Unit 31, Dawan Fm., Lower 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: Lower Member (Dawan Formation), Arenig (478.6 - 466.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified lime mudstone and shale

• Nodular micrite and mudstone

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 4718: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 18.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhombifera
 Hemicosmitoida - Hemicosmitidae
Hemicosmites sp.
Hemicosmites sp. Buch 1840
Pterobranchia
 Graptoloidea - Dichograptidae
Azygograptus sp.
Azygograptus sp. Nicholson and Lapworth 1875 graptolite
 Graptoloidea - Phyllograptidae
Phyllograptus sp.
Phyllograptus sp. Hall 1858 graptolite
Conodonta
 Protopanderodontida - Drepanoistodontidae
Drepanoistodus sp., Paroistodus sp.
Drepanoistodus sp. Lindstrom 1971 conodont
Paroistodus sp. Lindström 1971 conodont
 Protopanderodontida - Protopanderodontidae
Protopanderodus sp., Scolopodus sp.
Protopanderodus sp. Lindström 1971 conodont
Scolopodus sp. conodont
 Ozarkodinida -
Periodon sp.
Periodon sp. Hadding 1913 conodont
 Prioniodontida - Balognathidae
Baltoniodus sp.
Baltoniodus sp. Lindstrom 1971 conodont
 Prioniodontida - Oistodontidae
Oistodus sp.
Oistodus sp. Pander 1856 conodont
Cephalopoda
 Ellesmerocerida - Bathmoceratidae
Bathmoceras sp.
Bathmoceras sp. Barrande 1865
Gastropoda
 Euomphalina - Ophiletidae
Ecculiomphalus sp.
Ecculiomphalus sp. Portlock 1843 snail
Rhynchonellata
 Pentamerida - Clarkellidae
Yangtzeella sp.
Yangtzeella sp. Kolarova 1925
 Orthida - Orthidae
Sinorthis sp.
 Orthida - Plectorthidae
Mimella sp.
Mimella sp. Cooper 1930
 Orthida - Paurorthidae
Nereidella sp.