Northern lampreys

The northern lampreys (Petromyzontidae) are a family of lampreys. Northern lampreys have the highest number of chromosomes (164–174) among vertebrates.[1]

Northern lampreys
Sea lampreys (Petromyzon marinus) on a lake trout
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Hyperoartia
Order: Petromyzontiformes
Family: Petromyzontidae
A. Risso, 1827
Genera

Caspiomyzon
Entosphenus
Eudontomyzon
Ichthyomyzon
Lampetra
Lethenteron
Petromyzon
Tetrapleurodon

Genera
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References
  1. Froese, Rainer, and Daniel Pauly, eds. (2011). "Petromyzontidae" in FishBase. February 2011 version.
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