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Agnatha |
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Agnatha
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name for several primitive marine and freshwater fishes of the order Cyclostomata, or jawless fishes (see cyclostome). Gareth Fraser, postdoctoral fellow at Georgia Tech's School of Biology, describes it as a common gene regulatory circuit that controls the development of all dentitions, from the first teeth in the throats of jawless fishes that lived half a billion years ago, to the incisors and molars of modern vertebrates. name for several primitive marine and freshwater fishes of the order Cyclostomata, or jawless fishes (see cyclostome). |
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