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A New Fossil Tortoise, with Remarks on the Origin of South American Testudinines
Vol. 1971, No. 1 (Mar. 8, 1971), pp. 106-117
Stable URL: http://www.jstor.org/stable/1441604
Page Count: 12
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A new species of land tortoise, Geochelone hesterna is described from late Miocene deposits in Colombia, South America. It is closely related to the extant northern South American species G. denticulata and G. carbonaria, and may have given rise to them. G. gringorum, Miocene of Patagonia, is very close to the extant Gran Chaco tortoise, G. chilensis. Testudinine dispersal to South America must have occurred by the Oligocene. The subgenus Hadrianus is considered a synonym of the subgenus Manouria. The genus Cymatholcus is reduced to a subgenus of Geochelone.