found: Work cat.: Maisey, J.G. The braincase in Paleozoic symmoriiform and cladoselachian sharks, 2007:p. 97 (Order Cladoselachida)
found: Britannica online, July 26, 2008(Cladoselachii, fossil fish order; consisted of marine fishes known only from fossils of the late Middle Devonian, Carboniferous, and Early Permian periods; identified with the Chondrichthyes)
found: The paleobiology database, via WWW, July 26, 2008(order Cladoselachii, subclass Elasmobranchii, class Chondrichthyes)
found: McGraw-Hill's AccessScience, via WWW, July 26, 2008(Order Cladoselachiformes, Subdivision Selachii, Subclass Elasmobranchii, Class Chondrichthyes; Cladoselachians (late Paleozoic))
found: Wikispecies, via WWW, July 26, 2008(Ordo Cladoselachiformes, Superordo Selachimorpha, Subclassis Elasmobranchii, Classis Chondrichthyes)