Where: Yunnan, China (25.5° N, 103.8° E: paleocoordinates 9.1° N, 129.9° E)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Miaokao Formation, Ludlow (427.4 - 423.0 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. "Spathognathodus crispus occurs in the lower part of the Miaokao Fm. Therefore, we correlate the M. Fm. with the Late Ludlow." It's not clear from the correlation chart whether this is Ludfordian in the strict sense.
• formation-level stratigraphic resolution
Environment/lithology: marine; limestone and flat-pebble shale
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 27796: authorized by Michael Foote, entered by Michael Foote on 09.01.2003, edited by Joseph Flannery-Sutherland
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Deuteropoda | |
Ostracoda indet. Latreille 1802 ostracod | |
Trilobita | |
Warburgella sp. Reed 1931 trilobite
Proetus sp. Steininger 1831 trilobite | |
Gastropoda | |
Gastropoda indet. Cuvier 1795 snail | |
Bivalvia | |
Actinopteria cf. mansuyi oyster
Actinopteria mientienensis oyster | |
Praecardium distans clam | |
Rhynchonellata | |
Schizophoria (Eoschizophoria) hesta Rong et al. 1974 | |
Strophomenata | |
"Aesopomum delicata" = Aesopomum delicatum
"Aesopomum delicata" = Aesopomum delicatum Rong et al. 1974 | |
Stenolaemata | |
Helopora sp. Hall 1851 | |
Batostomella sp. Bassler 1911 | |
Conodonta | |
Spathognathodus crispus conodont | |
"Hindeodella sp." = Ozarkodina
"Hindeodella sp." = Ozarkodina Branson and Mehl 1933 conodont | |
Trichonodella sp. Branson and Branson 1947 conodont | |
Osteichthyes | |
Ligulalepis yunnanensis Wang and Dong 1989 lobe-finned fish
Naxilepis gracilis Wang and Dong 1989 bony fish | |
Chondrichthyes | |
Hanilepis wangi spiny fish | |
Nostolepis sp. Pander 1856 spiny fish | |
Poracanthodes qujingensis spiny fish | |
Gomphonchus sp. Gross 1971 spiny fish | |
Anthozoa | |
Squameofavosites sp. Chernyshev 1941 tabulate coral | |
Kyphophyllum sp. Wedekind 1927 horn coral |