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Agnatha
(redirected from jawless fish)

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Agnatha

One of the five classes of fish, represented by the hagfish and lamprey. They are primitive craniate vertebrates which have no true jaw and a suckerlike mouth.



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? Mentioned in ? References in periodicals archive
 
Instead, these early jawless fish appear to have had skulls and other skeletal structures made of cartilage, says Simon Conway Morris of the University of Cambridge in England, who collaborated with the Chinese team.
Waking Up to the Dawn of Vertebrates by Monastersky, R. / Science News
Scientists in 1976 identified the fossils, called Anatolepis, as the scales of a jawless fish.
Jump-start for the vertebrates; new clues to how our ancestors got a ... by Monastersky, Ronald / Science News
The bony spine typical of most vertebrates is replaced in jawless fish by a flexible rod similar to cartilage.
Fossils flesh out early vertebrates by Bower, Bruce / Science News
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