Unit 20, Tongzhi Fm., Honghuayuan and Tongzhi, Guizhou Prov., China ( of China)

Where: Guizhou, China (28.0° N, 107.0° E: paleocoordinates 21.4° N, 143.4° E)

• local area-level geographic resolution

When: Tongzi Formation, Tremadoc (486.5 - 477.7 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: sand shoal; lithified, ooidal grainstone and shale

• oolitic limestone and muddy shale

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 5275: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 12.09.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Asaphida - Asaphidae
Psilocephalina sp.
Psilocephalina sp. Hsu 1948 trilobite
 Asaphida - Taihungshaniidae
Tungtzuella sp.
Tungtzuella sp. Lu 1957 trilobite
Rhynchonellata
 Orthida - Eoorthidae
Apheoorthis sp.
Apheoorthis sp. Ulrich and Cooper 1936
[entered as Apheorthis sp.]
 Orthida - Hesperonomiidae
Hesperonomia sp.
Hesperonomia sp. Ulrich and Cooper 1936