ray-finned fish


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Related to ray-finned fish: lobe-finned fish

ray-finned fish

(rā′fĭnd′)
n.
Any of various fishes belonging to the class Actinopterygii, having fins supported by long rays of bone. The ray-finned fishes are the largest group of fishes, comprising over 20,000 species. Also called actinopterygian.
References in periodicals archive ?
Genome duplication, a trait shared by 22,000 species of ray-finned fish. Genome Res., 13: 382-390.
"Our results suggest that ancient extinctions in the marine environment may have wiped out the earliest ray-finned fishes living in the oceans, that the oceans were then recolonized from freshwater habitats, and that most marine fish species living today are descended from that recolonization (leaving less time for biodiversity to build up in the oceans)," he said.
Summary: DUBAI - Small ray-finned fish once filled the freshwater pools in FujairahAEs Wadi Wurayah.
Among the most ancient of the living lineages of ray-finned fishes, the Polypterus bichirs share traits such as paired lungs with both modern amphibians and very early four-limbed vertebrates.
The first was the explosion of ray-finned fishes after the Hangenberg extinction, an event 360 million years ago that decimated ocean life on Earth.
The evolution of the caudal fin has become such an important tool in systematics that "nearly every investigator who has discussed the evolution of vertebrates has commented on the caudal fin of ray-finned fishes (Actinopterygii)" (Lauder, 1989).
The air bladders seen in modern ray-finned fishes are very different in their anatomical details from lungs.
11 issue of Nature Communications that caps more than 25 years of work finds that the vast majority of vertebrates -- some 30,000 species of land animals (including humans) and a roughly equal number of ray-finned fishes -- descended from a common ancestor that had a well-developed electroreceptive system.
Some ray-finned fishes - including paddlefishes and sturgeons - retained these receptors in the skin of their heads.