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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]
Actinopterygians, or ‘ray-finned fishes,’ are the largest and most successful group of fishes and make up half of all living vertebrates. While actinopterygians appeared in the fossil record during the Devonian period, between 400-350 million years ago (Ma), it was not until the Carboniferous period ...
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Neopterygii. See text for orders. Actinopterygii, is a major taxonomic class (or subclass) of fish, known as the "ray-finned fishes," whose diverse number of species includes about half of all known living vertebrates and 96 percent of all fish species. The actinopterygians include the most familiar fish, such as sturgeons, gars, eels, carp ...
Jan 9, 2018 · The Actinopterygii (ray-finned fishes) represent around half of all living vertebrates, comprising over 32,000 extant species (Sallan 2014; Nelson et al. 2016).This remarkable modern diversity has come about through around 400 million years of evolution (Near et al. 2012; Lu et al. 2016; Giles et al. 2017), therefore to fully understand the dynamics of how extant actinopterygians have become ...
- Fiann M. Smithwick, Thomas L. Stubbs
- 2018
Between 390 and 360 million years ago, the descendents of these organisms began to live in shallower waters, and eventually moved to land. As they did, they experienced natural selection that shaped many adaptations for a terrestrial way of life. Like other terrestrial sarcopterygians, modern humans still carry the evidence of our aquatic past ...
Actinopterygii: ray-finned fishes. 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.
Actinopterygii. : Life History and Ecology. While everyone knows that fish live in water and breathe through gills, the simile "like a fish out of water" does not always apply to ray-finned fish. A few, like the walking catfish and the mudskipper, are able to crawl about on land, to find food or new habitats. Some others, like the Siamese ...
