書誌事項
- タイトル別名
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- MORPHOLOGICAL STUDIES ON THE SKULL OF THE YEZO BROWN BEAR (URSUS ARCTOS YEZOENSIS Lyd.) : II. OBLITERATION PATTERNS OF SUTURAE AND SYNCHONDROSES OF THE SKULL
- エゾヒグマ ズガイ ノ ケイタイガクテキ ケンキュウ 2 ホウゴウ オヨビ ナンコツ ケツゴウ ノ ショウメツ ジュンイ ニ ツイテ
この論文をさがす
抄録
In the morphological changes of the skulls of tlte Yezo brown bear (Ursus arctosyezoensis Lyd.) showing growth with postnatal development were observed the oblitera-tion patterns of suturae and synchondroses.The materials used in this study were the 56 skulls (36 male and 20 female)described in the previous part of the present series. The closing degrees of suturas andsynchondroses were determined by the method employed by FREDERIC (Table I).In both male and female skulls, the obliteration of sutrae and synchondroses wasobserved earlier in the intraoccipital synchondroses, sutura lambdoidea, and S. sagittalis.It is assumed that the crista sagittalis externa and the linea nuchae superior, which arepeculiar forms of the male adult skull, may have resulted from the ossification of theperiosteum, because tlaey developed cleary after the obliteration of S.lamboidea arndS. sagittalis.As the sex difference in the obliteration of suturae, it was unoticed that S. occipitomastoidea, S. squamosa, and S. sphenosquamosa had been closed later in the maleskulls than in the female.The sutura and synchondrosis which were not closed event in the oldest skull wereS. zygomaticotemporalis and synchorndrosis intersphenoidalis.It is reasonable to consider that the os sphenoidale can be divided into two portions: that is, os sphenoidale anterior and os sphenoidale posterior.In the bear skull, no S. nasomaxillaris has been formed. The same view as merntioned above seems to be observed in the skull of Lagomorplaa and Rodentia.
収録刊行物
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- 日本獸醫學雜誌(The Japanese Journal of Veterinary Science)
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日本獸醫學雜誌(The Japanese Journal of Veterinary Science) 34 (2), 71-78_2, 1972
公益社団法人 日本獣医学会
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詳細情報 詳細情報について
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- CRID
- 1390001206424528384
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- NII論文ID
- 110003980501
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- NII書誌ID
- AN00191788
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- COI
- 1:STN:280:DyaE383jvFGhug%3D%3D
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- ISSN
- 18811442
- 00215295
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- NDL書誌ID
- 7616197
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- PubMed
- 5065268
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- データソース種別
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- JaLC
- IRDB
- NDL
- Crossref
- PubMed
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可