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Theropod Foot Comparison

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Another diagram for the upcoming evolution book!

Everything but pigeon referenced from Greg Paul diagrams; pigeon referenced from various photographs of pigeon skeletons I could find.

Two interesting points as an animal becomes more "birdlike": the hallux moves towards greater mobility, and the tarsometatarsus fuses. The tarsometatarsus of Archaeopteryx represents a unique semi-fused "transition" state between unfused and totally fused metatarsal bones.
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Evodolka's avatar
love seeing these comparisons