Spirigerina Comm., mid Xiangshuyuan Fm., Juntiaba, Shiqian Co., Guizhou Prov. (Silurian of China)

Where: Guizhou, China (27.5° N, 108.3° E: paleocoordinates 7.7° N, 125.7° E)

• coordinate based on political unit

• local area-level geographic resolution

When: Xiangshuyuan Formation, Llandovery (443.4 - 433.4 Ma)

• "Rong and Yang (1981) placed this community near the Middle-Upper Llandoverian boundary." Community found in middle part of the X. Formation.

• bed-level stratigraphic resolution

Environment/lithology: marine; gray, calcareous mudstone

• "...appears to be low- to medium-diversity BA 3, intermiediate in environmental terms between toe Eospirigerina, Nalivkinia, and Zygospirella-Brachylasma Comm's of the lower Silurian."
• "Calcareous, gray mudstone occupying an intefval of about 10 m yields this fauna."

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 25846: authorized by Michael Foote, entered by Michael Foote on 26.09.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

 Spiriferida - Cyrtiidae
Striispirifer sp. Cooper and Muir-Wood 1951
Hedeina sp. Boucot 1957
 Atrypida -
Zygospiraella sp. Nikiforova 1961
 Atrypida - Atrypinidae