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: Huanggexi 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 age of the [Huanggexi Member] is early late Llandovery."
• member-level stratigraphic resolution
Environment/lithology: marine; gray, argillaceous limestone and sandy, calcareous mudstone
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 27850: authorized by Michael Foote, entered by Michael Foote on 14.01.2003
Creative Commons license: CC BY (attribution)
Taxonomic list
Anthozoa | |
Cystiphyllum sp. Lonsdale 1839 horn coral | |
Rhabdocyclus cf. uniformis horn coral | |
Brachyelasma sibiricum horn coral | |
Pycnactis sp. Ryder 1926 horn coral | |
Orthophyllum cf. hupehensis horn coral | |
"Palaeofavosites sp." = Paleofavosites, Favosites sp.
"Palaeofavosites sp." = Paleofavosites Twenhofel 1914 tabulate coral
Favosites sp. Lamarck 1816 tabulate coral | |
Propora sp. Milne-Edwards and Haime 1849 tabulate coral | |
Heliolites sp. Dana 1846 tabulate coral | |
Catenipora sp. Lamarck 1816 tabulate coral
Halysites sp. von Waldheim 1813 tabulate coral | |
Trilobita | |
Encrinuroides sp. Reed 1931 trilobite | |
Songkania hanjiadianensis trilobite | |
Rhynchonellata | |
Zygospiraella sp. Nikiforova 1961 | |
Pentameridae indet. M'Coy 1844 | |
Dalmanellidae indet. Schuchert 1913 | |
Gastropoda | |
Loxonema sp. Phillips 1841 snail | |
Discordichilus globrous Xi and Yu 1990 snail corrected from "Discordochilus" [entered as Discordichilus glabrous]
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