Squalomorphii

Squalomorphii Temporal range: 170–Recent Ma PreꞒ Ꞓ O S D C P T J K Pg N
Spiny dogfish
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Subdivision:	Selachimorpha
Superorder:	Squalomorphii Compagno 1973
Orders
Hexanchiformes Squaliformes Squatiniformes Pristiophoriformes †Protospinax (unplaced in order)

Squalomorphii is a superorder of cartilaginous fishes, generally characterized by lacking traits such as an anal fin, nictitating membrane, or suborbital shelves in the cranium. Squalomorphii sharks are also called squalea, or squalean sharks. There are about 163 living species in 11 families. Squalean sharks are divided into four orders: the Hexanchiformes, Squaliformes, Squatiniformes, and Pristiophoriformes.