Dunleith Fm, Eagle Point 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: Eagle Point Member (Dunleith Formation), Shermanian (457.3 - 449.6 Ma)
• member-level stratigraphic resolution
Environment/lithology: dolomitic limestone
• Environmental call by T. Hanson.
• Slightly dolomitic limestone. 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on a review of the Sardeson Collection at the University of Minnesota, Weiss (1953), Ulrich and Scofield (1895), the unpublished work of Levorson and Gerk, and the list in Stauffer and Thiel (1941)."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 23653: 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
| unclassified | |
| Bivalvia | |
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Palaeoneilo sp. Hall and Whitfield 1869 clam | |
|
Ctenodonta sp. Salter 1852 clam
Tancrediopsis sp. Beushausen 1895 clam | |
|
Similodonta sp. Soot-Ryen 1964 clam | |
|
Plethocardia sp. clam | |
|
Modiolodon sp. Ulrich 1894 clam
Orthodesma sp. Hall and Whitfield 1875 clam
Modiolopsis sp. Hall 1847 clam
Aristerella sp. Ulrich 1894 clam | |
|
Lyrodesma sp. Conrad 1841 clam | |
|
Vanuxemia sp. Billings 1858 clam
Cyrtodonta sp. Billings 1858 clam
Cyrtodontula sp. Tomlin 1931 clam | |
| Gastropoda | |
"Raphistoma peracutum" = Scalites peracutum
"Raphistoma peracutum" = Scalites peracutum Ulrich and Scofield 1897 snail | |
"Strophostylus textilis" = Cyclonema textilis, Cyclonema varicosum
"Strophostylus textilis" = Cyclonema textilis Miller 1897 snail
Cyclonema varicosum Hall 1861 snail | |
Trochonema retrorsum, "Trochonema unbilicatum" = Trochonema umbilicata
Trochonema retrorsum Ulrich and Scofield 1897 snail
"Trochonema unbilicatum" = Trochonema umbilicata Hall 1847 snail | |
"Lophospira oweni" = Paupospira oweni, "Lophospira serratula" = Lophospira serrulata, "Lophospira pulchella" = Lophospira perangulata, Lophospira spironema, "Lophospira concinnula" = Eunema concinnula, Eunema centralis, Gyronema pulchellum, Gyronema semicarinatum
"Lophospira oweni" = Paupospira oweni Ulrich and Scofield 1897 snail
"Lophospira serratula" = Lophospira serrulata Salter 1859 snail
"Lophospira pulchella" = Lophospira perangulata Hall 1847 snail
Lophospira spironema Ulrich and Scofield 1897 snail
"Lophospira concinnula" = Eunema concinnula Ulrich and Scofield 1897 snail
Eunema centralis Ulrich and Scofield 1897 snail
Gyronema pulchellum Ulrich and Scofield 1897 snail
Gyronema semicarinatum Salter 1859 snail | |
|
Fusispira spicula Sardeson 1892 snail
Fusispira subfusiformis Hall 1847 snail
Subulites sp. Emmons 1842 snail | |
Liospira angustata, Liospira americana, Liospira vitruvia, Liospira modesta, "Eotomaria supracingulata" = Paraliospira supracingulata, "Liospira abrupta" = Paraliospira abrupta, "Clathrospira conica" = Clathrospira conica, "Eunema clivosa" = Clathrospira conica, Clathrospira subconica
Liospira angustata Ulrich and Scofield 1897 snail
Liospira americana Billings 1860 snail
Liospira vitruvia Billings 1865 snail
Liospira modesta Ulrich and Scofield 1897 snail
"Eotomaria supracingulata" = Paraliospira supracingulata Billings 1857 snail
"Liospira abrupta" = Paraliospira abrupta Ulrich and Scofield 1897 snail
"Clathrospira conica" = Clathrospira conica Ulrich and Scofield 1897 snail
"Eunema clivosa" = Clathrospira conica Ulrich and Scofield 1897 snail
Clathrospira subconica Hall 1847 snail | |
|
Hormotoma gracilis Hall 1847 snail | |
"Sinuites pervolutus" = Sinuites pervoluta, Sinuites cancellatus
"Sinuites pervolutus" = Sinuites pervoluta Ulrich and Scofield 1897 snail
Sinuites cancellatus Hall 1847 snail | |
|
Tetranota bidorsata Hall 1847 snail
Tetranota obsoleta Ulrich and Scofield 1897 snail
Tetranota sexcarinata Ulrich and Scofield 1897 snail | |
"Carinopsis acuta" = Carinaropsis minima
"Carinopsis acuta" = Carinaropsis minima Ulrich and Scofield 1897 snail | |
|
"Bucania emmonsi" = Loxobucania emmonsi Ulrich and Scofield 1897 snail
Phragmolites obliquus Ulrich and Scofield 1897 snail
Salpingostoma buelli Whitfield 1878 snail | |
| Tergomya | |
"Triblydium (Palacmacea) humilis" = Floripatella humilis
"Triblydium (Palacmacea) humilis" = Floripatella humilis Ulrich and Scofield 1897 "Triblydium" (Palacmacea) humilis
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"Platyceras depressum" = Helcionopsis depressum
"Platyceras depressum" = Helcionopsis depressum Ulrich and Scofield 1897 | |
"Cyrtolites dilatatus" = Cyrtolites dilatus, Cyrtolites retrorsus
"Cyrtolites dilatatus" = Cyrtolites dilatus Ulrich and Scofield 1897
Cyrtolites retrorsus Ulrich and Scofield 1897 | |