lobe-finned fish


Also found in: Thesaurus, Encyclopedia, Wikipedia.
Related to lobe-finned fish: ray-finned fish

lobe-finned fish

 (lōb′fĭnd′)
n.
Any of various bony fishes of the class Sarcopterygii, having paired fleshy rounded fins. The lobe-finned fishes first appeared in the Silurian Period and are extinct except for the coelacanths and lungfishes. Also called lobefin, sarcopterygian.

lobe-finned fish

Any of various bony fish with fins that are rounded and fleshy, suggesting limbs. The lobe-finned fish are thought by some to be ancestors of amphibians and other land-dwelling vertebrate animals. They first appeared in the Ordovician Period and are extinct except for the coelacanth and lungfish.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.lobe-finned fish - any fish of the order Crossopterygiilobe-finned fish - any fish of the order Crossopterygii; most known only in fossil form
bony fish - any fish of the class Osteichthyes
Crossopterygii, subclass Crossopterygii - fishes having paired fins resembling limbs and regarded as ancestral to amphibians
coelacanth, Latimeria chalumnae - fish thought to have been extinct since the Cretaceous period but found in 1938 off the coast of Africa
References in periodicals archive ?
Evolution of the lobe-finned fish from about 40 million years ago could have led to the first land-dwelling vertebrate animals, suggest researchers.
They discovered that Eusthenopteron, a Devonian (370 million year old) lobe-finned fish from Miguasha in Canada that is closely related to the first tetrapods, already exhibited typical marrow processes inside its humerus (upper arm bone).
A lobe-finned fish with a broad flat head and sharp teeth, Tiktlik looked like a cross between a fish and a crocodile, growing up to a length of 9 feet as it hunted in shallow freshwater environments.
It features a lobe-finned fish holding a bat while it and several others look up at a baseball sitting on a dry beach.
These were predatory lobe-finned fish which could reach seven metres in length, making it the largest freshwater fish known.