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: Sherwood Member (Dunleith Formation), Shermanian (457.3 - 449.6 Ma)
• member-level stratigraphic resolution
Environment/lithology: calcareous 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on a review of the Sardeson Collection at the University of Minnesota, Weiss (1953), Ulrich and Scofield (1895), the unpublished work of Levorson and Gerk, and the list in Stauffer and Thiel (1941)."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 23667: authorized by Steven Holland, entered by Tori Hanson on 18.07.2002, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
Tergomya | |
| |
Cyrtolites ornatus Conrad 1838 | |
Bivalvia | |
Nuculites sp. Conrad 1841 clam | |
Similodonta sp. Soot-Ryen 1964 clam | |
Ctenodonta sp. Salter 1852 clam | |
Ambonychiopsis sp. Isberg 1934 clam
Cleionychia sp. Ulrich 1892 clam | |
Vanuxemia sp. Billings 1858 clam
Cyrtodonta sp. Billings 1858 clam
Cyrtodontula sp. Tomlin 1931 clam
Matheria sp. Billings 1858 clam | |
Cuneamya sp. Hall and Whitfield 1875 clam | |
Modiolopsis sp. Hall 1847 clam
"Endodesma sp." = Cymatonota Ulrich 1893 clam
Modiolodon sp. Ulrich 1894 clam
Orthodesma sp. Hall and Whitfield 1875 clam
Saffordia sp. Ulrich 1894 clam | |
Plethocardia sp. clam | |
Sphenolium sp. Miller 1889 clam | |
Rhytimya sp. Ulrich 1893 clam | |
Lyrodesma sp. Conrad 1841 clam | |
Gastropoda | |
Hormotoma gracilis, "Hormotoma angustata" = Hormotoma gracilis angustatus, "Michelia neglectus" = Hormotoma neglecta, "Lophospira angustina" = Hormotoma minnesotensis
Hormotoma gracilis Hall 1847 snail
"Hormotoma angustata" = Hormotoma gracilis angustatus Hall 1847 snail
"Michelia neglectus" = Hormotoma neglecta Ulrich and Scofield 1897 snail
"Lophospira angustina" = Hormotoma minnesotensis Ulrich and Scofield 1897 snail | |
"Hormotoma salteri" = Cyrtostropha salteri
"Hormotoma salteri" = Cyrtostropha salteri Ulrich and Scofield 1897 snail | |
Liospira americana, "Liospira progue" = Liospira progne, Liospira vitruvia, Liospira angustata, Clathrospira conica, Clathrospira subconica
Liospira americana Billings 1860 snail
"Liospira progue" = Liospira progne Billings 1860 snail
Liospira vitruvia Billings 1865 snail
Liospira angustata Ulrich and Scofield 1897 snail
Clathrospira conica Ulrich and Scofield 1897 snail
Clathrospira subconica Hall 1847 snail | |
Fusispira nobilis, Fusispira angusta, "Fusispira subplana" = Fusispira angusta subplana, Fusispira subfusiformis, Fusispira ventricosa, Fusispira planulata, Fusispira intermedia, Fusispira inflata, Fusispira subbrevis, "Fusispira convexis" = Fusispira convexa, "Cyrtolites wykoffensis" = Cyrtospira wykoffensis, "Cyrtospira wykoffensis" = Cyrtospira wykoffensis, Subulites sp., Subulites pergracilis, Subulites elongatus, "Hormotoma bellicincta" = Eroicaspira bellicincta
Fusispira nobilis Ulrich and Scofield 1897 snail
Fusispira angusta Ulrich and Scofield 1897 snail
"Fusispira subplana" = Fusispira angusta subplana Ulrich and Scofield 1897 snail
Fusispira subfusiformis Hall 1847 snail
Fusispira ventricosa Hall 1872 snail
Fusispira planulata Ulrich and Scofield 1897 snail
Fusispira intermedia Ulrich and Scofield 1897 snail
Fusispira inflata Meek and Worthen 1870 snail
Fusispira subbrevis Ulrich and Scofield 1897 snail
"Fusispira convexis" = Fusispira convexa Ulrich and Scofield 1897 snail
"Cyrtolites wykoffensis" = Cyrtospira wykoffensis Ulrich and Scofield 1897 snail
"Cyrtospira wykoffensis" = Cyrtospira wykoffensis Ulrich and Scofield 1897 snail
Subulites sp. Emmons 1842 snail
Subulites pergracilis Ulrich and Scofield 1897 snail
Subulites elongatus Portlock 1843 snail
