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D2700, also known as Skull 3, is the catalogue number of a fossilized ''Homo georgicus'' skull which was discovered in 2001 in Dmanisi, Georgia. It is an almost complete skull and is in an exceptionally good condition.〔(【引用サイトリンク】url=http://www.talkorigins.org/faqs/homs/d2700.html )〕 Since the publication of the Dmanisi skull 5 in 2013, all of the five Dmanisi skulls (Skull 3 included) are involved in a paleontological controversy: many hominin fossils thought to be of different species, such as ''Homo ergaster'' or ''Homo habilis'', may not be separate species after all. Most human ancestors were possibly one evolving lineage.〔(Skull suggests three early human species were one : Nature News & Comment )〕 == Discovery == D2700 and D2735 were found in 2001, just a decade later after the first discovery of an early hominin mandible D211 at Dmanisi on September 24, 1991. In 1999, partial crania D2280 and D2282 were discovered. Cranium D2282 is likely the accompanying skull to mandible D211 and to be the remains of a young adult around 18–20 years old. Skull D2280 is inferred to have been an adult around 25–30 years old at the time of death. Moreover, in 2005, a new complete skull cranium was found: D4500. This cranium is inferred to be an adult skull and is more commonly known as “Skull 5.” D4500’s features are very rare compared to early ''Homo'' in that it had a small braincase yet an unusually large prognathic face. “Skull 5” has an accompanying mandible, D2600, which was found in 2000. In 1999 two other skulls had been found at the same site—D2280 and D2282. D2280 was a near-complete brain-case with 780 cc brain-size. D2282 was a cranium and it included many of the facial and upper jaw bones. Its brain size was about 650 cc.〔 In 1991 and 2000, two more lower jaws D211 and D2600 were discovered from the same site. 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「Dmanisi skull 3」の詳細全文を読む スポンサード リンク
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