Where: Jilin, China (44.0° N, 127.0° E: paleocoordinates 35.5° N, 50.6° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Zhangjiatun Formation, Ludlow (427.4 - 423.0 Ma)

• "We consider the age of the fauna as most likely Ludlovian. It occurs below the Erdaogou Fm. that contains the notanopliid Septoparmells in its upper part. Notanopliids are unknown elsewhere beneath the einnian. [Inference also supported by presence of Protathyrisina in lower part of Erdaogou]. However, the bulk of the fauna consists of genera that could range throughout the Ludlovian-Gedinnian time interval."

• formation-level stratigraphic resolution

Environment/lithology: marine; sandstone and mudstone

Primary reference: Y. Wang, A. J. Boucot, J.Y. Rong and X.C. Yang. 1987. Community paleoecology as a geologic tool: the Chinese Ashgillian-Eifelian (latest Ordovician through early Middle Devonian) as an example. Geological Society of America Special Paper 211:1-100 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 25849: authorized by Michael Foote, entered by Michael Foote on 26.09.2002

Creative Commons license: CC BY (attribution)