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19 lampreys species
Petromyzon marinus
Lampetra richardsoni
Entosphenus tridentatus
Lethenteron appendix
Ichthyomyzon unicuspis
Ichthyomyzon castaneus
Ichthyomyzon fossor
Lethenteron camtschaticum
Ichthyomyzon bdellium
Entosphenus minimus
Ichthyomyzon greeleyi
Ichthyomyzon gagei
Entosphenus lethophagus
Entosphenus similis
Lethenteron alaskense
Lampetra planeri
Lampetra aepyptera
Lampetra fluviatilis
Eudontomyzon mariae
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