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Actinopterygii. Actinopterygii ( / ˌæktɪnɒptəˈrɪdʒiaɪ /; 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]
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Diversification of Actinopterygii and main Neotropical lineages. The Actinopterygii are divided into two classes: Cladistia (bichirs), represented by a single modern order (Polypteriformes) restricted to Africa, and Actinopteri, with the subclasses Chondrostei and Neopterygii. Only the subclass Neopterygii occurs in South and Central America ...
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Actinopteri / æktɪˈnɒptəraɪ / is the sister group of Cladistia ( bichirs) in the class Actinopterygii (ray-finned fish). Dating back to the Permian period, the Actinopteri comprise the Chondrostei ( sturgeons and paddlefish ), the Holostei ( bowfins and gars ), and the teleosts. In other words all extant ray-finned fish minus the bichirs.
The Actinopterygii, or ray-finned fishes, are the largest class of fishes. In existence for about 400 million years, since the Early Devonian, it consists of some 42 orders containing more than 480 families, at least 80 of which are known only from fossils. The class contains the great majority of known living and fossil fishes, with about ...
Feb 9, 2015 · Ray-finned fishes (Actinopterygii) constitute approximately half of all living vertebrate species. A stable hypothesis of relationships among major modern lineages has emerged over the past decade, supported by both anatomy and molecules. Diversity is unevenly partitioned across the actinopterygian tree, with most species concentrated within a ...
- Matt Friedman
- 2015
3127 species. Actinopterygii (; 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 that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of skin ...
Nov 17, 2022 · An actinopterygian fossil with unexpected anatomical features from 7 million years before the end-Devonian mass extinction suggests complex patterns of divergence and diversification around the ...
