Duibian B, 33.6m (Cambrian of China)

Where: Zhejiang, China (28.8° N, 118.6° E: paleocoordinates 15.3° N, 142.8° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Eolotagnostus trilobite zone, Huayansi Formation, Taoyuanian (498.5 - 485.4 Ma)

• Cambrian Stage 9 (Jiangshanian)

• bed-level stratigraphic resolution

Environment/lithology: slope; lithified limestone

• outermost part of the Jiangnan Slope Belt, adjacent to the Jiangnan Basin
• dark, thin-bedded, argillaceous and laminated limestones; light-colored ribbon limestones are present in places

Size class: macrofossils

Preservation: cast, mold/impression

Primary reference: S. C. Peng, L. E. Babcock, J. X. Zuo, H. L. Lin, X. J. Zhu, X. F. Yang, Y. P. Qi, G. Bagnoli, and L. W. Wang. 2009. Proposed GSSP for the base of Cambrian Stage 9, coinciding with the first appearance of Agnostotes orientalis, at Duibian, Zhejiang, China. Science in China, D Earth Sciences 52(4):434-451 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 128306: authorized by Wolfgang Kiessling, entered by Uta Merkel on 05.06.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Olenida - Aphelaspidae
 Ptychopariida - Elviniidae
Irvingella major Ulrich and Resser 1924 trilobite
 Asaphida - Ceratopygidae
Proceratopyge distensa Lu and Lin 1989 trilobite
Artiopoda
 Agnostida - Spinagnostidae
 Agnostida - Agnostidae
Neoagnostus sp., "Eolotagnostus sp." = Lotagnostus (Eolotagnostus), "Agnostus captiosus" = Homagnostus captiosus
Neoagnostus sp. Kobayashi 1955
"Eolotagnostus sp." = Lotagnostus (Eolotagnostus) Zhou 1982
"Agnostus captiosus" = Homagnostus captiosus Lazarenko 1966
 Agnostida - Diplagnostidae
"Pseudagnostus josepha" = Pseudagnostus josephus Hall 1863