Critical Issues in Cebine Evolution and Behavior

Abstract

Cebru and Sf~imiri, together with Callicebus and Aotus, represent four genera of* New World monkeys whose unresolved taxonomic position has served to muddle plar yr-rhine cladistics. Their affin~ties remain somewhat problematic (Schneider and Rosenber-ger, this volume), aithough we argue that in the past 20 years, new molecular, genctic, morphological and behavioral analyses have narrowed the range of possible explanations regarding Cebus and Suimiri, in particular. Here, we attempt to clarify cebine evolutionary relationships and outline some interesting and relevant directions for future studies in be-havior and ecology.