In this volume the author examines the pervasive pattern of alternation of structure and height of vertebral neural spines in the context of a larger review of axial structure in the most terrestrial of primitive Permo-Carboniferous tetrapods. He concludes that a coupled pattern of axial dorsiflexion and rotation played a significant role in primitive terrestrial locomotion.
Vertebral Morphology, Alternation of Neural Spine Height, and Structure in Permo-Carboniferous Tetrapods, and a Reappraisal of Primitive Modes of Terrestrial Locomotion
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