found: Common and sci. names of fishes from the U.S. and Canada, 1991:p. 11 (Petromyzontidae--lampreys. Order Petromyzontiformes)
found: Nelson, J.S. Fishes of the world, c1994:p. 30 (Family Petromyzontidae (Petromyzonidae)--lampreys. Order Petromyzontiformes; petromyzontids. Four subfamilies: Petromyzontinae, Geotriinae, Mordaciinae, Mayomyzontinae (known only from fossils))
found: Catalog of fishes, via WWW, June 6, 2003:classification (Petromyzontidae (lampreys), Order Petromyzontiformes. Three subfamilies: Petromyzontinae, Geotriinae, Mordaciinae)
found: Encyc. of fishes, 1995:p. 24 (Petromyzontidae, Northern lampreys. Order Petromyzontiformes)
found: ITIS, via WWW, June 6, 2003(Family Petromyzontidae -- lampreys. Order Petromyzontiformes)
