Genus TRISTYCHIUS
Kingdom / Phylum . . . . . . . . Subphylum / Superclass . . . . Class / Subclass / Infraclass Division / Superorder / Order Suborder / Infraorder . . . . . . Superfamily / Family . . . . . . . Subfamily / Genus . . . . . . . . .	Animalia / Chordata Cephalochordata / Gnathostomata Chondrichthyes / Elasmobranchii / n.a. n.a. / Euselachii / Ctenacanthiformes n.a. / n.a. Hybodontoidea / uncertain n.a. / Tristychius
Age: Distribution:	Early Carboniferous Europe
Depicted on: Grenada, 1997 (M.S. 1)