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eastern gorilla
The eastern gorilla (''Gorilla beringei'') is a species of the genus ''Gorilla'' and the largest living primate. At present, the species is subdivided into two subspecies. The eastern lowland gorilla (''G. b. graueri'') is the most populous, at about 5,000 individuals.〔: "The Eastern Lowland Gorilla population in the DRC has plummeted dramatically over the last 10 years, with probably only about 5,000 of the formerly 17,000 animals remaining."〕 The mountain gorilla (''G. b. beringei'') has only about 700 individuals. In addition, scientists are considering elevating the Bwindi gorilla population (which numbers about half of the mountain gorilla population) to the rank of subspecies.
== Taxonomy and phylogeny ==
There are at least two subspecies of the eastern gorilla: the mountain gorilla (''Gorilla beringei beringei'') of the volcanic slopes of Rwanda, Uganda and eastern Democratic Republic of Congo; and the eastern lowland gorilla (''Gorilla beringei graueri'') of the lowlands of eastern Democratic Republic of Congo and Uganda. A small population from the Bwindi Impenetrable Forest in southern Uganda and adjacent areas in Congo differs genetically from the other subspecies, and is therefore often considered as a separate, yet undescribed, subspecies.
The eastern lowland gorilla and mountain gorilla were previously thought to be two of the three subspecies of one single species, the gorilla (''Gorilla gorilla''). However, genetic research has shown that the two eastern subspecies are far more closely related than the western subspecies: the western lowland gorilla (''G. gorilla gorilla''), which justified the separate classification. The two eastern subspecies are now classified as ''G. beringei''.
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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