Sexual dimorphism of tooth size in anthropoids |
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Authors: | P W Lucas R T Corlett D A Luke |
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Institution: | (1) Department of Anatomy, National University of Singapore, 0511 Kent Ridge, Singapore;(2) Department of Botany, National University of Singapore, 0511 Kent Ridge, Singapore;(3) Unit of Anatomy in relation to dentistry Anatomy Department, Guy’s Hospital Medical School, St Thomas Street, SE1 9RT London |
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Abstract: | We have examined the size of the canine and postcanine teeth of cebid and catarrhine primates in relation to each other, to
jaw size and to body weight. We have found that the canine size of males is large enough to be limited by jaw shape and size.
A large contribution of P4 to the postcanine row is associated with smaller canines in males. Neither factor seems to limit
canine size in females. The females of a small number of species possess enlarged canines. Much of the variation of the postcanine
row can be described by the ratio of the (nominal) crown areas of M1 to M3. This ratio is monomorphic which conforms with
the general lack of dietary dimorphism in primates. A brief discussion of the evolution of canine size is offered with a new
suggestion to account for canine reduction in male hominids. |
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