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タイトルヨミ
キスイセイ シジミルイ 2シュルイ ノ カクタイ ナイブ コウゾウ
日本語以外のタイトル
Internal Shell Microstructure of Two Species of Japanese Brackish-water Corbiculids
ファイル
言語
日本語
著者
小林 巖雄
髙安 克已
内容記述(抄録等)
Shell microstructures of brackish-water bivalvian molluscs were examined by the use of light and scanning electron microscopes. The species examined were Corbicula japonica and Geloina coexans, Corbiculidae.
  Their layer structures are discriminated into a periostracum and a calcareous shell layer. The latter is subdivided into two layers, namely outer and inner layers, and moreover, has myostracum.
  In the shell of Corbicula japonica the calcareous shell layer is composed of the outer finely crossed lamellar and inner complex crossed lamellar layers. The thicker inner layer near the umbonal side has fine canal structure. In the shell of Geloina coaxans the periostracum is also subdivided into four sublayers under light microscopy and intruded into outer calcareous shell layer at some places. The calcareous shell layer consists of the outer crossed lamellar and inner complex crossed lamellar layers. Their shell layers are made of calcium carbonate mineral, aragonite.
  Growih structure is well marked in calcareous shell layers , composed of wider dark and narrower light bands arrenged alternatively. The texture of each morphological shell structure is not cutted by any their bands. The growih bands of Geloina is more clear than those of Corbicula . The cause of their differences is due to environmental effects.
主題
Corbicula japonica
Geloina coaxans
shell structure
growih line
aragonite
掲載誌名
Laguna : 汽水域研究
2
開始ページ
33
終了ページ
51
ISSN
21852995
発行日
1995-03
NCID
AN10439529
出版者
島根大学汽水域研究センター
資料タイプ
紀要論文
ファイル形式
PDF
著者版/出版社版
出版社版
部局
研究・学術情報本部 エスチュアリー研究センター
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