Subphylum [Vertebrata] Cuvier, 1812 - vertebrates Class Agnatha Cope, 1889 Subclass †Thelodonti Kiaer, 1932 Order †Thelodontiformes Kiaer, 1932 Family †Lanarkiidae Obruchev, 1949 Genus †Lanarkiaᵀ Traquair, 1899