Middle Eocene molluscan fossils from the Siju Formation of the Garo Hills, Meghalaya, India

IF 0.5 4区地球科学 Q4 PALEONTOLOGY Journal of the Palaeontological Society of India Pub Date : 2024-06-09 DOI:10.1177/05529360241254917

Y. R. Singh, Sh. Priyokumar Singh, K. B. Devi, W. A. Singh, Ningthoujam Surdas Singh

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Abstract

Bivalves and Gastropoda are collected from the Siju Formation of South Garo Hills, Meghalaya, India. Eighteen molluscan taxa are recorded, that is, nine taxa of bivalves and nine taxa of gastropods. These are comprising Ostrea ( Ostrea) adbasaensis, Lucina rakhiensis, Lucina ( Lucina) yawensis, Trachycardium minbuense, Mactra ( Mactra) protoreevesii, Pitar ( Calpitaria) carteri, Paphia ( Callistotapes) pseudoliratus, Tellina ( Peronaea) planta, Corbula ( Bicorbula) praexarata, Natica coxi, Seila stracheyi, Euspira soriensis, Semicassis mekranica, Oliva ( Strephona) australis var. indica, Conus ( Lithoconus) kyudawonensis. Dolium ( Eudolium) arabicum, Gistortia ( Vicetia) depressa and Planorbis sp. The detailed systematic description of the present molluscan fossils is studied. One zone is established, that is, Lucina yawensis– E. soriensis zone, for correlation purpose and dating. Overall, the zone is based on the total range of molluscan species and name accordingly. The present zone has been assigned to Middle Eocene in age.

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印度梅加拉亚邦加罗山斯居地层的中始新世软体动物化石

双壳类和腹足类采集自印度梅加拉亚邦南加罗山的四柱地层。共记录了 18 个软体动物类群，即 9 个双壳类群和 9 个腹足类群。其中包括 Ostrea ( Ostrea) adbasaensis、Lucina rakhiensis、Lucina ( Lucina) yawensis、Trachycardium minbuense、Mactra ( Mactra) protoreevesii、Pitar ( Calpitaria) carteri、Paphia ( Callistotapes) pseudoliratus、Tellina ( Peronaea) planta、Corbula ( Bicorbula) praexarata、Natica coxi、Seila stracheyi、Euspira soriensis、Semicassis mekranica、Oliva ( Strephona) australis var.indica、Conus ( Lithoconus) kyudawonensis。Dolium ( Eudolium) arabicum、Gistortia ( Vicetia) depressa 和 Planorbis sp.对目前的软体动物化石进行了详细的系统描述研究。建立了一个区域，即 Lucina yawensis- E. soriensis 区域，以进行相关性研究和年代测定。总体而言，该区是根据软体动物的总种类范围而命名的。本区的年代被定为中始新世。

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来源期刊

Journal of the Palaeontological Society of India PALEONTOLOGY-

CiteScore

1.10

自引率

16.70%

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期刊介绍： The journal is devoted to the publication of original papers and review articles dealing with all aspects of Paleontology, Paleobotany, Stratigraphy, Geochronology, Anthropology and Pre-history.