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Antiquity of "Sail-Backed" Neural Spine Hyper-Elongation in Mammal Forerunners
2020
Frontiers in Earth Science
Neural spine hyper-elongation in tetrapods is a unique morphological adaptation that creates a dorsal sail. While this extreme morphology has appeared several times in the evolutionary history of tetrapods, it was first experimented with by the nonmammalian synapsid paraphyletic group known as "Pelycosaurs," famously represented by the Permian apex predator Dimetrodon. Here we provide new fossil data tracing the evolution of this morphological innovation back to the initial Carboniferous
doi:10.3389/feart.2020.00083
fatcat:4t4ea4tadnbuzlsgdiuh47u56q