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730. NEOGENE MICROFOSSILS OF CHLOROPHYCEAE, PRASINOPHYCEAE AND ACRITARCHS FROM NIIGATA, CENTRAL JAPAN


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Title: 730. NEOGENE MICROFOSSILS OF CHLOROPHYCEAE, PRASINOPHYCEAE AND ACRITARCHS FROM NIIGATA, CENTRAL JAPAN
Other Titles: 730. 中部日本新潟産緑藻綱, プラシノ藻綱, アクリターチの新第三紀微化石
Authors: Takahashi, Kiyoshi / Matsuoka, Kazumi
Authors (alternative): 高橋, 清 / 松岡, 數充
Issue Date: 15-Jul-1981
Publisher: 日本古生物学会
Citation: Transactions and proceedings of the Palaeontological Society of Japan. New series. 1981, 122, p.105-121
Abstract: 新潟地方の新第三紀層産緑藻綱, プラシノ藻綱およびアクリターチの微小プランクトンに関する報告である。8つの形態属に属する緑藻綱の2種と2亜種, プラシノ藻綱の1種およびアクリターチの8種が記載・図示された。それらはTytthodiscus densiporosus n. sp. subsp. densiporosus n. subsp., T. densiporosus n. sp. subsp. minus n. subsp., Palambages sp., Pterospermella pterina n. sp., Leiosphaeridia cf. fastigatirugosa (STAPLIN) DOWNIE & SARJEANT, L. grandiformis n. sp., L. minuscula n, sp., Lancettopsis sp., Micrhystridium ariakense TAKAHASHI, Baltisphaeridium sphaeroides n. sp., B. nakajoense n. sp.およびCymatiosphaera pulchella n. sp.である。Tytthodiscus属, Crassosphaera属, Pleurozonaria属, Tasmanites属およびLeiosphaeridia属の形態的特徴について述べた。パーク他(1978)によれば, 化石属Pterospermellaは現生属Pterospermaと同義であるが, 筆者等はPterospermellaを受入れる考えである。この論文に記載された, これらの植物性微小プランクトンは日本海周辺の新第三紀層における層位学的および地理学的分布の基礎知識に重要である。 / This is a report on the microplankton of the Chlorophyceae, Prasinophyceae and acritarchs from the Neogene sediments in the Niigata district, central Japan. Two species and two subspecies of the Chlorophyceae, one of the Parsinophyceae and eight of the acritarchs belonging to eight form genera are described and illustrated : Tytthodiscus densiporosus n. sp. subsp. densiporosus n. subsp., T. densiporosus n. sp. subsp. minus n. subsp., Palambages sp., Pterospermella pterina n. sp., Leiosphaeridia cf. fastigatirugosa (STAPLIN) DOWNIE & SARJEANT, L. grandiformis n. sp., L. minuscula n. sp., Lancettopsis sp., Micrhystridium ariakense TAKAHASHI, Baltisphaeridium sphaeroides n. sp., B. nakajoense n. sp. and Cymatiosphaera pulchella n. sp. Morphological characteristics of the genera Tytthodiscus, Crassosphaera, Pleurozonaria, Tasmanites and Leiosphaeridia are discussed. According to PARKE et al. (1978), the fossil genus Pterospermella is a synonym of the recent genus Pterosperma, but the authors are inclined to accept the genus Pterospermella. These phytomicroplankton described in this paper are important for a basic knowledge of their stratigraphic and geographic distribution in the Neogene formations around the Sea of Japan.
URI: http://hdl.handle.net/10069/16853
ISSN: 00310204
Relational Links: http://ci.nii.ac.jp/naid/110002703126/
Rights: 日本古生物学会 / 本文データは学協会の許諾に基づきCiNiiから複製したものである
Type: Journal Article
Text Version: publisher
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/16853

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