Abstract
African anthropoids are first recorded in Early Oligocene deposits of the Fayum Province, Egypt. Six genera and nine species are recognized. Estimated body weights for these taxa are based on the regression equation log10(B) = 2.86log10(L) + 1.37, whereB is the bodyweight in grams, and Lis the M2length in millimeters. The equation is derived from 106 species of living primates. Fayum species range in body weight from about 600 g (Apidium moustafai)to about 6000 g (Aegyptopithecus zeuxis).A similar range of body weight is found among extant Cebidae. The Fayum primates are larger than any extant insectivorous primates;this fact probably rules out a predominantly insectivorous diet. Extant frugivorous hominoids can be separated from folivorous hominoids on the basis of molar morphology. Folivorous apes (gorilla and siamang) have proportionately more shearing on their molars than do frugivorous species. Based on the hominoid analogy, the molar morphology of the Fayum species is consistent with a frugivorous diet. Parapithecus grangeristands apart from other Fayum species in having better developed molar shearing, possibly indicating that it had more fiber in its diet. Terrestrial species of Old World monkeys tend to have significantly higher molar crowns than do more arboreal species. This difference may relate to an increased amount of grit in the diet of the more terrestrial species, selecting for greater resistance to wear. Oligocene primates have molar crown heights consistent with a primarily arboreal mode of existence. However, the particularly high molar crowns of Parapithecus grangerisuggest that this species may have foraged on the ground to a considerable degree. Other evidence is advanced suggesting that Apidiummay have had a diurnal activity pattern.
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References
Boyd, C. E., and Goodyear, C. P. (1971). Nutritive quality of food in ecological systems.Arch. Hydrobiol. 69: 256–260.
Cartmill, M. (1970).The Orbits of Arboreal Mammals: A Reassessment of the Arboreal Theory of Primate Evolution, Doctoral thesis, University of Chicago.
Eisenberg, J. F. (1978). The evolution of arboreal herbivores in the Class Mammalia. In Montgomery, G.G.(ed.),The Ecology of Arboreal Folivores, Smithsonian Inst. Press, Washington, D.C, pp. 135–152.
Gingerich, P. D. (1977). Correlation of tooth size and body size in living hominoid primates, with a note on relative brain size inAegyptopithecus andProconsul. Am. J. Phys. Anthropol. 47: 395–398.
Hladik, C. M. (1977). Chimpanzees of Gabon and chimpanzees of Gombe: Some comparative data on the diet. In Clutton-Brock, T.H. (ed.),Primate Ecology, Academic Press, New York, London, pp. 481–503.
Hladik, C. M., Hladik, A., Bousset, J., Valdebouze, P., Viroben, G., and Delort-Laval, J. (1971). Le régime alimentaire des primates de l’Île de Barro-Colorado (Panama). Résultats des analyses quantitatives.Folia Primatol. 16: 85–122.
Hylander, W. L. (1975). Incisor size and diet in anthropoids, with special reference to Cercopithecidae.Science 180: 1095–1098.
Jerison, H. (1973).The Evolution of the Brain and Intelligence, Academic Press, New York.
Kay, R. F. (1973).Mastication, Molar Tooth Structure, and Diet in Primates, Ph.D. thesis, Yale University, New Haven, Conn.
Kay, R. F. (1977a). The evolution of molar occlusion in the Cercopithecidae and early catarrhines.Am. J. Phys. Anthropol. 46: 327–352.
Kay, R. F. (1977b). Diets of early Miocene hominoids.Nature 268: 628–630.
Kay, R. F. (1977c). Post-Oligocene evolution of catarrhine diets.Am. J. Phys. Anthropol. 47: 141–142. (abstr.).
Kay, R. F., and Cartmill, M. (1977). Cranial morphology and adaptations ofPalaechthon nacimienti and other Paromomyidae (Plesiadapoidea,? Primates), with a description of a new genus and species.J. Hum. Evol. 6: 19–53.
Kay, R. F., and Hylander, W. L. (1979). The dental structure of mammalian folivores with special reference to Primates and Phalangeroidea (Marsupialia). In Montgomery, G.G. (ed.),The Biology of Arboreal Folivores, Smithsonian Inst. Press, Washington, D.C, pp. 173–191.
Kay, R. F., Sussman, R., and Tattersall, I. (1978). Dietary and dental variations in the genusLemur, with comments concerning general dietary-dental correlations of Malagasy strepsirhines.Am. J. Phys. Anthropol. 49: 119–128.
Kinzey, W. G. (1978). Feeding behavior and molar features in two species of titi monkey. In Chivers, D.J., and Herbert, J. (eds.),Recent Advances in Primatology, Vol. 1, Behavior, Academic Press, New York, London, pp. 373–386.
Radinsky, L. (1973).Aegyptopithecus endocasts: Oldest record of a pongid brain.Am. J. Phys. Anthropol. 39: 239–248.
Radinsky, L. (1977). Early primate brains: Facts and fiction.J. Hum. Evol. 6: 79–86.
Rosenberger, A. L., and Kinzey, W. G. (1976). Functional patterns of molar occlusion in platyrrhineprimates.Am. J. Phys. Anthropol. 45: 281–297.
Seligsohn, D. (1977). Analysis of species-specific molar adaptations in strepsirhine primates. In Szalay, F.S. (ed.),Contributions to Primatology, Vol. 11, S. Karger, Basel, New York.
Simons, E. L. (1967). The earliest apes.Sci. Am. 217: 28–35.
Simons, E. L. (1968). Early Cenozoic mammalian faunas, Fayum Province, Egypt. I. African Oligocene mammals: Introduction, history of study, and faunal succession.Bull. Peabody Mus. 28: 1–21.
Simons, E. L. (1970). The deployment and history of Old World monkeys (Cercopithecidae, Primates). In Napier, J., and Napier, P. H. (eds.),Old World Monkeys, Academic Press, New York, pp. 97–137.
Simons, E. L., Kay, R. F., and Fleagle, J. G. (in preparation). A revision of the Oligocene apes of the Fayum Province, Egypt.
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Kay, R.F., Simons, E.L. The ecology of oligocene African anthropoidea. Int J Primatol 1, 21–37 (1980). https://doi.org/10.1007/BF02692256
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DOI: https://doi.org/10.1007/BF02692256