Bed L4 of the Upper Qiziqiao Fm, Xikuangshan section, Xinhua County, Hunan (Devonian of China)

Where: Hunan, China (27.8° N, 111.5° E: paleocoordinates 4.3° S, 109.3° E)

• coordinate based on political unit

• small collection-level geographic resolution

When: Qiziqiao Formation, Frasnian (382.7 - 372.2 Ma)

• Bed is about 1.25m thick.

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; shale and shelly/skeletal limestone

• outer littoral to shallow subtidal zone.
• interbedded bioclastic limestone and shale

Collection methods: Illustrated specimens are housed in the Department of Geology, Peking University in Beijing (abbreviated PUM).

Primary reference: X.-P. Ma, Y.-L. Sun, W.-C. Hao and W.-H. Liao. 2002. Rugose corals and brachiopods across the Frasnian-Famennian boundary in central Hunan, South China. Acta Palaeontologica Polonica 47(2):373-396 [A. Miller/J. Sessa/J. Sessa]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 40953: authorized by Arnold Miller, entered by Jocelyn Sessa on 04.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Brachiopods, corals, and conodonts are listed as present, ostracod abundance is listed as the number of left and right valves per 500 grams of sample. Ostracod abundance is grouped into categories of < 20, 20-5, 50-100, 100-200, >400.
Beyrichiopsacea sp.
50-100 specimens
Perimarginia sp.
Perimarginia sp. 1, < 20 specimens
Perimarginia ovata
20-50 specimens
 Podocopida - Bythocytheridae
Monoceratina sp. Roth 1928 ostracod
< 20 specimens
 Podocopida - Acratiidae
Acratia sp. Delo 1930 ostracod
20-50 specimens
 Podocopida - Bairdiidae
"Cryptobairdia sp." = Bairdia (Cryptobairdia) Sohn 1960 ostracod
> 400 specimens
 Podocopida -
Bairdiocypris lepidus ostracod
< 20 specimens
Bairdiocypris sp. ostracod
200-400 specimens
 Palaeocopida - Aechminellidae
Evlanovia sp. Egorov 1950 ostracod
20-50 specimens
 Palaeocopida - Primitiidae
Primitia sp. Jones and Holl 1923 ostracod
Primitia sp. 3, < 20 specimens
 Platycopida - Paraparchitidae
? Chamishaella fabuloides ostracod
50-100 specimens
Paraparchites sp. Ulrich and Bassler 1906 ostracod
100-200 specimens
 Platycopida - Cavellinidae
Cavellina placida ostracod
200-400 specimens
 Spiriferida - Cyrtospiriferidae