Unit 33, Dawan Fm., Middle Mbr., Huanghuachang and Yiching, Hubei Prov., China (Ordovician of China)

Where: Hubei, China (33.0° N, 111.0° E: paleocoordinates 12.8° N, 140.9° E)

• local area-level geographic resolution

When: Middle Member (Dawan Formation), Arenig (478.6 - 466.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified, argillaceous limestone

• Muddy limestone

Primary reference: X. Wang, L. Xian, S. Ni, Q. Zheng, G. Xu, T. Zhou, C. Lai and Z. Li. 1987. Biostratigraphy of the Yangtze Gorge Area. Part (2) Early Paleozoic Era. Geological Publishing House, Beijing 43-142 [A. Miller/P. Novack-Gottshall]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 4716: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 18.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

 Asaphida - Asaphidae
Liomegalaspides sp. Lu and Chang 1974 trilobite
 Pentamerida - Clarkellidae
Yangtzeella sp. Kolarova 1925
 Orthida - Paurorthidae
 Endocerida - Endoceratidae
Vaginoceras sp. Hyatt 1884
 Endocerida -
 Actinocerida -
Sactoceras sp. Hyatt 1884
 Orthoceratoidea - Protocycloceratidae
Protocycloceras sp. Hyatt and Zittel 1900
 Conodontophorida -
Oistodus sp. conodont
Paroistodus sp. Lindström 1971 conodont
 Prioniodontida - Balognathidae
  - Strachanognathidae
Acodus sp. Pander 1856 conodont
 Protopanderodontida -
Drepanoistodus sp. Lindstrom 1971 conodont
 Protopanderodontida - Protopanderodontidae
Drepanodus sp. Pander 1856 conodont
Nasusgnathus sp. Ni 1983 conodont
 Panreclinata - Dichograptidae
Didymograptus sp. McCoy 1851 graptoloid