Intrageneric variation and temporal change in the internal skeletal structure of plagiacanthids(Radiolaria)from Hokkaido,Japan
書誌事項
- タイトル別名
-
- 996 Intrageneric variation and temporal change in the internal skeletal stucture of plagiacanthids (Radiolaria) from Hokkaido, Japan
- Intrageneric variation and temporal cha
この論文をさがす
抄録
From the Kawakami Group (the Upper Oligocene to Lower Miocene) of eastern Hokkaido, five new species of Clathromitrinae, including three of Corythomelissa, one of Euscenarium and one of Lithomelissa, are described, placing emphasis on their internal skeletal structure. In addition, one species of Clathromitrinae from the Taiki Formation (the Upper Miocene) of eastern Hokkaido is also examined. Some intraspecific and intrageneric variations are recognized in the internal skeletal structure of Corythomelissa. The intrageneric variations have three tendencies over time : (1) the prolongation of L-Rd; (2) the rising of connecting archers on the dorsal side of the shell; (3) the decline of A'. These intrageneric variations show a general trend through Late Oligocene to Late Miocene time which represents the evolutionary lineage of Corythomelissa.
収録刊行物
-
- Transactions and proceedings of the Paleontological Society of Japan. New series
-
Transactions and proceedings of the Paleontological Society of Japan. New series 1995 (180), 208-225, 1995
日本古生物学会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390282680410483456
-
- NII論文ID
- 110002703403
-
- NII書誌ID
- AA00867896
-
- ISSN
- 21860963
- 00310204
-
- NDL書誌ID
- 3916079
-
- 本文言語コード
- en
-
- 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