Dunleith Fm, Mortimer Member Gastropoda and Monoplacophora, Illinois and Iowa (Ordovician of the United States)
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: Mortimer Member (Dunleith Formation), Shermanian (457.3 - 449.6 Ma)
• member-level stratigraphic resolution
Environment/lithology: limestone
• Environmental call by T. Hanson.
• Limestone, sometimes dolomitic. Lithology from C. O. Leverson, A. J. Gerk, R. E. Sloan, & L. A. Bisagno. General section of the Middle and Late Ordovician strata of Northeastern Iowa, Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35, p.25-39. Edited by R. E. Sloan.
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on a review of the Sardeson Collection at the University of Minnesota, Weiss (1953), Ulrich and Scofield (1895), the unpublished work of Levorson and Gerk, and the list in Stauffer and Thiel (1941)."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 23659: authorized by Steven Holland, entered by Tori Hanson on 18.07.2002, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
| Bivalvia | |
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Similodonta sp. Soot-Ryen 1964 clam | |
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Ctenodonta sp. Salter 1852 clam | |
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Nuculites sp. Conrad 1841 clam | |
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Sphenolium sp. Miller 1889 clam | |
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Rhytimya sp. Ulrich 1893 clam | |
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Cuneamya sp. Hall and Whitfield 1875 clam | |
Modiolopsis sp., Orthodesma sp., Modiolodon sp., Prolobella sp., "Endodesma sp." = Cymatonota, Saffordia sp.
Modiolopsis sp. Hall 1847 clam
Orthodesma sp. Hall and Whitfield 1875 clam
Modiolodon sp. Ulrich 1894 clam
Prolobella sp. Ulrich 1894 clam
"Endodesma sp." = Cymatonota Ulrich 1893 clam
Saffordia sp. Ulrich 1894 clam | |
|
Plethocardia sp. clam | |
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Lyrodesma sp. Conrad 1841 clam | |
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Cleionychia sp. Ulrich 1892 clam
Ambonychiopsis sp. Isberg 1934 clam | |
|
Matheria sp. Billings 1858 clam
Cyrtodonta sp. Billings 1858 clam
Cyrtodontula sp. Tomlin 1931 clam
Vanuxemia sp. Billings 1858 clam | |
| Tergomya | |
|
| |
|
"Cyrtolites dilatatus" = Cyrtolites dilatus Ulrich and Scofield 1897
Cyrtolites retrorsus Ulrich and Scofield 1897
Cyrtolites ornatus Conrad 1838 | |
| Gastropoda | |
Raphistomina rugata, Holopea appressa, Holopea similis, Holopea paludiniformis, Holopea excelsa, Holopea pyrene, Holopea supraplana
Raphistomina rugata Ulrich and Scofield 1897 snail
Holopea appressa Ulrich and Scofield 1897 snail
Holopea similis Ulrich and Scofield 1897 snail
Holopea excelsa Ulrich and Scofield 1897 snail
Holopea pyrene Billings 1865 snail
Holopea supraplana Ulrich and Scofield 1897 snail | |
|
Ophiletina angularis Ulrich and Scofield 1897 snail | |
Raphistoma sp., "Raphistoma peracutum" = Scalites peracutum
Raphistoma sp. Hall 1847 snail
"Raphistoma peracutum" = Scalites peracutum Ulrich and Scofield 1897 snail | |
"Maclurites crassus" = Maclurites crassa
"Maclurites crassus" = Maclurites crassa Ulrich and Scofield 1897 snail | |
"Strophostylus textilis" = Cyclonema textilis
"Strophostylus textilis" = Cyclonema textilis Miller 1897 snail | |
"Cyrtolites wykoffensis" = Cyrtospira wykoffensis, Subulites sp., Subulites elongatus, Subulites pergracilis, "Hormotoma bellicincta" = Eroicaspira bellicincta, Fusispira ventricosa, "Fusispira convexis" = Fusispira convexa, Fusispira inflata, Fusispira vittata, Fusispira planulata, Fusispira intermedia, Fusispira subbrevis, Fusispira subfusiformis, Fusispira nobilis, Fusispira angusta, "Fusispira subplana" = Fusispira angusta subplana
"Cyrtolites wykoffensis" = Cyrtospira wykoffensis Ulrich and Scofield 1897 snail
Subulites sp. Emmons 1842 snail
Subulites elongatus Portlock 1843 snail
Subulites pergracilis Ulrich and Scofield 1897 snail
"Hormotoma bellicincta" = Eroicaspira bellicincta Hall 1847 snail
Fusispira ventricosa Hall 1872 snail
"Fusispira convexis" = Fusispira convexa Ulrich and Scofield 1897 snail
Fusispira inflata Meek and Worthen 1870 snail
Fusispira vittata Hall 1847 snail
Fusispira planulata Ulrich and Scofield 1897 snail
Fusispira intermedia Ulrich and Scofield 1897 snail
Fusispira subbrevis Ulrich and Scofield 1897 snail
Fusispira subfusiformis Hall 1847 snail
Fusispira nobilis Ulrich and Scofield 1897 snail
Fusispira angusta Ulrich and Scofield 1897 snail
