Genus XENACANTHUS
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 / Xenacanthida n.a. / n.a. n.a. / Xenacanthidae n.a. / Xenacanthus
Age: Distribution:	Early Permian - Triassic Northern America, Europe, India
Depicted on: Comoros, 1998 (position 5 on sheet 1) Gabon, 1995 (position 4 on sheet 2) Nicaragua, 1999 (M.S. 2 margin)