Hofmann, M. I., Schradin, C. and Geissmann, T. (2007). Radiographic evaluation of neonatal skeletal development in Callimico goeldii reveals closer similarity to Callithrix jacchus than to Saguinus oedipus. American Journal of Primatology 69: 420-433.
Maria Ines Hofmann1, Carsten Schradin2 and Thomas Geissmann3
1 Institute of Anatomy,
University of Zürich, Switzerland
2 School of Animal, Plant and Environmental Sciences, University of the
Witwatersrand, Johannesburg, South Africa
3 Anthropological Institute, University of Zürich, Switzerland
Key Words: ossification centers, radiography,
Callitrichidae, Callimico goeldii, Callithrix jacchus, Saguinus
oedipus.
Abstract: The phylogenetic affinities of the neotropical Goeldi’s monkey (Callimico
goeldii) have long been a matter of debate. Whereas most morphological evidence
appears to place Callimico in a sister group position relative to the Callitrichidae,
genetic studies place C. goeldii within the Callitrichidae and suggest that
it is more closely related to marmosets than to tamarins. The present study presents
the first radiographic analysis comparing the secondary limb bone ossification of
newborn C. goeldii with representatives of the marmosets (Callithrix jacchus)
and tamarins (Saguinus oedipus). The state of secondary ossification of the
epiphysis and short bones is classified into three different ontogenetic stages.
Our results reveal that in terms of the number of ossification centers, C. goeldii
is significantly closer to C. jacchus than to S. oedipus. This is the
first morphological study to support the findings of molecular studies, and the results
suggest that C. goeldii is more closely related to marmosets than to tamarins.
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