, Volume 21, Issue 1, pp 31-43

Callitrichids as phyletic dwarfs, and the place of the callitrichidae in platyrrhini

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Abstract

Cebuella, Callithrix, Leontopithecus, andSaguinus share five distinguishing features. All of these features are best interpreted as derived character states within Platyrrhini, and these animals are phyletic dwarfs. These derived traits may form a single complex that evolved as a result of dwarfing. Two changes in the dentition are shown to be correlated with dwarfing in mammals. These four platyrrhine genera may or may not form a monophyletic group. It is suggested thatCallimico is an “incipient dwarf platyrrhine.” Causes of dwarfing in mammals are discussed.