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Chelonoidis donfaustoi
''Chelonoidis donfaustoi'' (commonly known as the eastern Santa Cruz tortoise) is a species of Galápagos tortoise living on Santa Cruz Island, within the Galápagos. Until 2015, ''C. donfaustoi'' was classified as part of another species, ''Chelonoidis porteri''.
==Tortoise populations on Santa Cruz Island==
Earlier mitochondrial DNA studies of tortoises on Santa Cruz showed up to three genetically distinct lineages found in nonoverlapping population distributions around the regions of Cerro Monturra in the northwest, Cerro Fatal in the east, and La Reserva (or La Caseta) in the southwest. Although traditionally classified together, the lineages were all shown to be more closely related to tortoises on other islands than to each other, and thus are thought to be the result of three separate colonizations of the island. Cerro Monturra tortoises are most closely related to ''duncanensis'' tortoises from Pinzón, Cerro Fatal to ''chathamensis'' from San Cristóbal,〔 while Reserva tortoises are closer to the four southern races of Isabela.〔 Tortoises are aided in oceanic dispersal by their ability to float with their heads up, and to survive up to six months without food or water.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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