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Discovery of a Late Ordovician Foliomena fauna in the Tarim desert, Northwest China

Authors :
Jia Yu Rong
Wen Wei Yuan
Ji Suo Jin
Yan Liang
Yi Wang
Yuandong Zhang
Renbin Zhan
Source :
Palaeoworld. 23:125-142
Publication Year :
2014
Publisher :
Elsevier BV, 2014.

Abstract

A Foliomena fauna is reported for the first time from the Tarim paleoplate, and stratigraphically from the Yinpingshan Formation (upper Katian, Upper Ordovician) of Querqueke, Kuruktag region, northeastern Tarim, southern Xinjiang, Northwest China. The fauna includes seven species of brachiopods, amongst which three are new and four indeterminate: Anomaloglossa ? sp., Orbiculoidea ? sp., Foliomena xinjiangensis n. sp., Sericoidea minuta n. sp., Kassinella tarimensis n. sp., Rostricellula ? sp., and Anazyga ? sp. These species formed a Sericoidea - Kassinella Association, characterized by very small and well-preserved brachiopods, and well-developed laminations in its hosted mudstone, indicating a deep water environment (corresponding to lower BA5 to BA6). The faunal and sedimentological features suggest its affinity to the typical Foliomena faunal group of deep water origin. Numerical analyses show that the Foliomena fauna in late Katian time differentiated into two major paleogeographically related groups, and the Tarim association has a close faunal affinity to the representatives of this fauna in South China, indicating an active faunal exchange between Tarim and South China before the end-Ordovician mass extinction.

Details

ISSN :
1871174X
Volume :
23
Database :
OpenAIRE
Journal :
Palaeoworld
Accession number :
edsair.doi...........c1f9733e289898de09f9bea46b490a5e