Shairk

Sharks Temporal range: Ludfordian-Present, 425–0 Ma PreЄ Є O S D C P T J K Pg N
Clockwise frae tap left: spiny dugfish, Japanese sawshark, whaul shairk, great white shairk, horn shairk, frilled shairk, scalloped haimerheid an Australian angelshairk representin the orders Squaliformes, Pristiophoriformes, Orectolobiformes, Lamniformes, Heterodontiformes, Hexanchiformes, Carcharhiniformes an Squatiniformes respectively.
Scientific classification
Kinrick:	Animalia
Phylum:	Chordata
Cless:	Chondrichthyes
Subcless:	Elasmobranchii
Infracless:	Euselachii
Superorder:	Selachimorpha
Orders
Carcharhiniformes Heterodontiformes Hexanchiformes Lamniformes Orectolobiformes Pristiophoriformes Squaliformes Squatiniformes † Cladoselachiformes † Hybodontiformes † Symmoriida † Xenacanthida (Xenacantiformes) † Elegestolepis † = extinct
Synonyms
Pleurotremata

Shairks (superorder Selachimorpha) is a kynd o fish wi a skelet that's hailly cartilaginous an wi a gey an streamlined bouk. The earliest kent shairks dates frae mair nor 420 million year syne, afore the time o the dinosaurs.

• Sea dug (Galeorhinus galeus)
• Sail-fish, muldoan, or cairban (Cetorhinus maximus)

Alex