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Agnatha
(redirected from agnathan)

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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
 
Metamorphosis of larval sea lamprey Petromyzon marinus (an agnathan fish) is also affected by exposure to perchlorate (Manzon and Youson 1997, 2002; Manzon et al.
Effects of ammonium perchlorate on thyroid function in developing ... by Brown, J. Anne / Environmental Health Perspectives
Because the evidence of these fish, called agnathans, is scant and fragmentary, scientists know little about the agnathans' appearance or about their evolutionary history.
Facing up to a backwards fossil by Science News
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