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© Larry Thompson, 2007-2015
· 9
Callicebus moloch, Dusky Titi |
© Larry Thompson, 2007-2015
· 9
Callicebus moloch, Dusky Titi |
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© Larry Thompson, 2007-2015
· 9
Callicebus moloch, Dusky Titi |
© Larry Thompson, 2007-2015
· 8
Callicebus moloch, Dusky Titi |
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© Larry Thompson, 2007-2015
· 6
Callicebus moloch, Dusky Titi |
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Following served from Mammalogy |
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Following served from University of Wisconsin |
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Callicebus
, the titi monkey, is a South American or New World monkey. South American monkeys or platyrrhines comprise one of the two infraorders (Platyrrhini and Catarrhini) of anthropoid primates. They live exclusively in South and Central America, but their fossil distribution includes the Greater Antilles (MacPhee and Horovitz, 2002). The fossil record of platyrrhines extends back to the Deseadan or late Oligocene of Bolivia where they are represented by the genus
Branisella
(Takai and Anaya, 1996). Their presence in the New World is generally considered to be the result of a single dispersal event (Fleagle, 1999) near the end of the Eocene from the Old World, where all known basal anthropoids are found (Beard, 2002). Because South America was not connected with North America or Africa at the time, this dispersal must have involved rafting across some portion of the Atlantic.
Once in the New World, platyrrhines diverged into a variety of forms ranging in size from the smallest living anthropoid (
Cebuella
) at ~110 grams to the howler monkeys (
Alouatta
) that reach 11 kg (Fleagle, 1999). This diverse radiation of primates includes 78 living species (Fleagle, 1999) in 16 genera, one of which is the only living nocturnal anthropoid,
Aotus
. Their diets and locomotor adaptations are diverse, though most are at least partly frugivorous and none are primarily terrestrial.
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Although the adaptations of different genera are reflected in their craniodental anatomy, platyrrhines in general retain a cranial morphology more similar to primitive anthropoids from the Eocene and Oligocene of Egypt such as
Catopithecus
,
Parapithecus
, and
Aegyptopithecus
than do the living Old World anthropoids (Fleagle, 1999; Simons, 2001). The research for which these CT data were collected indicates that this primitive anthropoid cranial morphology included considerable
cranial pneumatization via the paranasal sinuses.
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Callicebus moloch
and
C. torquatus
are two of the larger species of titi monkeys. Both weigh around 1 kilogram, with males and females nearly equal in size (Fleagle, 1999). These monogamous and largely frugivorous monkeys live throughout Peru, Venezuela, Colombia, and Brazil (Fleagle, 1999). The precise phylogenetic position of
Callicebus
is uncertain but it is usually considered a close relative of
Aotus
(Ford, 1986), the Pitheciinae (Kay, 1994; Horovitz, 1999), or both (Rosenberger, 2002).
About the Species
This male specimen, the skull of an adult (all dentition in place), was obtained from the
National Zoo
, Washington D.C. on 26 July 1940. It was made available to The University of Texas High-Resolution X-ray CT Facility for scanning by
Dr. James Rossie
of Stony Brook University, courtesy of the
Smithsonian Institution Division of Mammals
. Scanning was funded by an NSF dissertation improvement grant to Mr. Rossie (#0100825). Funding for image processing was provided by a National Science Foundation
Digital Libraries Initiative
grant to
Dr. Timothy Rowe
of The University of Texas at Austin.
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dorsal view |
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lateral view |
About this Specimen
This specimen was scanned by
Matthew Colbert
on 6 March 2002 along the coronal axis for a total of 438 slices. Each slice is 0.1528 mm thick, with an interslice spacing of 0.1528 mm and a field of reconstruction of 63.0 mm.
About the
Scan
Literature
Beard, K. C. 2002. Basal anthropoids. In (W. C. Hartwig, Ed) The Primate Fossil Record, pp. 133-149. Cambridge, Cambridge University Press.
Fleagle, J. G. 1999. Primate Adaptation and Evolution. San Diego, Academic Press.
Ford, S. M. 1986. Systematics of the New World monkeys. In (D. R. Swindler & J. Erwin, Eds) Comparative Primate Biology, Vol. 1: Systematics, Evolution and Anatomy, pp. 73-135. New York, Alan R. Liss, Inc.
Horovitz, I. 1999. A phylogenetic study of living and fossil platyrrhines. American Museum Novitates 3269:1-40.
Kay, R. F. 1994. "Giant" tamarin from the Miocene of Columbia. Am J. Phys. Anthrop. 95, 333-353.
MacPhee, R. D. E. and I. Horovitz. 2002. Extinct Quaternary platyrrhines of the Greater Antilles and Brazil. In (W. C. Hartwig, Ed) The Primate Fossil Record, pp. 189-200. Cambridge, Cambridge University Press.
Rosenberger, A. L. 2002. Platyrrhine paleontology and systematics: The paradigm shifts. In (W. C. Hartwig, Ed) The Primate Fossil Record, pp. 151-159. Cambridge, Cambridge University Press.
Simons, E. L. 2001.
The cranium of
Parapithecus grangeri
, an Egyptian Oligocene anthropoidean primate. Proceedings of the National Academy of Sciences, USA 98:7892-7897.
Takai, M. and F. Anaya. 1996.
New specimens of the oldest fossil platyrrhine,
Branisella boliviana
, from Salla, Bolivia. American Journal of Physical Anthropology 99:301-317.
Links
Mammalian Species account
of
Callicebus moloch
(American Society of Mammalogists)
Callicebus moloch
on the
Primate Info Net
(University of Wisconsin, Madison)
Images of
Callicebus
on the
Wisconsin Regional Primate Research Center
website (University of Wisconsin, Madison)
Callicebus moloch
on the
Animal Diversity Web
(University of Michigan Museum of Zoology)
Literature
& Links
Face slice movie:
Additional
Imagery 
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To cite this page:
Dr. James Rossie, 2002, "Callicebus moloch" (On-line), Digital Morphology. Accessed June 3, 2023 at http://digimorph.org/specimens/Callicebus_moloch/269827/.
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