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Actinopterygii (/ ˌ æ k t ɪ n ɒ p t ə ˈ r ɪ dʒ i aɪ /; from Ancient Greek ἀκτίς (aktis) 'having rays' and πτέρυξ (ptérux) 'wing, fins'), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish [2] that comprise over 50% of living vertebrate species. [3]
Acanthopterygii (meaning "spiny finned one") is a superorder of bony fishes in the class Actinopterygii.Members of this superorder are sometimes called ray-finned fishes for the characteristic sharp, bony rays in their fins; however this name is often given to the class Actinopterygii as a whole.
Both its major subgroups are successful today: Actinopterygii includes most extant bony fish species, and Sarcopterygii includes the tetrapods. Euteleostomes originally all had an endochondral bone, fins with lepidotrichs (fin rays), jaws lined by maxillary, premaxillary, and dentary bones composed of dermal bone, and lungs.
This Osteoglossiformes -related article is a stub. You can help Wikipedia by expanding it.
It is a member of the class Actinopterygii, the ray-finned fishes.It is further classified into the order Scorpaeniformes, commonly known as the mail-cheeked fishes.The superfamily Cottoidea which is classified within this order includes R. richardsonii and all other sculpins.
Fossil of Chondrosteus acipenseroides from Lyme Regis Strongylosteus hindenburgi fossil from Posidonia Shale, Staatliches Museum für Naturkunde Stuttgart. Chondrosteidae / ˌ k ɒ n d r oʊ s t i ˈ aɪ d iː / is a family of extinct marine actinopterygian fishes, known from the Early Jurassic of Europe.
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Chondrostei is a group of non-neopterygian ray-finned fish.While the term originally referred to the paraphyletic grouping of all non-neopterygian ray-finned fish, it was redefined by Patterson in 1982 to be a clade comprising the Acipenseriformes (which includes sturgeon and paddlefish) and their extinct relatives.
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