Class Petromyzontes (vertebrate)
Parent taxon: Cyclostomata according to H. Gadow 1898
See also Jaekel 1911
Sister taxa: Anaspida, Conodontophorida, Hypospondyli, Myxini, Palaeospondyli, Petromyzontida
Subtaxa: none
Ecology:
Distribution: there are no occurrences of Petromyzontes in the database