福島県東棚倉地域久保田層から産出するAnadara 属二枚貝化石の形態測定

島根大学地球資源環境学研究報告 Volume 33 Page 75-88 published_at 2015-02-27
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Title
福島県東棚倉地域久保田層から産出するAnadara 属二枚貝化石の形態測定
Title
Morphometric analyses of the genus Anadara (Bivalvia; Arcidae) from the Miocene Kubota Formation in the eastern Tanagura area, Fukushima Prefecture, Northeast Honshu, Japan
Title Transcription
フクシマケン ヒガシ タナグラ チイキ クボタソウ カラ サンシュツ スル Anadara ゾク ニマイガイ カセキ ノ ケイタイ ソクテイ
Creator
Suzuki Takuma
Source Title
島根大学地球資源環境学研究報告
Volume 33
Start Page 75
End Page 88
Journal Identifire
ISSN 13439774
Descriptions
The taxonomic classification of the genus Anadara (Bivalvia) from the Miocene Kubota Formation in the eastern Tanagura area has been controversial in previous studies, because there are wide ranges in its shell variation. The present study conducts morphometric analyses of fossil Anadara collected from three localities (Kamitoyo, Kubota, and Tanaka) of the formation as a basic study to describe the morphologic variation through time and space. As a result, the Kamitoyo population can be distinguished from other two populations by its shell shape and ontogenetic pattern. In turn, morphometric differences between Kubota and Tanaka populations should be resulted from an intraspecific variation because these two populations have a common ontogenetic pattern of the shell-coiling mode. According to ontogenetic parameters of hinge teeth, these three populations are placed in the subgenus Anadara. We distinguish the Kamitoyo population into an independent species Anadara (Anadara) tanakuraensis Noda from the rest two populations belonging to Anadara (Anadara) hataii Noda.
Subjects
Anadara ( Other)
Fukushima Prefecture ( Other)
Kubota Formation ( Other)
Miocene ( Other)
Morphometric analysis ( Other)
Language
jpn
Resource Type departmental bulletin paper
Publisher
島根大学大学院総合理工学研究科地球資源環境学教室
Date of Issued 2015-02-27
Publish Type Version of Record
Access Rights open access
Relation
[NCID] AA11455176