Very old patelliform gastropods from the Early Cambrian of China: Reconsideration of the systematic position of Archaeotremaria

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ABSTRACTArchaeotremaria polytremata Yu from the Lower Cambrian Maidiping Member of the Hongchunping Formation of Sichuan, China, was originally described as a primitive monoplacophoran. A restudy of the holotype and paratype has led to a reconsideration of its systematic position. A. polytremata has a patelliform shell with a series of median-dorsal tremata extending from the apex to the anterior margin and periodic rugae. The species is now reassigned to the Gastropoda, rather than Monoplacophora.

Author(s) Yu Wen
Volume
Records 21 : Part 3
Article Published
2002
Page Number
299

DOI
10.18195/issn.0312-3162.21(3).2002.299-306