Unit 29, Dawan Fm., Lower Mbr., Huanghuachang and Yiching, Hubei Prov., China: Arenig, China

List of taxa
Where & when
Taphonomy & methods
Metadata & references
Taxonomic list
Cyrtomodus sp.
Trilobita - Asaphida - Asaphidae
Megalaspides sp. Brögger 1886
Pseudobasilicus sp. Reed 1930
Trilobita - Asaphida - Hungaiidae
Hungioides sp. Kobayashi 1936
Strophomenata - Billingsellida - Polytoechiidae
Tritoechia sp. Ulrich and Cooper 1936
Strophomenata - Strophomenida - Taffiidae
Leptella sp. Hall and Clarke 1892
Rhynchonellata - Pentamerida - Tetralobulidae
Pseudoporambonites sp. Zeng 1977
Rhynchonellata - Pentamerida - Clarkellidae
Yangtzeella sp. Kolarova 1925
Rhynchonellata - Orthida - Paurorthidae
Nereidella sp.
Rhynchonellata - Orthida - Orthidae
Sinorthis sp.
Yichangorthis sp.
synonym of Sinorthis
Rhynchonellata - Orthida - Euorthisinidae
Euorthisina sp.
Rhynchonellata - Orthida - Plectorthidae
Mimella sp. Cooper 1930
Conodonta - Conodontophorida
Protopanderodus sp.
Oistodus sp.
Conodonta - Balognathidae
Baltoniodus sp.
Conodonta - Strachanognathidae
Cornuodus sp.
Scolopodus sp.
Conodonta - Protopanderodontida
Drepanoistodus sp. Lindstrom 1971
Nasusgnathus sp. Ni 1983
Conodonta - Paraconodontida
Westergaardodina sp. Müller 1959
Azygograptus sp. Nicholson and Lapworth 1875
Pterobranchia - Dichograptidae
Didymograptus sp. McCoy 1851
Pterobranchia - Dendroidea - Dendrograptidae
Dictyonema sp. Hall 1851
see common names

Country:China State/province:Hubei
Coordinates: 33.0° North, 111.0° East (view map)
Paleocoordinates:12.8° North, 140.9° East
Geographic resolution:local area
10 m.y. bin:Ordovician 2
*Period:Early/Lower Ordovician *Epoch:Early/Lower Arenig
Key time interval:Arenig
Age range of interval:478.60000 - 466.00000 m.y. ago
* legacy (obsolete) database fields
Formation:Dawan Member:Lower
Local section:29
Stratigraphic resolution:group of beds
Lithology and environment
Primary lithology: lithified "shale"
Secondary lithology: lime mudstone
Environment:deep subtidal shelf
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Database number:4720
Authorizer:A. Miller Enterer:P. Novack-Gottshall
Research group:marine invertebrate
Created:1999-08-18 07:40:01 Last modified:1999-08-18 10:40:01
Access level:the public Released:2000-11-20 13:53:23
Creative Commons license:CC BY
Reference information

Primary reference:

287. 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]