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Gnathostomata
(redirected from Jawed fish)

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Gnathostomata [‚nā·thə′stō·məd·ə]
(invertebrate zoology)
A suborder of echinoderms in the order Echinoidea characterized by a rigid, exocyclic test and a lantern or jaw apparatus.
(vertebrate zoology)
A group of the subphylum Vertebrata which possess jaws and usually have paired appendages.
Gnathostomata 

higher vertebrates having jaws, paired nostrils, and paired limbs. The Gnathostomata include fish, amphibians, reptiles, birds, and mammals.
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Warr contends that the newly identified genes probably do represent the first diversified V-region families to be found in animals more primitive than jawed fish.
Hints of primitive antibodies. (First Line of Defense) by Marzuola, C. / Science News
He notes that recent fossil finds from China indicate the existence of several different jawed fish early in the Silurian, which began 438 million years ago.
The first shark: to bite or not to bite? by Monastersky, Richard / Science News
 
 
 
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