Researchers say that the giant tortoises on San Cristóbal Island are a new species. They say the earlier name given to the living animals describes tortoises that completely disappeared years ago.
Scientist Report New Tortoise Species on Galapagos Islands

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A tortoise, previously identified as Chelonoidis chathamensis and which corresponds genetically to a different species according to a study by scientists of the Galapagos National Park, is pictured on the island of San Cristobal, Galapagos Islands, Ecuado

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A tortoise, previously identified as Chelonoidis chathamensis and which corresponds genetically to a different species according to a study by scientists of the Galapagos National Park, is pictured on the island of San Cristobal, Galapagos Islands, Ecuado

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A tortoise, previously identified as Chelonoidis chathamensis and which corresponds genetically to a different species according to a study by scientists of the Galapagos National Park, is pictured on the island of San Cristobal, Galapagos Islands, Ecuado

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Tortoises, previously identified as Chelonoidis chathamensis and which correspond genetically to a different species according to a study by scientists of the Galapagos National Park, are pictured on the island of San Cristobal, Galapagos Islands, Ecuador