| The Changhsingian small foraminifers from the Gyanyima section
in southern Tibet, China |
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| 关键词:Changhsingian small foraminifers southern Tibet |
| 基金项目: |
| 作者 | 单位 | E-mail | | WANG Yue | LPS, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China | yuewang@nigpas.ac.cn | | Katsumi UENO | Department of Earth System Science, Fukuoka University, Fukuoka 814-0180 Japan | | | CAO Chang-qun | LPS, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China | | | ZHANG Yi-chun | LPS, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China | |
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| The Changhsingian small foraminifers from the Gyanyima sectionin southern Tibet, China |
| The Gyanyima section is located in the Himala-yan Tethys Zone, just south of the Indus-Tsangbo su-ture. The Permian part of the section is made up of grayish to reddish white reefal limestone that yields rich warm-water faunas of Changhsingian age. We recently found highly diversified smaller foraminifers dominated by Colaniella parva in association with the genera Pachyphloia, Frondina, Nodosaria, Robuloides, Geinitzina, Tetrataxis, Tuberitina, Abadehella, Cli-macammina, Dagmarita, Postendothyra, Neoendo-thyra, Globivalvulina, Paraglobivalvulina, Agatham-mina, Multidiscus, and Kamurana. In comparison, fusulinoideans are a minor element of the fauna and include Nankinella, Staffella, Reichelina pulchra, and Codonofusiella?. In addition to these fusulinoideans, a new boultoniid genus is found in the upper part of the section. This form shares some similarities with Codonofusiella and Parananlingella in its un-coiling or loose-coiling tendency in the last volution, but it is distinct from these two boultoniid genera in having a rapidly expanding but fully coiled last half volution. |
| WANG Yue,Katsumi UENO,CAO Chang-qun,ZHANG Yi-chun.2009.The Changhsingian small foraminifers from the Gyanyima sectionin southern Tibet, China[J].Acta Geoscientica Sinica,30(S1):87. |
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