Dictionary of Human Evolution and Biology

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Marginal Venous Sinus

One of two large bilateral venous sinuses found in the dura mater of the nuchal region inferior to the occipital sinus and that functions to drain blood from the brain. Found in the Hadar hominids and australopithecines, this structure is part of the occipital-marginal venous system. Replaced by or modified as the transverse sinus in anatomically modern humans. Marikina bicolor: synonym for Saguinus bicolor. Marikina leucopus Hershkovitz, 1949: synonym for Saguinus leucopus. Marikina martinsi: synonym for Saguinus martinsi (Martin’s tamarin); now included within S. bicolor.

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