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Acanthostega gunnari was a Late Devonian stem tetrapod known from fossils found in East Greenland. It possessed limbs with eight digits, but its limb proportions, tail fin, and internal gills indicate that it remained primarily aquatic rather than moving effectively on land. The animal provides impo...
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Ichthyostega stensioei was a Late Devonian vertebrate from East Greenland and one of the earliest well-known tetrapods. It combined limbs with digits and a strong ribcage with aquatic features, including a finned tail and sensory adaptations inherited from fishlike ancestors. Its anatomy indicates t...
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