. The Ecology of arboreal folivores : a symposium held at the Conservation and Research Center, National Zoological Park, Smithsonian Institution, May 29-31, 1975. Folivores; Forest ecology; Leaves; Mammals; Mammals. Alouatta villosa. Ateles beliebuth Figure 7. Comparison of the lower P4 - M3 dentitions of a, Alouatta villosa; b, Ateles belzebuth. Comparison with Figure 3 illustrates that Alouatta is convergent in molar shape with Propith- ecus and Ateles with Cheirogaleus. The former pair have trenchant shearing blades, high crowns, large crushing surfaces, and acutely angled cusps; the latte
. The Ecology of arboreal folivores : a symposium held at the Conservation and Research Center, National Zoological Park, Smithsonian Institution, May 29-31, 1975. Folivores; Forest ecology; Leaves; Mammals; Mammals. Alouatta villosa. Ateles beliebuth Figure 7. Comparison of the lower P4 - M3 dentitions of a, Alouatta villosa; b, Ateles belzebuth. Comparison with Figure 3 illustrates that Alouatta is convergent in molar shape with Propith- ecus and Ateles with Cheirogaleus. The former pair have trenchant shearing blades, high crowns, large crushing surfaces, and acutely angled cusps; the latter have low rounded cusps and reduced shearing and crushing. what folivorous ancestry for the group. In addition, variations among living species of the group are strongly correlated with corresponding differences in diet (see Figure 7). Based on a previous analysis (Kay, 1973), leaf- eating monkeys would be expected to have larger teeth than fruit-eaters. The reverse, however, often proves to be the case. No special dietary significance can be attributed to the species values of a principal coordi- nates analysis of tooth dimensions regression adjusted for body mass. However, an analysis of tooth-length (rather than body-size) allometrically adjusted di- mensions yields first coordinate values which are Cercococebus torquatus/'-N >.Cor. Ihoesti A. atyS lithecus nig. Itopithecus fol. v Erythrocebus ^ patas Cercocebus . () "~ D (J ... «u,-Ck Oc, m-f OO Papio a„.,bi»^)t\ ' " „ J* Papio uriinui (J / MJcer. / Mandrillus sphinx Papio hamadryas Opapio cynocephalus Firs! Principal Coordinate Figure 8. Principal coordinates analysis of molar shape among African cercopithecids. The first coordinate separates primarily leaf-eating species to the left from primarily fruit-eating species to the right. The triangles are colobines, the circles are cercopith- ecines. The group of Cercopithecines at the center eat large pro- portions of grass.
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Keywords: ., bookcentury1900, bookcolle, booksubjectleaves, booksubjectmammals
