[Phylum] Chordata Bateson, 1885 - chordates Subphylum Craniata auct. Infraphylum Vertebrata Lamarck, 1801 - vertebrates Superclass †Thelodontomorphi Jaekel, 1911 [monotypic] Class †Thelodonti Jaekel, 1911 Family †Helenolepididae Wilson & Märss, 2009 Genus †Helenolepis Karatajūtė-Talimaa, 1978