[Phylum] Chordata Bateson, 1885 - chordates
Subphylum Craniata auct.
Infraphylum Vertebrata Lamarck, 1801 - vertebrates
Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
Subclass Euselachii Hay, 1902 - sharks, rays, and related fossils
Infraclass †Hybodonta [monotypic] - hybodonts
Order †Hybodontiformes Patterson, 1966
Family †Thaiodontidae Cuny, Suteethorn, Kamha & Buffetaut, 2008
Genus †Thaiodus Cappetta, Buffetaut & Suteethorn, 1990