Morphological comparisons between three species of the Ryukyu spiny rats

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Skulls of the three species of Ryukyu spiny rats (<i>Tokudaia osimensis</i>, <i>T. tokunoshimensis</i> and <i>T. muenninki</i>) were osteometrically compared. In all measurements the size tendencies in which <i>T. tokunoshimensis</i> was the largest, <i>T. muenninki</i> middle, and <i>T. osimensis</i> the smallest were confirmed. However, the lengths of the molar row were exceptionally the largest in <i>T. muenninki</i>, middle in <i>T. tokunoshimensis</i> and the smallest in <i>T. osimensis</i>. The raw measurement data obviously indicated significant differences in size among the three species. We demonstrated that the neurocranium was larger in <i>T. osimensis</i> than in <i>T. muenninki</i> from the results of the proportional analyses. The principal component analyses using the raw measurement data also pointed out that the skulls from the three species were obviously distinguished in the charts, although the plots were not completely separated by the principal component analysis using the proportional indices. The CT images showed that both maxilla and palatine bone were thinner near the greater palatine foramen area and pointed out that the characteristic palatine structure fixed the position of the greater palatine foramen in each species of <i>Tokudaia</i>.<br>

収録刊行物

  • Mammal study = The Continuation of the Journal of the Mammalogical Society of Japan

    Mammal study = The Continuation of the Journal of the Mammalogical Society of Japan 33(1), 1-10, 2008-06-01

    日本哺乳類学会

参考文献:  14件中 1-14件 を表示

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    10021103054
  • NII書誌ID(NCID)
    AA11185060
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13434152
  • NDL 記事登録ID
    9440893
  • NDL 雑誌分類
    ZR4(科学技術--生物学--動物)
  • NDL 請求記号
    Z54-G149
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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