About: Polydactyly in early tetrapods   Sponge Permalink

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Acanthostega had eight digits, while the more derived Ichthyostega had seven digits. Following this trend, the yet-more derived Tulerpeton had six. The increasing number of such discoveries in paleontology has led to the challenging of the hypothesis that pentadactyly, as displayed by most modern tetrapods, is plesiomorphic. The number of digits may have reduced in amphibians and reptiles independently.

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  • Polydactyly in early tetrapods
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  • Acanthostega had eight digits, while the more derived Ichthyostega had seven digits. Following this trend, the yet-more derived Tulerpeton had six. The increasing number of such discoveries in paleontology has led to the challenging of the hypothesis that pentadactyly, as displayed by most modern tetrapods, is plesiomorphic. The number of digits may have reduced in amphibians and reptiles independently.
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abstract
  • Acanthostega had eight digits, while the more derived Ichthyostega had seven digits. Following this trend, the yet-more derived Tulerpeton had six. The increasing number of such discoveries in paleontology has led to the challenging of the hypothesis that pentadactyly, as displayed by most modern tetrapods, is plesiomorphic. The number of digits may have reduced in amphibians and reptiles independently.
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