Elasmobranchii
Scientific name
- Scientific name
- Elasmobranchii
How to say it in other languages
- Chinese
- 板鰓亞綱
- Dutch
- Haaien
- German
- Plattenkiemer
- Italian
- Elasmobranchi
- Japanese
- 板鰓亜綱
- Russian
- Пластиножаберные
Facts from Wikipedia’s “Elasmobranchii” page and Wikispecies (CC BY-SA 4.0).
Elasmobranchii is a subclass of the Chondrichthyes or cartilaginous fish. It includes the modern sharks and the rays and skates.
Evolution
Fossilised shark teeth are known from the early Devonian, around 400 million years ago. During the following Carboniferous period, the sharks underwent a period of diversification, with many new forms evolving. Many of these became extinct during the Permian, but the remaining sharks underwent a second burst of adaptive radiation during the Jurassic, around which time the skates and rays first appeared.
Taxonomy
- Subclass Elasmobranchii
- †Plesioselachus
- †Order Squatinactiformes
- †Order Protacrodontiformes
- †Infraclass Cladoselachimorpha
- †Order Cladoselachiformes
- †Infraclass Xenacanthimorpha
- †Order Xenacanthiformes
- Infraclass Euselachii (sharks and rays)
- †Order Ctenacanthiformes
- †Division Hybodonta
- †Order Hybodontiformes
- Division Neoselachii
- Subdivision Selachii (Selachimorpha) (modern sharks)
- Superorder Galeomorphi
- Order Heterodontiformes (bullhead sharks)
- Order Orectolobiformes (carpet sharks)
- Order Lamniformes (mackerel sharks)
- Order Carcharhiniformes (ground sharks)
- Superorder Squalomorphi
- Order Hexanchiformes (frilled and cow sharks)
- Order Squaliformes (dogfish sharks)
- †Order Protospinaciformes
- Order Squatiniformes (angel sharks)
- Order Pristiophoriformes (sawsharks)
- Subdivision Batoidea (rays)
- Order Torpediniformes (electric rays)
- Order Pristiformes (sawfishes)
- Order Rajiformes (skates and relatives)
- Order Myliobatiformes (stingrays and relatives)
Where this page comes from
The article above is adapted from “Elasmobranchii” on Simple English Wikipedia, by its contributors. We removed reference markers, navigation boxes and tables, expanded measurement templates into readable numbers, and kept the prose otherwise intact.
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