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Fossil evidence and stages of elongation of the Giraffa camelopardalis neck [Royal Society Open Science]

par Frédéric Magné - publié le

Several evolutionary theories have been proposed to explain the adaptation of the long giraffe neck ; however, few studies examine the fossil cervical vertebrae. We incorporate extinct giraffids, and the okapi and giraffe cervical vertebral specimens in a comprehensive analysis of the anatomy and elongation of the neck. We establish and evaluate 20 character states that relate to general, cranial and caudal vertebral lengthening, and calculate a length-to-width ratio to measure the relative slenderness of the vertebrae.(...)

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