Unit 23, Zhitai Fm., Yanheganxi and Yanhe, Guizhou Prov., China (Ordovician of China)

Where: Guizhou, China (29.0° N, 109.0° E: paleocoordinates 16.5° N, 138.4° E)

• local area-level geographic resolution

When: Zhitai Formation, Arenig (478.6 - 466.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified, green, yellow shale

• Yellowish green mica shale with sandbelts at the bottom

Primary reference: R. Wang. 1981. Stratigraphic Summary of the Southwestern Region of China. Institute of Geology and Mine Deposit at Chengdu, Ministry of Geology (not published, copy of article deposited with A. I. Miller at the University of Cincinnati, received through S. Mao) 14-61 [A. Miller/P. Novack-Gottshall]more details

PaleoDB collection 4757: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 19.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Asaphida - Remopleurididae
Remopleurides sp.
Remopleurides sp. Portlock 1843 trilobite
 Asaphida - Asaphidae
Megalaspides sp.
Megalaspides sp. Brögger 1886 trilobite
 Phacopida - Calymenidae
Neseuretus sp.
Neseuretus sp. Hicks 1873 trilobite
 Phacopida - Pliomeridae
Encrinurella sp.
Encrinurella sp. Reed 1915 trilobite
Strophomenata
 Billingsellida - Polytoechiidae
Polytoechia sp., Martellia sp.
Martellia sp. Wirth 1936
Rhynchonellata
 Orthida - Glyptorthidae
Lepidorthis sp.
 Orthida - Archaeorthidae
Nothorthis sp.
Nothorthis sp. Ulrich and Cooper 1938
 Orthida - Finkelnburgiidae
Diparelasma sp.
Diparelasma sp. Ulrich and Cooper 1936
 Orthida - Plectorthidae
Mimella sp.
Mimella sp. Cooper 1930
 Pentamerida - Clarkellidae
Yangtzeella sp.
Yangtzeella sp. Kolarova 1925
Pterobranchia
 Graptoloidea - Retiolitidae
Glyptograptus sp.
 Graptoloidea - Dichograptidae
Didymograptus sp.
Didymograptus sp. McCoy 1851 graptolite