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''Palaeospheniscus gracilis'' is a species of the extinct penguin genus ''Palaeospheniscus''. It is the smallest species of its genus, with a height of 40–60 cm. Average individuals, thus, were about the size of the Galapagos penguin. This species was long believed to have first been found in Early Oligocene deposits. However, it seems that the type specimen, a tarsometatarsus, was recovered not from Early Oligocene rocks, but was found on top of them, having been displaced there from a later stratum. The location where the bone was found seems to have been near Cabeza Blanca. At any rate, all later specimens were found in the Early Miocene Patagonian Molasse Formation; those that have locality data are from the area around Trelew and Gaiman in Chubut Province, Argentina. Some recent researchers have suggested that this species should be considered a synonym of ''Palaeospheniscus bergi''. ==References== * Ameghino, Florentino (1899): (of ''Palaeospheniscus gracilis'' ). ''In: Sinopsis geologico-paleontologica (Segundo censo de la República Argentina). Suplemento.'': 9. La Plata: La Libertad. * Simpson, George Gaylord (1946): Fossil penguins. ''Bull. Am. Mus. Nat. Hist.'' 87: 7-99. (PDF fulltext ) * Simpson, George Gaylord (1971): Conspectus of Patagonian fossil penguins. ''American Museum Novitates'' 2488: 1-37. (PDF fulltext ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Palaeospheniscus gracilis」の詳細全文を読む スポンサード リンク
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