Unit 29, 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: deep subtidal shelf; lithified shale and lime 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 4720: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 18.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Trilobita
 Asaphida - Asaphidae
Megalaspides sp. Brögger 1886 trilobite
Pseudobasilicus sp. Reed 1930 trilobite
 Asaphida - Hungaiidae
Hungioides sp. Kobayashi 1936 trilobite
Strophomenata
 Billingsellida - Polytoechiidae
Tritoechia sp. Ulrich and Cooper 1936
 Strophomenida - Taffiidae
Leptella sp. Hall and Clarke 1892
Rhynchonellata
 Pentamerida - Tetralobulidae
 Pentamerida - Clarkellidae
Yangtzeella sp. Kolarova 1925
 Orthida - Paurorthidae
 Orthida - Orthidae
"Sinorthis sp." = Sinorthis, "Yichangorthis sp." = Sinorthis
"Sinorthis sp." = Sinorthis
"Yichangorthis sp." = Sinorthis
 Orthida - Euorthisinidae
 Orthida - Plectorthidae
Mimella sp. Cooper 1930
Conodonta
 Conodontophorida -
 Prioniodontida - Balognathidae
  - Strachanognathidae
Cornuodus sp. conodont
Scolopodus sp. conodont
 Protopanderodontida -
Drepanoistodus sp. Lindstrom 1971 conodont
  -
Nasusgnathus sp. Ni 1983 conodont
 Paraconodontida -
Westergaardodina sp. Müller 1959 conodont
Graptolithina
 Graptoloida -
Azygograptus sp. Nicholson and Lapworth 1875 graptoloid
 Panreclinata - Dichograptidae
Didymograptus sp. McCoy 1851 graptoloid
 Dendroidea - Dendrograptidae
Dictyonema sp. Hall 1851 graptolite