | 0 |
| united kingdom | | lampetra planeri | species | 2 | 0 |
| united kingdom | england | lampetra planeri | species | 3 | 0 |
| united states | | entosphenus hubbsi | species | 1 | 0 |
| united states | | ichthyomyzon gagei | species | 2 | 0 |
| united states | | lampetra aepyptera | species | 17 | 0 |
| united states | | lampetra alaskensis | species | 8 | 0 |
| united states | | lampetra appendix | species | 76 | 0 |
| united states | | lampetra sp. green_l17 | species | 1 | 0 |
| united states | | lampetra sp. nisqually_l12 | species | 1 | 0 |
| united states | | lampetra sp. nisqually_l13 | species | 1 | 0 |
| united states | | lampetra sp. nisqually_l14 | species | 1 | 0 |
| united states | | lampetra sp. nisqually_l15 | species | 1 | 0 |
| united states | | lampetra sp. nisqually_l2 | species | 1 | 0 |
| united states | | lampetra sp. nisqually_l29 | species | 1 | 0 |
| united states | | lampetra sp. nisqually_l3 | species | 1 | 0 |
| united states | | lampetra sp. nisqually_l32 | species | 1 | 0 |
| united states | | lampetra sp. nisqually_l33 | species | 1 | 0 |
| united states | | lampetra sp. nisqually_l39 | species | 1 | 0 |
| united states | | lampetra sp. nisqually_l4 | species | 1 | 0 |
| united states | | lampetra sp. nisqually_l5 | species | 1 | 0 |
| united states | | lampetra sp. nooksack_l31 | species | 1 | 0 |
| united states | | lampetra sp. puyallup_l21 | species | 1 | 0 |
| united states | | lampetra sp. puyallup_l27 | species | 1 | 0 |
| united states | | lampetra sp. puyallup_l34 | species | 1 | 0 |
| united states | | lampetra sp. skagit_l20 | species | 1 | 0 |
| united states | | lampetra sp. skagit_l22 | species | 1 | 0 |
| united states | | lampetra sp. snoqualmie_l30 | species | 1 | 0 |
| united states | | lampetra sp. tahuya_l24 | species | 1 | 0 |
| united states | | lampetra sp. tahuya_l25 | species | 1 | 0 |
| united states | | lampetra sp. tahuya_l26 | species | 1 | 0 |
| united states | | lampetra tridentata | species | 13 | 0 |
| united states | | lethenteron camtschaticum | species | 4 | 0 |
| united states | | petromyzon marinus | species | 4 | 0 |
| united states | alabama | ichthyomyzon castaneus | species | 5 | 0 |
| united states | alabama | ichthyomyzon gagei | species | 3 | 0 |
| united states | alabama | lampetra aepyptera | species | 9 | 0 |
| united states | alaska | lampetra alaskensis | species | 3 | 0 |
| united states | alaska | lethenteron camtschaticum | species | 7 | 0 |
| united states | arkansas | ichthyomyzon castaneus | species | 4 | 0 |
| united states | arkansas | ichthyomyzon unicuspis | species | 2 | 0 |
| united states | arkansas | lampetra appendix | species | 1 | 0 |
| united states | california | entosphenus hubbsi | species | 4 | 0 |
| united states | california | entosphenus lethophagus | species | 1 | 0 |
| united states | california | entosphenus similis | species | 2 | 0 |
| united states | california | lampetra richardsoni | species | 2 | 0 |
| united states | california | lampetra sp. jb-2003 | species | 1 | 0 |
| united states | california | lampetra tridentata | species | 2 | 0 |
| united states | california | petromyzontiformes sp. bold:aaf0347 | species | 1 | 0 |
| united states | georgia | ichthyomyzon gagei | species | 2 | 0 |
| united states | georgia | lampetra aepyptera | species | 2 | 0 |
| united states | indiana | lampetra aepyptera | species | 2 | 0 |
| united states | kentucky | ichthyomyzon bdellium | species | 2 | 0 |
| united states | kentucky | ichthyomyzon greeleyi | species | 8 | 0 |
| united states | kentucky | lampetra aepyptera | species | 7 | 0 |
| united states | kentucky | petromyzontiformes sp. bold:aac6845 | species | 1 | 0 |
| united states | louisiana | ichthyomyzon gagei | species | 5 | 0 |
| united states | maryland | lampetra aepyptera | species | 3 | 0 |
| united states | maryland | lampetra appendix | species | 2 | 0 |
| united states | maryland | petromyzon marinus | species | 14 | 0 |
| united states | michigan | ichthyomyzon castaneus | species | 5 | 0 |
| united states | michigan | ichthyomyzon fossor | species | 2 | 0 |
| united states | michigan | ichthyomyzon unicuspis | species | 2 | 0 |
| united states | michigan | lampetra appendix | species | 2 | 0 |
| united states | michigan | petromyzon marinus | species | 1 | 3 |
| united states | michigan | sea lampreys | species | 0 | 1 |
| united states | minnesota | ichthyomyzon castaneus | species | 2 | 0 |
| united states | mississippi | ichthyomyzon gagei | species | 3 | 0 |
| united states | mississippi | lampetra aepyptera | species | 3 | 0 |
| united states | missouri | ichthyomyzon fossor | species | 1 | 0 |
| united states | missouri | lampetra aepyptera | species | 5 | 0 |
| united states | new york | ichthyomyzon bdellium | species | 1 | 0 |
| united states | new york | ichthyomyzon greeleyi | species | 1 | 0 |
| united states | north carolina | ichthyomyzon greeleyi | species | 1 | 0 |
| united states | north carolina | lampetra aepyptera | species | 2 | 0 |
| united states | ohio | lampetra aepyptera | species | 52 | 0 |
| united states | oregon | entosphenus lethophagus | species | 3 | 0 |
| united states | oregon | entosphenus similis | species | 3 | 0 |
| united states | oregon | lampetra tridentata | species | 1 | 0 |
| united states | tennessee | ichthyomyzon bdellium | species | 7 | 0 |
| united states | tennessee | ichthyomyzon castaneus | species | 1 | 0 |
| united states | tennessee | ichthyomyzon greeleyi | species | 2 | 0 |
| united states | tennessee | lampetra aepyptera | species | 10 | 0 |
| united states | tennessee | lampetra appendix | species | 4 | 0 |
| united states | washington | lampetra ayresii | species | 1 | 0 |
| united states | washington | lampetra richardsoni | species | 5 | 0 |
| united states | washington | lampetra tridentata | species | 4 | 0 |
| united states | wisconsin | ichthyomyzon castaneus | species | 1 | 0 |
| united states | wisconsin | ichthyomyzon fossor | species | 4 | 0 |
| united states | wisconsin | ichthyomyzon unicuspis | species | 7 | 0 |
| united states | wisconsin | lampetra appendix | species | 5 | 0 |