Squalea

Squalea
Thorn shark (Squalus acanthias) Saegerochen(Pristis pectinata)
Systematics
Over class: Kiefermaeuler (Gnathostomata) Class: Cartilage fish (Chondrichthyes) Subclass: Plattenkiemer (Elasmobranchii) Zwischentaxon: Modern sharks (Neoselachii) Putting above: Squalea
Scientific name
Squalea
Shirai, 1996
Orders
Thorn-shark-well-behaved (Squaliformes) Hexanchiformes Angel sharks (Squantiniformes) Sawingshark-well-behaved (Pristiophoriformes) Pristiformes Rajiformes Torpediniformes

To that Squalea becomes about 400 Kinds that modern sharks and skates (Neoselachii) counted.

They are the sister order that Genuine sharks (Galeomorphii). The skates (Batoidae), to which one those Orders that Pristiformes, Torpediniformes and Rajiformes place about two thirds of the kinds of the Squalea count. Angel sharks (Squantiniformes), Sawing sharks (Pristiophoriformes) and the three orders of the skates become the dividing axon Hypnosqualea summarized.

The anal fin is missing to all Squalea. Most Squalea revives and/or. close of the bottoms of the sea.

The origin of the Squalea lies in Lower law, from that it the earliest fossils of the Hexanchiformes as well as that Playing the violin skate (Rhinobatidae) gives.