Genus PROTOSIGANUS
Kingdom / Phylum . . . . . . . . Subphylum / Superclass . . . . Class / Subclass / Infraclass Division / Superorder / Order Suborder / Infraorder . . . . . . Superfamily / Family . . . . . . . Subfamily / Genus . . . . . . . . .	Animalia / Chordata Cephalochordata / Gnathostomata Osteichthyes / Actinopterygii / Neopterygii Teleostei / Acanthopterygii / Perciformes Acanthuroidei / n.a. n.a. / Siganidae n.a. / Protosiganus
Age: Distribution:	Oligocene Europe
Depicted on: Switzerland, 1961 (20+10 c., fossil P. glaronensis)   Note: also known under the synonym Archaeteuthis.