Where: Illinois, Iowa (42.0° N, 90.5° W: paleocoordinates 21.3° S, 63.6° W)
• coordinate estimated from map
• basin-level geographic resolution
When: Mifflin Formation, Blackriveran (457.3 - 449.6 Ma)
• formation-level stratigraphic resolution
Environment/lithology: argillaceous limestone
Size class: macrofossils
Collection methods: "[B]ased on a review of the Sardeson Collection at the University of Minnesota, Weiss (1953), Ulrich and Scofield (1895), the unpublished work of Levorson and Gerk, and the list in Stauffer and Thiel (1941)."
Primary reference: R. E. Sloan and G. F. Webers. 1987. Stratigraphic ranges of Middle and Late Ordovician Gastropoda and Monoplacophora of Minnesota. In R. E. Sloan (ed.), Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 183-186 [S. Holland/T. Hanson/S. Bruning]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 23615: authorized by Steven Holland, entered by Tori Hanson on 17.07.2002, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Deceptrix sp. Fuchs 1919 clam | |
Whiteavesia sp., "Endodesma sp." = Cymatonota
Whiteavesia sp. Ulrich 1893 clam
"Endodesma sp." = Cymatonota Ulrich 1893 clam | |
Sphenolium sp. Miller 1889 clam | |
Ambonychiopsis sp. Isberg 1934 clam
Cleionychia sp. Ulrich 1892 clam | |
Cyrtodonta sp. Billings 1858 clam
Vanuxemia sp. Billings 1858 clam
Cyrtodontula sp. Tomlin 1931 clam | |
Eurymya plana clam | |
Tergomya | |
"Triblydium excertum" = Tryblidium exserta, "Platyceras wisconsinense" = Helcionopsis wisconsinensis
"Platyceras wisconsinense" = Helcionopsis wisconsinensis Ulrich and Scofield 1897 | |
Gastropoda | |
"Ecculiomphalus undulatus" = Lytospira undulatus
"Ecculiomphalus undulatus" = Lytospira undulatus Hall 1861 snail | |
"Trochonema percarinatum" = Cyclonema percarinata
"Trochonema percarinatum" = Cyclonema percarinata Hall 1847 snail | |
"Ecculiomphalus beloitensis" = Lesueurilla beloitensis
"Ecculiomphalus beloitensis" = Lesueurilla beloitensis Ulrich and Scofield 1897 snail | |
Holopea rotunda Ulrich and Scofield 1897 snail
Holopea ampla Ulrich and Scofield 1897 snail
Holopea insignis Ulrich and Scofield 1897 snail
Holopea concinnula Ulrich and Scofield 1897 snail | |
Ophiletina sublaxa Ulrich and Scofield 1897 snail
Helicotoma planulata Salter 1859 snail | |
Maclurites depressus Ulrich and Scofield 1897 snail
Maclurites nitidus Ulrich and Scofield 1897 snail
"Maclurites bigsbyi" = Maclurina bigsbyi Hall 1861 snail | |
Hormotoma gracilis, "Hormotoma angustata" = Hormotoma gracilis angustatus
Hormotoma gracilis Hall 1847 snail
"Hormotoma angustata" = Hormotoma gracilis angustatus Hall 1847 snail | |
Subulites regularis, "Subulites dixonensis" = Subulites dixonenesis, Subulites conradi, Fusispira spicula
Subulites regularis Ulrich and Scofield 1897 snail
"Subulites dixonensis" = Subulites dixonenesis Ulrich and Scofield 1897 snail
Subulites conradi Ulrich and Scofield 1897 snail
Fusispira spicula Sardeson 1892 snail | |
Trochonema beloitense, Trochonema beachi, "Trochonema unbilicatum" = Trochonema umbilicata, Trochonema vagrans, "Trochonema rugosum" = Trochonema rugosa
Trochonema beloitense Whitfield 1878 snail
Trochonema beachi Whitfield 1878 snail
"Trochonema unbilicatum" = Trochonema umbilicata Hall 1847 snail
Trochonema vagrans Ulrich and Scofield 1897 snail
"Trochonema rugosum" = Trochonema rugosa Ulrich and Scofield 1897 snail | |
"Lophospira helicteres" = Eunema helicteres, Eunema centralis, "Gyronema duplicatum" = Gyronema semicarinatum, "Trochonema lirata" = Gyronema pulchellum, "Lophospira conradana" = Lophospira ventricosa, Lophospira perangulata, Lophospira serrulata, Lophospira decursa, "Eotomaria prisca" = Ectomaria prisca, "Ectomaria prisca" = Ectomaria prisca
"Lophospira helicteres" = Eunema helicteres Salter 1859 snail
Eunema centralis Ulrich and Scofield 1897 snail
"Gyronema duplicatum" = Gyronema semicarinatum Salter 1859 snail
"Trochonema lirata" = Gyronema pulchellum Ulrich and Scofield 1897 snail
"Lophospira conradana" = Lophospira ventricosa Hall 1847 snail
Lophospira perangulata Hall 1847 snail
Lophospira serrulata Salter 1859 snail
Lophospira decursa Ulrich and Scofield 1897 snail
"Eotomaria prisca" = Ectomaria prisca Billings 1859 snail
"Ectomaria prisca" = Ectomaria prisca Billings 1859 snail | |
Eotomaria dryope, Eotomaria vicina, Clathrospira subconica, "Eotomaria supracingulata" = Paraliospira supracingulata, "Liospira abrupta" = Paraliospira abrupta, Liospira obtusa, Liospira angustata
Eotomaria dryope Billings 1865 snail
Eotomaria vicina Ulrich and Scofield 1897 snail
Clathrospira subconica Hall 1847 snail
"Eotomaria supracingulata" = Paraliospira supracingulata Billings 1857 snail
"Liospira abrupta" = Paraliospira abrupta Ulrich and Scofield 1897 snail
Liospira obtusa Ulrich and Scofield 1897 snail
Liospira angustata Ulrich and Scofield 1897 snail | |
"Clathrospira convexa" = Cataschisma convexum
"Clathrospira convexa" = Cataschisma convexum Ulrich and Scofield 1897 snail | |
"Bucania emmonsi" = Loxobucania emmonsi, "Bucania minnesotensis" = Loxobucania minnesotensis, Bucania halli, Bucania sublata, Phragmolites triangularis, "Phragmolites fimbriatus" = Phragmolites fimbriata, Salpingostoma buelli
"Bucania emmonsi" = Loxobucania emmonsi Ulrich and Scofield 1897 snail
"Bucania minnesotensis" = Loxobucania minnesotensis Ulrich and Scofield 1897 snail
Bucania halli Ulrich and Scofield 1897 snail
Bucania sublata Ulrich and Scofield 1897 snail
Phragmolites triangularis Ulrich and Scofield 1897 snail
"Phragmolites fimbriatus" = Phragmolites fimbriata Ulrich and Scofield 1897 snail
Salpingostoma buelli Whitfield 1878 snail | |
"Tropidodiscus subacutus" = Alaskadiscus subacutus
"Tropidodiscus subacutus" = Alaskadiscus subacutus Ulrich and Scofield 1897 snail | |
Pterotheca attenuata Hall 1861 snail | |
Sinuites rectangularis Ulrich and Scofield 1897 snail | |
Tetranota sexcarinata Ulrich and Scofield 1897 snail
Tetranota macra Ulrich and Scofield 1897 snail
Tetranota wisconsinensis Whitfield 1878 snail
Tetranota obsoleta Ulrich and Scofield 1897 snail |