Mandibular tooth root size in modern Japanese, prehistoric Jomon, and Late Pleistocene Minatogawa human fossils

• SUWA GEN

  The University Museum, The University of Tokyo, Tokyo

• FUKASE HITOSHI

  Department of Human Biology and Anatomy, Faculty of Medicine, University of the Ryukyus, Nishihara

• KONO REIKO T.

  Department of Anthropology, National Museum of Nature and Science, Tokyo

• KUBO DAISUKE

  Department of Biological Sciences, The University of Tokyo, Tokyo

• FUJITA MASAKI

  Okinawa Prefectural Museum and Art Museum, Naha

抄録

Although dental size and morphology have contributed to population history studies in Japan, little attention has been paid to root size and dimensions. We report here computer tomography (CT)-based metrics of mandibular tooth roots in modern Japanese, Holocene Jomon, and Late Pleistocene Minatogawa human fossils (15000–20000 BP). Our results confirmed that, in terms of both mesiodistal cervical diameters and root lengths, the Jomon is overall smaller-toothed, with summed mesiodistal cervical diameters 4% smaller than in the modern Japanese. However, no significant differences were found in the M₁, in both cervical diameter and root length. These results are comparable to the crown size differences reported in the two populations. There were no significant differences in root proportions (root length relative to cervical diameter) between the Jomon and the modern Japanese in each tooth element from I₁ to M₁, while an allometric root length reduction was observed in the M₂ and M₃ of the modern Japanese. This reflects distinct patterns of dental reduction in the two populations. The Late Pleistocene Minatogawa fossils were found to have larger cervical diameters and root lengths than either the modern Japanese or the Jomon, in some respects approximating the large-toothed Australian and/or earlier Late Pleistocene Homo sapiens conditions. This indicates a largely conservative dental system retained in the Minatogawa fossils, distinct from the Jomon condition.<br>

収録刊行物

• Ａｎｔｈｒｏｐｏｌｏｇｉｃａｌ　Ｓｃｉｅｎｃｅ

  Ａｎｔｈｒｏｐｏｌｏｇｉｃａｌ　Ｓｃｉｅｎｃｅ 119 (2), 159-171, 2011

  一班社団法人　日本人類学会

キーワード

• Minatogawa
• Jomon
• tooth root size
• micro-CT
• Late Pleistocene

詳細情報

• CRID: 1390282679287144064
• NII論文ID: 10029569612
• NII書誌ID: AA11307827
• DOI: 10.1537/ase.110617
• ISSN: 13488570
• ISSN: 09187960
• NDL書誌ID: 11212839
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11212839
• Web Site: http://www.jstage.jst.go.jp/article/ase/119/2/119_110617/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可