Kingdom [Animalia] Linnaeus, 1758 - animals
Subkingdom Metazoa Haeckel, 1874
see Kingdom Animalia Linnaeus, 1758
Division Eumetazoa Butschli, 1910
see Subkingdom Eumetazoa Butschli, 1910
Subdivision Bilateralia
Phylum Chordata Bateson, 1885 - chordates
Subphylum Vertebrata Cuvier, 1812 - vertebrates
Class Reptilia Linnaeus, 1758 - reptiles
Subclass †Ichthyopterygia Blainville, 1835 [monotypic] - ichthyopterygians
Order †Ichthyosauria Blainville, 1835
Suborder †Longipinnati (Huene, 1948)
Family †Stenopterygiidae (Kühn, 1934)
Genus †Stenopterygius Jaekel, 1904
†Stenopterygius quadriscissus (Quenstedt, 1858)