"Fusispira subplana" = Fusispira angusta subplana Ulrich and Scofield 1897 snail | |
Liospira angustata, Liospira vitruvia, Liospira americana, "Liospira progue" = Liospira progne, Clathrospira subconica, Clathrospira conica
Liospira angustata Ulrich and Scofield 1897 snail
Liospira vitruvia Billings 1865 snail
Liospira americana Billings 1860 snail
"Liospira progue" = Liospira progne Billings 1860 snail
Clathrospira subconica Hall 1847 snail
Clathrospira conica Ulrich and Scofield 1897 snail | |
"Hormotoma salteri" = Cyrtostropha salteri
"Hormotoma salteri" = Cyrtostropha salteri Ulrich and Scofield 1897 snail | |
"Lophospira angustina" = Hormotoma minnesotensis, "Michelia neglectus" = Hormotoma neglecta, Hormotoma gracilis, "Hormotoma angustata" = Hormotoma gracilis angustatus
"Lophospira angustina" = Hormotoma minnesotensis Ulrich and Scofield 1897 snail
"Michelia neglectus" = Hormotoma neglecta Ulrich and Scofield 1897 snail
Hormotoma gracilis Hall 1847 snail
"Hormotoma angustata" = Hormotoma gracilis angustatus Hall 1847 snail | |
"Hormotoma trentonensis" = Omospira trentonensis
"Hormotoma trentonensis" = Omospira trentonensis Ulrich and Scofield 1897 snail | |
Trochonema fragile, "Trochonema unbilicatum" = Trochonema umbilicata, Trochonema subcrassum, Trochonema altum, "Eunema salteri" = Globonema niota, "Eunema robbinsi" = Globonema niota
Trochonema fragile Ulrich and Scofield 1897 snail
"Trochonema unbilicatum" = Trochonema umbilicata Hall 1847 snail
Trochonema subcrassum Ulrich and Scofield 1897 snail
Trochonema altum Ulrich and Scofield 1897 snail
"Eunema salteri" = Globonema niota Hall 1861 snail
"Eunema robbinsi" = Globonema niota Hall 1861 snail | |
Ectomaria prisca, "Lophospira pulchella" = Lophospira perangulata, "Lophospira perforata" = Lophospira perangulata, Lophospira obliqua, Lophospira spironema, "Lophospira serratula" = Lophospira serrulata, "Hormotoma major" = Lophospira major, Gyronema sp., "Lophospira concinnula" = Eunema concinnula, "Lophospira fillmorensis" = Eunema concinnula, Eunema centralis, "Lophospira oweni" = Paupospira oweni, "Lophospira sumnerensis" = Paupospira sumnerensis, Paupospira burginensis, "Lophospira elevata" = Paupospira elevata
Ectomaria prisca Billings 1859 snail
"Lophospira pulchella" = Lophospira perangulata Hall 1847 snail
"Lophospira perforata" = Lophospira perangulata Hall 1847 snail
Lophospira obliqua Ulrich and Scofield 1897 snail
Lophospira spironema Ulrich and Scofield 1897 snail
"Lophospira serratula" = Lophospira serrulata Salter 1859 snail
"Hormotoma major" = Lophospira major Hall 1852 snail
Gyronema sp. Ulrich and Scofield 1897 snail
"Lophospira concinnula" = Eunema concinnula Ulrich and Scofield 1897 snail
"Lophospira fillmorensis" = Eunema concinnula Ulrich and Scofield 1897 snail
Eunema centralis Ulrich and Scofield 1897 snail
"Lophospira oweni" = Paupospira oweni Ulrich and Scofield 1897 snail
"Lophospira sumnerensis" = Paupospira sumnerensis Safford 1869 snail
Paupospira burginensis Ulrich and Scofield 1897 snail
"Lophospira elevata" = Paupospira elevata Ulrich and Scofield 1897 snail | |
"Tropidodiscus subacutus" = Alaskadiscus subacutus
"Tropidodiscus subacutus" = Alaskadiscus subacutus Ulrich and Scofield 1897 snail | |
|
Tetranota obsoleta Ulrich and Scofield 1897 snail
Tetranota sexcarinata Ulrich and Scofield 1897 snail
Tetranota bidorsata Hall 1847 snail | |
"Carinopsis acuta" = Carinaropsis minima
"Carinopsis acuta" = Carinaropsis minima Ulrich and Scofield 1897 snail | |
"Sinuites pervolutus" = Sinuites pervoluta, Sinuites cancellatus
"Sinuites pervolutus" = Sinuites pervoluta Ulrich and Scofield 1897 snail
Sinuites cancellatus Hall 1847 snail | |
"Bellerophon platystoma" = Sphenosphaera platystoma
"Bellerophon platystoma" = Sphenosphaera platystoma Meek and Worthen 1868 snail "Bellerophon" platystoma
| |
Bucania sublata, Bucania elliptica, Kokenospira costalis, Phragmolites obliquus, Phragmolites dyeri, Phragmolites compressus, "Bucania lindleyi" = Loxobucania lindsleyi, "Salpingostoma sculptile" = Salpingostoma sculptilis, Salpingostoma buelli
Bucania sublata Ulrich and Scofield 1897 snail
Bucania elliptica Ulrich and Scofield 1897 snail
Kokenospira costalis Ulrich and Scofield 1897 snail
Phragmolites obliquus Ulrich and Scofield 1897 snail
Phragmolites dyeri Hall 1872 snail
Phragmolites compressus Conrad 1838 snail
"Bucania lindleyi" = Loxobucania lindsleyi Safford 1869 snail
"Salpingostoma sculptile" = Salpingostoma sculptilis Ulrich and Scofield 1897 snail
Salpingostoma buelli Whitfield 1878 snail | |