Chordata Bateson, 1885 - chordates Class †Ostracophori Order †Cycliae [monotypic] Family †Palaeospondylidae Gill, 1896 [monotypic] Genus †Palaeospondylus Traquair, 1890 [monotypic] 1 †Palaeospondylus gunni see Dipterus valenciennesi Sedgwick & Murchison, 1828