2018 Genus: Lebachacanthus Soler-Gijon, 1997 Genus: Reginaselache Turner & Burrow, 2011 Family: Sphenacanthidae Heyler & Poplin 1989 Genus: Sphenacanthus Agassiz, 1837 Genus: Xenosynechodus Agassiz, 1980 Family: Orthacanthidae Heyler & Poplin 1989 Genus: Orthacanthus Agassiz, 1843 Family: Xenacanthidae Fritsch, 1889 Genus: Mooreodontus Ginter et al., 2010 Genus: Plicatodus Hampe, 1995 Genus: Triodus Jordan, 1849 Genus: Xenacanthus Beyrich, 1848 Genus: Wurdigneria Richter, 2005 incertae sedis Genus: Anodontacanthus Davis, 1881 Genus: Tikiodontus Bhat, Ray & Datta, 2018 References Further reading Prehistoric cartilaginous fish orders Carboniferous sharks Permian sharks Triassic sharks Mississippian first appearances Mississippian taxonomic orders Pennsylvanian taxonomic orders Cisuralian taxonomic orders Guadalupian taxonomic orders Lopingian taxonomic orders Early Triassic taxonomic orders Middle Triassic taxonomic orders Middle Triassic extinctions