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Issue: Vol. 5396 No. 1: 29 Dec. 2023
Type: Article
Published: 2023-12-29
DOI: 10.11646/zootaxa.5396.1.10
Page range: 50-57
Abstract views: 231
PDF downloaded: 7

A new clam shrimp (Branchiopoda: Diplostraca: Spinicaudata) from the Upper Jurassic in the Jiyuan Basin, China and its biostratigraphic significance

Institute of Palaeontology; Yunnan Key Laboratory of Earth System Science; Yunnan Key Laboratory for Palaeobiology; MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment; Yunnan University; Kunming 650500; China; State Key Laboratory of Palaeobiology and Stratigraphy; Center for Excellence in Life and Paleoenvironment; Nanjing Institute of Geology and Palaeontology; Chinese Academy of Sciences; Nanjing 210008; China
Institute of Palaeontology; Yunnan Key Laboratory of Earth System Science; Yunnan Key Laboratory for Palaeobiology; MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment; Yunnan University; Kunming 650500; China; School of Earth Science; Yunnan University; Kunming 650500; China
Institute of Palaeontology; Yunnan Key Laboratory of Earth System Science; Yunnan Key Laboratory for Palaeobiology; MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment; Yunnan University; Kunming 650500; China; Southwest United Graduate School; Kunming 650092; China
State Key Laboratory of Palaeobiology and Stratigraphy; Center for Excellence in Life and Paleoenvironment; Nanjing Institute of Geology and Palaeontology; Chinese Academy of Sciences; Nanjing 210008; China
State Key Laboratory of Palaeobiology and Stratigraphy; Center for Excellence in Life and Paleoenvironment; Nanjing Institute of Geology and Palaeontology; Chinese Academy of Sciences; Nanjing 210008; China
Crustacea Triglypta jiyuanensis Liao & Huang sp. nov. conchostracans Maao Formation Jurassic Yanliao biota

Abstract

A new spinicaudatan species Triglypta jiyuanensis Liao & Huang sp. nov. is described from the Upper Jurassic Maao Formation in the Jiyuan Basin, northwestern Henan Province, China. The carapace of the new species is ornamented with punctae, linear arrangements of punctae, and radial lirae. The new species differs from those of the early Triglypta forms from the Middle Jurassic but closely resembles T. jianchangensis Wang, 2014 from the Upper Jurassic Tiaojishan Formation of western Liaoning Province. Our study provides new biostratigraphic evidence supporting that the Maao and Tiaojishan formations can be correlated. Moreover, we suggest that the Yangshuzhuang Formation in the Jiyuan Basin could correlate to the Haifanggou and the Longmen formations in the Yanliao area.

 

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