Fishes Class Cephalaspidomorphi Moy-Thomas & Mile, 1971 Order Petromyzontiformes Berg, 1940 - lampreys Family Petromyzontidae Bonaparte, 1832 - lampreys Subfamily Mordaciinae see Family Mordaciidae Gill, 1893 1 Genus Caragola Gray, 1851 2 Genus Mordacia Gray, 1851