lobe-finned fish
Americannoun
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Any of various fishes of the class Sarcopterygii, having paired fins that are rounded and fleshy, suggesting limbs. One group of lobe-finned fish are thought to be ancestors of amphibians and other land-dwelling vertebrate animals. They first appeared in the Devonian Period and are extinct except for the coelacanth and lungfish.
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Also called sarcopterygian
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Compare ray-finned fish See also crossopterygian
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The research team found that similar to the tetrapod and lobe-finned fish Aqp10s, Aqp10.1 in ray-finned fishes also transport water, glycerol, urea, and boric acid.
From Science Daily ● Dec. 21, 2023
These intriguing results indicate that water, glycerol, urea, and boric acid permeabilities are plesiomorphic features of Aqp10 water channels in all tetrapods and lobe-finned fish.
From Science Daily ● Dec. 21, 2023
About 400 million years ago, they diverged from the line of lobe-finned fish that gave rise to tetrapods 30 million years later.
From Science Magazine ● Feb. 10, 2021
The ability to breathe air occasionally appeared in the common ancestor to ray-and lobe-finned fish, about 425 million years ago.
From Science Magazine ● Feb. 10, 2021
If, as his article suggests, claspers are the progenitors of tetrapod limbs, then where do nearly amphibious lobe-finned fish such as Tiktaalik, of the same age as his placoderms, fit in this phylogeny?
From Scientific American ● Apr. 22, 2011
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
