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: Glenwood Formation, Blackriveran (457.3 - 449.6 Ma)
• formation-level stratigraphic resolution
Environment/lithology:
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on a review of the Sardeson Collection at the University of Minnesota, Weiss (1953), Ulrich and Scofield (1895), the unpublished work of Levorson and Gerk, and the list in Stauffer and Thiel (1941)."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 23613: authorized by Steven Holland, entered by Tori Hanson on 17.07.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Gastropoda | |
"Trochonema rugosum" = Trochonema rugosa, Trochonema vagrans, Trochonema beachi, Trochonema beloitense, "Trochonema unbilicatum" = Trochonema umbilicata
"Trochonema rugosum" = Trochonema rugosa Ulrich and Scofield 1897 snail
Trochonema vagrans Ulrich and Scofield 1897 snail
Trochonema beachi Whitfield 1878 snail
Trochonema beloitense Whitfield 1878 snail
"Trochonema unbilicatum" = Trochonema umbilicata Hall 1847 snail | |
"Gyronema duplicatum" = Gyronema semicarinatum, "Trochonema lirata" = Gyronema pulchellum, "Eotomaria prisca" = Ectomaria prisca, "Ectomaria prisca" = Ectomaria prisca
"Gyronema duplicatum" = Gyronema semicarinatum Salter 1859 snail
"Trochonema lirata" = Gyronema pulchellum Ulrich and Scofield 1897 snail
"Eotomaria prisca" = Ectomaria prisca Billings 1859 snail
"Ectomaria prisca" = Ectomaria prisca Billings 1859 snail | |
Eotomaria vicina, Eotomaria dryope, "Clathrospira subconicus" = Clathrospira subconica, Liospira angustata, Liospira obtusa, "Eotomaria supracingulata" = Paraliospira supracingulata, "Liospira abrupta" = Paraliospira abrupta
Eotomaria vicina Ulrich and Scofield 1897 snail
Eotomaria dryope Billings 1865 snail
"Clathrospira subconicus" = Clathrospira subconica Hall 1847 snail
Liospira angustata Ulrich and Scofield 1897 snail
Liospira obtusa Ulrich and Scofield 1897 snail
"Eotomaria supracingulata" = Paraliospira supracingulata Billings 1857 snail
"Liospira abrupta" = Paraliospira abrupta Ulrich and Scofield 1897 snail | |
"Clathrospira convexa" = Cataschisma convexum
"Clathrospira convexa" = Cataschisma convexum Ulrich and Scofield 1897 snail | |
Hormotoma gracilis, "Hormotoma angustata" = Hormotoma gracilis angustatus
Hormotoma gracilis Hall 1847 snail
"Hormotoma angustata" = Hormotoma gracilis angustatus Hall 1847 snail | |
Subulites regularis, Subulites conradi, "Subulites dixonensis" = Subulites dixonenesis, Fusispira spicula
Subulites regularis Ulrich and Scofield 1897 snail
Subulites conradi Ulrich and Scofield 1897 snail
"Subulites dixonensis" = Subulites dixonenesis Ulrich and Scofield 1897 snail
Fusispira spicula Sardeson 1892 snail | |
"Trochonema percarinatum" = Cyclonema percarinata
"Trochonema percarinatum" = Cyclonema percarinata Hall 1847 snail | |
Bivalvia | |
Cyrtodonta sp. Billings 1858 clam | |
Ambonychiopsis sp. Isberg 1934 clam | |
Tergomya | |
"Platyceras wisconsinense" = Helcionopsis wisconsinensis
"Platyceras wisconsinense" = Helcionopsis wisconsinensis Ulrich and Scofield 1897 |