Also known as Mifflin Submember, Platteville Fm, SW Wisconsin, Hesperorthis-Eoleperditia
Where: Wisconsin (42.7° N, 90.5° W: paleocoordinates 20.8° S, 63.1° W)
• coordinate estimated from map
When: Mifflin Member (McGregor Formation), Caradoc (458.4 - 449.5 Ma)
• Was: McGregor Member (Platteville Formation), Mifflin Submember
• member-level stratigraphic resolution
Environment/lithology: deep subtidal; mudstone and packstone
Size class: macrofossils
Primary reference: C. W. Byers and S. Gavlin. 1979. Two contemporaneous equilibrium communities in the Ordovician of Wisconsin. Lethaia 12:297-305 [M. Patzkowsky/Z. Krug]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 55472: authorized by Mark Patzkowsky, entered by Zack Krug on 26.10.2005
Creative Commons license: CC BY (attribution)
Taxonomic list
Ostracoda | |
Eoleperditia sp. Swartz 1949 ostracod | |
Trilobita | |
Illaenus sp. Dalman 1827 trilobite
Bumastus sp. Murchison 1839 trilobite | |
Encrinurus sp. Emmrich 1844 trilobite | |
Ceraurus sp. Green 1832 trilobite | |
Gastropoda | |
Liospira sp. Ulrich and Scofield 1897 snail | |
Sinuites sp. Koken 1896 snail | |
Phragmolites sp. Conrad 1838 snail | |
Rhynchonellata | |
Rhynchotrema sp. Hall 1860 | |
Hesperorthis sp. Schuchert and Cooper 1931 | |
Dinorthis sp. Hall and Clarke 1892
Campylorthis sp. Ulrich and Copper 1942 | |
Pionodema sp. Foerste 1912 | |
Onniella sp. Bancroft 1928 | |
Strophomenata | |
Rafinesquina sp. Hall and Clarke 1892 | |
Strophomena sp. Rafinesque and De Blainville 1824
Opikina sp. Salmon 1942 |