Where: Yunnan, China (27.7° N, 103.9° E: paleocoordinates 10.2° N, 128.6° E)
• coordinate based on political unit
• local area-level geographic resolution
When: Sifengya Member (Takuan Formation), Telychian (438.5 - 433.4 Ma)
• Except where otherwise stated, ref. 7624 uses Lower Silurian as equivalent to Llandovery, Middle Silurian as equivalent to Wenlock, and Upper Silurian as equivalent to Ludlow plus Pridoli. Revised usage of Takuan Formation to restrict it so Songkan, Huanggexi, and Sifengya units (from bottom to top). Daluzhai is regarded as synonym of Xiushan Formation. "The fauna [of the Sifengya Member] is of Upper Llandovery age."
• member-level stratigraphic resolution
Environment/lithology: marine; calcareous shale and argillaceous limestone
Primary reference: E.-z. Mu, A. J. Boucot, X. Chen and J.-y. Rong. 1986. Correlation of the Silurian rocks of China. In A. J. Boucot and W. B. N. Berry (eds.), Geological Society of America Special Paper 202:1-80 [M. Foote/M. Foote/P. Wagner]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 27851: authorized by Michael Foote, entered by Michael Foote on 14.01.2003
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Trilobita | |
Encrinuroides sp. Reed 1931 trilobite | |
Gastropoda | |
Raphistomina rhombistoma snail | |
Catazone changningensis Xi and Yu 1990 snail | |
Bivalvia | |
Actinopteria sp. Hall 1884 oyster | |
Rhynchonellata | |
Striispirifer sp. Cooper and Muir-Wood 1951 | |
Strophomenata | |
"Leptostrophia" sp. Hall and Clarke 1892 | |
Stenolaemata | |
Fenestellidae indet. King 1850 | |
Anthozoa | |
"Palaeofavosites sp." = Paleofavosites Twenhofel 1914 tabulate coral
Favosites sp. Lamarck 1816 tabulate coral
Mesofavosites sp. Sokolov 1951 tabulate coral | |
Multisolenia sp. Fritz 1937 tabulate coral | |
Parastriatopora sp. Sokolov 1949 tabulate coral | |
Alveolites sp. Lamarck 1801 tabulate coral | |
Halysites sp. von Waldheim 1813 tabulate coral | |
Aphyllum sp. Soshkina 1937 horn coral | |
Microplasma sp. Dybowski 1873 horn coral | |
Ketophyllum intermedium horn coral | |
Pseudophaulactis sp. Zaprudskaya 1963 horn coral | |
Brachyelasma sp. Lang et al. 1940 horn coral
Crassilasma daguanensis horn coral
Borelasma roboriseptatum horn coral | |
Pycnostylus longiseptatus horn coral | |
Ceriaster minor horn coral
Ceriaster sp. Lindström 1883 horn coral | |
Entelophyllum sp. Wedekind 1927 horn coral | |
Tabularia sp. Soshkina 1937 horn coral | |
Strombodes cf. socialis horn coral
Strombodes yanjinense horn coral | |
Codonophyllum | |
Codonophyllum sp. Wedekind 1927 |