Chapter

Giraffidae

W. Henry Gilbert

in Homo erectus

Published by University of California Press

Published in print April 2009 | ISBN: 9780520251205
Published online March 2012 | e-ISBN: 9780520933774 | DOI: http://dx.doi.org/10.1525/california/9780520251205.003.0007
Giraffidae

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This chapter examines fossil records of giraffids in the Daka Member. Daka Giraffa fossils are of the larger group of Plio-Pleistocene African Giraffa species that includes Giraffa jumae and Giraffa camelopardalis. These species are united by the presence of paired, short ossicones. Remains of Giraffidae include an immature Sivatherium mandible, an immature Sivatherium maxilla, a Sivatherium upper second premolar, a left Sivatherium metatarsal, four Giraffa ossicones, and a complete right Giraffa metacarpal. Sivatheres are very large, relatively short-necked giraffids. Two pairs of ossicones are antler-like and spatulate in males, and absent in females. Sivatheres can be diferentiated from Giraffa based on tooth dimensions, the relative proportions of the cheek tooth row to the whole mandible, absolute size, and ossicone morphology.

Keywords: giraffids; Giraffa; Giraffa jumae; Giraffa camelopardalis; Sivatherium; Sivatheres

Chapter.  3129 words.  Illustrated.

Subjects: Evolutionary Biology

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