Zygospiraella-Brachyelasma Comm., Llandovery, Leijiatun, Shiqian Co., NE Guizhou (Silurian of China)

Where: Guizhou, China (27.5° N, 108.2° E: paleocoordinates 7.8° N, 125.8° E)

• coordinate based on political unit

• basin-level geographic resolution

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

• The lowest bed of the formation, about 2 m thick. Beds overlie Lungmachi Formation, with graptolitic fauna, and are overlain by coral-brachiopod-rich sequence of Xiangshuyuan Formation.

• bed-level stratigraphic resolution

Environment/lithology: marine; limestone and calcareous mudstone

• "most brachiopods articulated...presence of medium-diversity, articulated brach. fauna with both rugose corals and a stromatoporoid is consistent with BA 3, moderately quiet water, as is the stratigraphic position..."
• "occurs in well-bedded limestone and calcareous mudstone, composing an interval up to 8 m thick"

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 25869: authorized by Michael Foote, entered by Michael Foote on 26.09.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Atrypida -
Zygospiraella sp.
Zygospiraella sp. Nikiforova 1961
 Atrypida - Atrypinidae
Beitaia sp., "Kritorhynchia sp." = Athyrisinoides, Nalivkinia sp.
Beitaia sp. Rong et al. 1974
"Kritorhynchia sp." = Athyrisinoides Jiang 1978
 Spiriferida - Cyrtiidae
Eospirifer sp.
Eospirifer sp. Schuchert 1913
Stromatoporoidea
 Stromatoporoidea -
Stromatoporoidea indet.
Stromatoporoidea indet. stromatoporoid sponge
single genus
Anthozoa
 Rugosa -
Rugosa indet.
Rugosa indet. horn coral
four genera
 Stauriida - Streptelasmatidae
Brachyelasma sp.
Brachyelasma sp. Lang et al. 1940 horn coral