996 Intrageneric variation and temporal change in the internal skeletal stucture of plagiacanthids (Radiolaria) from Hokkaido, Japan

スポンサーリンク

概要

• 論文の詳細を見る

• 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.

• 日本古生物学会の論文
• 1995-12-30

著者

• Funakawa Satoshi

  Department Of Geosciences Faculty Of Science Osaka City University

• Funakawa Satoshi

  Department Of Geoscience Faculty Of Science Osaka City University

関連論文

• Lophophaeninae (Radiolaria) from the Upper Oligocene to Lower Miocene and Intrageneric Variation in Their Internal Skeletal Structures
• 996 Intrageneric variation and temporal change in the internal skeletal stucture of plagiacanthids (Radiolaria) from Hokkaido, Japan

スポンサーリンク