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On aspects of skull form in African apes and orangutans, with implications for hominoid evolution. American Journal of Physical Anthropology 68, 329-342 (1985a). Shea, B. T. On skull form and the supraorbital torus in primates. Current Anthropology 27, 257-260 (1985b). Shea, B. T. Phylogenetic aspects of skull form in the hominoid primates. In Orang-utan Biology. Ed. J. H. Schwartz (New York: Oxford University Press, 1988) 233-245. Sussman, R. Primate origins and the evolution of angiosperms. American Journal of Primatology 23, 209-223 (1991). Wright, B. Craniodental biomechanics and dietary toughness in the genus Cebus. Journal of Human Evolution 48, 473-92 (2005). Do all primates have enhanced sense of vision?Good vision is a hallmark of the primate order. Compared with many other mammals, primates have more closely spaced, forward-facing eyes that allow for a lot of overlap between each eye's visual field, which in turn gives primates 3-D, or stereoscopic, vision and a good sense of depth perception.
Why do primates have an enhanced sense of vision?First, primates have larger eyes than many other mammals of comparable body size (Ross & Kirk, 2007). Having large eyes ensures that a large image is formed on the retina (Walls, 1942; Land & Nilsson, 2002). This large retinal image may then be sampled by many photoreceptors, improving visual resolution.
Which of the following features is used to define the order primates?Primates are distinguished from other mammals by one or more of the following traits: unspecialized structure, specialized behaviour, a short muzzle, comparatively poor sense of smell, prehensile five-digit hands and feet possessing flat nails instead of claws, acute vision with depth perception due to forward-facing ...
What sense is enhanced in primates?Primates are mammals with complex and large brains compared to body size and traits including an enhanced sense of touch, increased reliance on vision, and reduced reliance on sense of smell compared to other mammals.
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The primate emphasis on the visual sense is reflected in all of the following except
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