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A NEW GENUS AND SPECIES OF PROTOCONULARIIDS FROM EARLY CAMBRIAN IN THE SOUTHERN SHAANXI,CHINA

Yunhuan Liu

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Abstract

Pentaconularia ningqiangensis gen.et sp.nov.of protoconulariids is found from the Kuanchuanpu Member,Dongying Formation near the Sinian-Cambrian boundary in Ningqiang County,Shaanxi Province.The classification of early protoconulariids is revised again referring to the protoconulariids of two-radial-symmetry forms,three-radial-symmetry and four-radial-symmetry forms.The discovery of the new form improve our knowledge of diversity for protoconulariids.

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What this paper is about

Pentaconularia ningqiangensis gen.et sp.nov.of protoconulariids is found from the Kuanchuanpu Member,Dongying Formation near the Sinian-Cambrian boundary in Ningqiang County,Shaanxi Province.The classification of early protoconulariids is revised again referring to the protoconulariids of two-radial-symmetry forms,three-radial-symmetry and four-radial-symmetry forms.The discovery of the new form improve our knowledge of diversity for protoconulariids.

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Available abstract

Pentaconularia ningqiangensis gen.et sp.nov.of protoconulariids is found from the Kuanchuanpu Member,Dongying Formation near the Sinian-Cambrian boundary in Ningqiang County,Shaanxi Province.The classification of early protoconulariids is revised again referring to the protoconulariids of two-radial-symmetry forms,three-radial-symmetry and four-radial-symmetry forms.The discovery of the new form improve our knowledge of diversity for protoconulariids.

Key concepts: Paleontology, Symmetry in biology, Genus, Geology, Symmetry (geometry), China, Boundary (topology), Geography

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