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Actinopterygii (/ ˌ æ k t ɪ n ɒ p t ə ˈ r ɪ dʒ i aɪ /; from actino- 'having rays' and Ancient Greek 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]
Evolution of ray-finned fishes, Actinopterygii, from the Devonian to the present as a spindle diagram. The width of the spindles are proportional to the number of families as a rough estimate of diversity. The diagram is based on Benton, M. J. (2005) Vertebrate Palaeontology, Blackwell, 3rd edition, Fig 7.13 on page 185.
Actinopterygii: Subclass: Chondrostei: Order: Acipenseriformes L. S. Berg, 1940: Subgroups Genus †Eochondrosteus? Family †Chondrosteidae (sometimes placed in its own order) Family †Peipiaosteidae; Suborder Acipenseroidei. Family Acipenseridae (sturgeon) Family Polyodontidae (paddlefish)
Edward Hitchcock's fold-out paleontological chart in his 1840 Elementary Geology. Although tree-like diagrams have long been used to organise knowledge, and although branching diagrams known as claves ("keys") were omnipresent in eighteenth-century natural history, it appears that the earliest tree diagram of natural order was the 1801 "Arbre botanique" (Botanical Tree) of the French ...
The species Amphiprion ocellaris belongs to the class Actinopterygii which contains bony Teleost fish and other ray-finned fish. A. ocellaris is the most basal species in the genus Amphiprion which is closely related to the genus Premnas. The species' most closely related ancestor is Amphiprion percula, the orange clownfish.
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Percomorpha are the most diverse group of teleost fish today. Teleosts, and percomorphs in particular, thrived during the Cenozoic era.Fossil evidence shows that there was a major increase in size and abundance of teleosts immediately after the mass extinction event at the Cretaceous-Paleogene boundary ca. 66 Ma ago. [7]
Osteichthyes is divided into the ray-finned fish (Actinopterygii) and lobe-finned fish (Sarcopterygii). The oldest known fossils of bony fish are about 420 million years ago, which are also transitional fossils , showing a tooth pattern that is in between the tooth rows of sharks and bony fishes.