ニホンアシカ<I>Zalophus californianus japonicus</I>の頭骨の新資料について

• 伊藤 徹魯

  岐阜歯科大学解剖学教室

書誌事項

タイトル別名

• New Cranial Materials of the Japanese Sea Lion, <I>Zalophus californianus japonicus</I> (Peters, 1866)
• ニホンアシカZalophus californianus japonicus

抄録

New cranial materials of the Japanese sea lion, Zalophus californianus japonicus (PETERS, 1866), were studied, and cranial measurements, number of postcanine teeth and degree of suture closure in skull were examined in seven skulls and eight halves of mandible of the sea lion, excavated in 1950 at the Aonae Site in Okushiri Island, Hokkaido (Tables 1 and 2) . The present specimens were judged to be skulls of full-grown male Zalophus, and were identified as the species already known as the Japanese sea lion. It was found that the Japanese skulls are larger in size and wider in proportion to their length in a few measurements than the Californian ones, Z. c. californianus (LESSON, 1828) and the Galapagos ones, Z. c. wollebaeki SIVERTSEN, 1953, and also have a larger number in upper postcanine teeth than the former. Accordingly it seems neccessary to reexamine the classification of the Japanese sea lion in detail.

収録刊行物

• 哺乳動物学雑誌: The Journal of the Mammalogical Society of Japan

  哺乳動物学雑誌: The Journal of the Mammalogical Society of Japan 10 (3), 135-148, 1985

  日本哺乳類学会

詳細情報

• CRID: 1390282680140272768
• NII論文ID: 130001817855
• NII書誌ID: AN00231634
• DOI: 10.11238/jmammsocjapan1952.10.135
• ISSN: 1884393X
• ISSN: 05460670
• NDL書誌ID: 3022457
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3022457
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可