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

Also known as Chengjiang biota

Where: Yunnan, China (24.8° N, 102.4° E: paleocoordinates 35.2° N, 161.3° 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 86846: authorized by Austin Hendy, entered by Austin Hendy on 21.02.2009, edited by Uta Merkel

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.
 Bradoriida -
 Redlichiida - Yunnanocephalidae
Yunnanocephalus yunnanensis1 Mansuy 1912 trilobite
 Redlichiida - Redlichiidae
Wutingaspis tingi Kobayashi 1944 trilobite
Wutingaspis anningensis n. sp.2 Luo 1981 trilobite
Wutingaspis planifrons n. sp.2 Luo 1981 trilobite
Kuanyangia pustulosa1 Lu 1941 trilobite
"Eoredlichia intermedia" = Eoredlichia intermediata1 Lu 1940 trilobite
Retifacies abnormalis1 Hou et al. 1989
 Nektaspidida -
Xandarella spectaculum1 Hou et al. 1991
Cindarella eucalla1 Chen et al. 1996
 Nektaspidida - Naraoiidae
"Naraoia longicaudata" = Misszhouia longicaudata, Naraoia spinosa1
"Naraoia longicaudata" = Misszhouia longicaudata Zhang and Hou 1985
Naraoia spinosa1 Zhang and Hou 1985
 Mollisoniida -
Urokodia aequalis Hou et al. 1989
 Fuxianhuiida - Fuxianhuiidae
 Waptiida - Waptiidae
 Hymenostraca -
 Leanchoiliida - Leanchoiliidae
 Isoxyida - Isoxyidae
Isoxys paradoxus1 Hou 1987
Isoxys auritus1 Jiang 1982
Cardiodictyon catenulum1 Hou et al. 1991
Microdictyon sinicum1 Chen et al. 1989
Palaeopriapulites parvus Hou et al. 1999
Sicyophorus rara1 Luo and Hu 1999
 Cricocosmida - Palaeoscolecidae
"Palaeoscolex sinensis" = Mafangscolex sinensis1
"Palaeoscolex sinensis" = Mafangscolex sinensis1 Hou and Sun 1988
 Palaeoscolecidomorpha -
Maotianshania cylindrica1 Sun and Huo 1987
  - Mickwitziidae
Heliomedusa orienta Sun and Hou 1987
 Lingulida - Botsfordiidae
Diandongia pista Rong 1974
  - Vetulicolidae
 Bilateria - Eldoniidae
"Stellostomites eumorhus" = Eldonia
"Stellostomites eumorhus" = Eldonia
 Protomonaxonida - Halichondritidae
Halichondrites sp.1 Walcott 1920 demosponge
 Protomonaxonida - Leptomitidae
Paraleptomitella dictyodroma1 Chen et al. 1989 demosponge
Leptomitella confusa1 Chen et al. 1989 demosponge
 Reticulosa - Protospongiidae
Saetaspongia densa1 Mehl and Reitner 1993 glass sponge
 Chancelloriida - Chancelloriidae
Chancelloria eros1 Walcott 1920
Sinocylindra yunnanensis
Sinocylindra yunnanensis1 Chen and Erdtmann 1991