Vertebrata Cuvier, 1812 - vertebrates Class Agnatha Cope, 1889 [paraphyletic] Subclass Cephalaspidomorpha see Class Agnatha Cope, 1889 Order †Anaspida Traquair - anaspids see Class Anaspida Traquair Family †Lasaniidae [monotypic] see Family Birkeniidae Traquair, 1899 Genus †Lasanius Traquair, 1899