"Hormotoma bellicincta" = Eroicaspira bellicincta Hall 1847 snail | |
Trochonema subcrassum, Trochonema fragile, "Trochonema unbilicatum" = Trochonema umbilicata, Trochonema altum, "Eunema robbinsi" = Globonema niota, "Eunema salteri" = Globonema niota
Trochonema subcrassum Ulrich and Scofield 1897 snail
Trochonema fragile Ulrich and Scofield 1897 snail
"Trochonema unbilicatum" = Trochonema umbilicata Hall 1847 snail
Trochonema altum Ulrich and Scofield 1897 snail
"Eunema robbinsi" = Globonema niota Hall 1861 snail
"Eunema salteri" = Globonema niota Hall 1861 snail | |
"Lophospira fillmorensis" = Eunema concinnula, Eunema centralis, Gyronema sp., Ectomaria prisca, "Lophospira sumnerensis" = Paupospira sumnerensis, "Lophospira elevata" = Paupospira elevata, Paupospira burginensis, "Lophospira perforata" = Lophospira perangulata, Lophospira obliqua, "Hormotoma major" = Lophospira major
"Lophospira fillmorensis" = Eunema concinnula Ulrich and Scofield 1897 snail
Eunema centralis Ulrich and Scofield 1897 snail
Gyronema sp. Ulrich and Scofield 1897 snail
Ectomaria prisca Billings 1859 snail
"Lophospira sumnerensis" = Paupospira sumnerensis Safford 1869 snail
"Lophospira elevata" = Paupospira elevata Ulrich and Scofield 1897 snail
Paupospira burginensis Ulrich and Scofield 1897 snail
"Lophospira perforata" = Lophospira perangulata Hall 1847 snail
Lophospira obliqua Ulrich and Scofield 1897 snail
"Hormotoma major" = Lophospira major Hall 1852 snail | |
"Hormotoma trentonensis" = Omospira trentonensis
"Hormotoma trentonensis" = Omospira trentonensis Ulrich and Scofield 1897 snail | |
"Strophostylus textilis" = Cyclonema textilis
"Strophostylus textilis" = Cyclonema textilis Miller 1897 snail | |
"Raphistoma peracutum" = Scalites peracutum, Raphistoma sp.
"Raphistoma peracutum" = Scalites peracutum Ulrich and Scofield 1897 snail
Raphistoma sp. Hall 1847 snail | |
Raphistomina rugata, Holopea paludiniformis, Holopea supraplana, Holopea pyrene, Holopea excelsa, Holopea similis, Holopea appressa
Raphistomina rugata Ulrich and Scofield 1897 snail
Holopea supraplana Ulrich and Scofield 1897 snail
Holopea pyrene Billings 1865 snail
Holopea excelsa Ulrich and Scofield 1897 snail
Holopea similis Ulrich and Scofield 1897 snail
Holopea appressa Ulrich and Scofield 1897 snail | |
Ophiletina angularis Ulrich and Scofield 1897 snail | |
"Maclurites crassus" = Maclurites crassa
"Maclurites crassus" = Maclurites crassa Ulrich and Scofield 1897 snail | |
"Salpingostoma sculptile" = Salpingostoma sculptilis, Kokenospira costalis, "Bucania lindleyi" = Loxobucania lindsleyi, Bucania elliptica, Bucania sublata, Phragmolites dyeri, Phragmolites compressus
"Salpingostoma sculptile" = Salpingostoma sculptilis Ulrich and Scofield 1897 snail
Kokenospira costalis Ulrich and Scofield 1897 snail
"Bucania lindleyi" = Loxobucania lindsleyi Safford 1869 snail
Bucania elliptica Ulrich and Scofield 1897 snail
Bucania sublata Ulrich and Scofield 1897 snail
Phragmolites dyeri Hall 1872 snail
Phragmolites compressus Conrad 1838 snail | |
"Bellerophon platystoma" = Sphenosphaera platystoma, "Bellerophon clausus" = Sphenosphaera rogersensis
"Bellerophon platystoma" = Sphenosphaera platystoma Meek and Worthen 1868 snail "Bellerophon" platystoma
| |
Tetranota bidorsata Hall 1847 snail
Tetranota sexcarinata Ulrich and Scofield 1897 snail
Tetranota obsoleta Ulrich and Scofield 1897 snail | |
"Tropidodiscus subacutus" = Alaskadiscus subacutus
"Tropidodiscus subacutus" = Alaskadiscus subacutus Ulrich and Scofield 1897 snail | |
"Sinuites pervolutus" = Sinuites pervoluta
"Sinuites pervolutus" = Sinuites pervoluta Ulrich and Scofield 1897 snail |