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Issue: Vol. 5660 No. 4: 11 Jul. 2025
Type: Article
Published: 2025-07-11
DOI: 10.11646/zootaxa.5660.4.6
Page range: 560-572
Abstract views: 68
PDF downloaded: 0

First report of the non-marine ostracod fauna from the Lower Cretaceous Xiaonangou Formation of the Baishan Basin, NE China

State Key Laboratory of Palaeobiology and Stratigraphy; Nanjing Institute of Geology and Palaeontology; Chinese Academy of Sciences; 39 East Beijing Road; Nanjing 210008; China
Crustacea Mongolocypris Jilin Province early Albian North China Craton

Abstract

The non-marine ostracod fauna from the Xiaonangou Formation in the Baishan Basin is described in detail and illustrated for the first time. Eight samples from the Guanghuanjie-Yumuqiaozi section were analyzed, and seven taxa were identified, including Cypridea sp., Mongolocypris shai sp. nov., Lycopterocypris sinuolata, Lycopterocypris sp., Candona praevara, Candonidae gen. indet. sp. and Cyclocypris invalida. This comprehensive taxonomic study not only enhances our understanding of Cretaceous non-marine ostracods in China but also provides the first precise age constraint for the Xiaonangou Formation using ostracod biostratigraphic correlation. Based on ostracod biostratigraphic correlation, the age of the Xiaonangou Formation has been identified as early Albian. Additionally, this study supports the hypothesis of invertebrate faunal exchange in northeastern China during the Early Cretaceous.

 

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How to Cite

Wang, Y. (2025) First report of the non-marine ostracod fauna from the Lower Cretaceous Xiaonangou Formation of the Baishan Basin, NE China. Zootaxa, 5660 (4), 560–572. https://doi.org/10.11646/zootaxa.5660.4.6