Wuding [Yuanshan Fm (formerly Qiongzhusi)] (Cambrian of China)

Also known as Chengjiang biota

Where: Yunnan, China (25.5° N, 102.4° E: paleocoordinates 34.7° N, 161.8° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Yuanshan Formation, Atdabanian (521.0 - 516.0 Ma)

• LITHOSTRATIGRAPHY: Formerly from the Yuanshan Mbr, Qiongzhusi Fm. Yuanshan is raised to formation rank in recent publications (Steiner 2005, 2007). AGE: Qiongzhusian in Steiner (2005); correlates to Atdabanian (Steiner, 2007). STRATIGRAPHIC POSITION: From the upper Yuanshan Fm.

• member-level stratigraphic resolution

Environment/lithology: marine; lithified, gray, green, yellow, carbonaceous mudstone

• "benthic sediment flows... are believed to have been the the principal method of burial" (Shu et al. 1999b)

•"presence of agglutinated quartz grains, substantially coarser than the surrounding matrix... suggests... that the animal inhabited a higher-energy, sandy sea floor and was transported" (Shu et al. 2001)

• LITHOLOGY: Dark grey-green (yellow, when weathered), finely laminated mudstones, containing organic hash in great quantity. LITHIFICATION: Lithified, on the basis of figures.

Size class: macrofossils

Preservation: adpression, soft parts

Collection methods: surface (in situ),

• COLLECTOR: Multiple collectors. REPOSITORY: Not stated in text.

Primary reference: M. Steiner, M. Zhu, Y. Zhao and B.-D. Erdtmann. 2005. Lower Cambrian Burgess Shale-type fossil associations of South China. Palaeogeography, Palaeoclimatology, Palaeoecology 220:129-152 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 86847: authorized by Austin Hendy, entered by Austin Hendy on 21.02.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for all groups. NOMENCLATURE: From a combination of authoritative and review publications, with modern nomenclature and species-resolution identifications.
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Lingulata
 Lingulida - Botsfordiidae
Diandongia pista
Diandongia pista Rong 1974
 Bradoriida -
Kunmingella doubillei
 Radiodonta - Amplectobeluidae
Amplectobelua trispinata
Deuteropoda
 Isoxyida - Isoxyidae
Isoxys auritus
Isoxys auritus Jiang 1982
Crustacea
 Waptiida - Waptiidae
Chuandianella ovata
Trilobita
 Redlichiida - Redlichiidae
Wutingaspis tingi, "Eoredlichia intermedia" = Eoredlichia intermediata
Wutingaspis tingi Kobayashi 1944 trilobite
"Eoredlichia intermedia" = Eoredlichia intermediata Lu 1940 trilobite
Fuxianospira
  -
Fuxianospira gyrata