Quarry near Dananzhuang (Cambrian of China)

Where: Jiangsu, China (34.5° N, 117.4° E: paleocoordinates 0.5° S, 149.4° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Redlichia chinensis trilobite zone, Mantou Formation, Series 2 (521.0 - 509.0 Ma)

• "The Mantou Formation ranges from the middle Cambrian Stage 4 to the top of the Wuliuan. This lithostratigraphic unit is characterized by widely distributed siliciclastic deposits in the North China Block." Fossils come from "basal Mantou Formation (Cambrian Stage 4, Series 2)" "All specimens of Vyscystis? spinosa sp. nov. were collected from purple mudstones in the lower part of the Mantou Formation together with numerous hyoliths and trilobites (e.g. Redlichia murakamii). This level occurs in the Redlichia chinensis trilobite Zone, corresponding to the Cambrian Stage 4 in the international global stratigraphic chart "

Environment/lithology: transition zone or lower shoreface; lithified mudstone

• "preserved in a proximal environment of tidal-flat environment (Lee and Chough, 2011). The softground surfaces are developed on a thick purple mudstone interval in both two localities. The surfaces suggest a stabilized substrate including typical soft-substrate epifauna (e.g. echinoderms, hyoliths, brachiopods and trilobites) with few traces and vertical burrows"
• "All specimens of Vyscystis? spinosa sp. nov. were collected from purple mudstones in the lower part of the Mantou Formation." " "fine-grained sediments from the basal Mantou Formation, mostly oriented parallel to the bedding plane. Mudstones often contain thin parallel-laminated silty layers and structureless homogeneous clay after reworking process (Fig. 6A, B). In both localities (Xiaobeiwang and Dananzhaung villages), disarticulated echinoderm fragments are preserved in aggregations with several complete specimens co-occurring with trilobites, brachiopods and hyoliths."

Size class: macrofossils

Preservation: mold/impression

Collection methods: Reposited in Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences (NIGPAS)

Primary reference: D.Z. Wang, M. Nohejlová, Z.X. Sun, H. Zeng, B. Lefebvre, X.L. Yang, and F.C. Zhao. 2024. First report of lepidocystid echinoderm in the Cambrian of North China: Evolutionary and Palaeobiogeographic implications. Palaeogeography, Palaeoclimatology, Palaeoecology 644:112194 [P. Novack-Gottshall/P. Novack-Gottshall]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 235095: authorized by Phil Novack-Gottshall, entered by Phil Novack-Gottshall on 01.06.2024

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Redlichiida - Redlichiidae
"Redlichia murakamii" = Redlichia (Pteroredlichia) murakamii
"Redlichia murakamii" = Redlichia (Pteroredlichia) murakamii Resser and Endo 1937 trilobite
Hyolitha
  -
Hyolitha indet.
Brachiopoda
  -
Brachiopoda indet.
Brachiopoda indet. Cuvier 1805
Lepidocystoidea
  - Lepidocystidae
Vyscystis ? spinosa
Vyscystis ? spinosa Wang et al. 2024