Early Tetrapod Genera

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16 Terms

1
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Genus that paddled through bottom mud

Eusthenopteron

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Genus with both lungs and walking fins

Eusthenopteron

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Fossil genus discovered in 2006

Tiktaalik

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Genus intermediate between lobe-finned fishes and tetrapods

Tiktaalik

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Where Tiktaalik probably placed its snout to breathe air

Above water

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Genus with clearly formed digits on all limbs

Acanthostega

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How Acanthostega moved its body

Dragged on the ground

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Fingers and toes

Digits

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Genus with bulkier limb muscles to walk onto land

Ichthyostega

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Hip bone structure that was complete in Ichthyostega

Pelvis

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Girdles fully developed in Ichthyostega

Shoulder and hip girdles

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Back bones of Ichthyostega

Stronger

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Most fish-like of the four early tetrapod genera
Eusthenopteron
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Most land-ready of the four early tetrapod genera
Ichthyostega
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Oldest of the four early tetrapod genera
Eusthenopteron
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Newest of the four early tetrapod genera
Ichthyostega