Ion Formation, Buckhorn 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: Buckhorn Member (Ion Formation), Kirkfieldian (457.3 - 449.6 Ma)
• member-level stratigraphic resolution
Environment/lithology: limestone
• Environmental call by T. Hanson.
• Lithology from F. M. Swain. 1987. Middle and Upper Ordovician Ostracoda of Minnesota and Iowa. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 : 99-101. 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on a review of the Sardeson Collection at the University of Minnesota, Weiss (1953), Ulrich and Scofield (1895), the unpublished work of Levorson and Gerk, and the list in Stauffer and Thiel (1941)."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 23623: authorized by Steven Holland, entered by Tori Hanson on 17.07.2002, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
| unclassified | |
| Tergomya | |
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| |
"Cyrtolites dilatatus" = Cyrtolites dilatus, Cyrtolites retrorsus
"Cyrtolites dilatatus" = Cyrtolites dilatus Ulrich and Scofield 1897
Cyrtolites retrorsus Ulrich and Scofield 1897 | |
Archinacella deleta, "Triblydium (Palacmacea) humilis" = Floripatella humilis
"Triblydium (Palacmacea) humilis" = Floripatella humilis Ulrich and Scofield 1897 "Triblydium" (Palacmacea) humilis
| |
"Platyceras depressum" = Helcionopsis depressum
"Platyceras depressum" = Helcionopsis depressum Ulrich and Scofield 1897 | |
| Bivalvia | |
|
Palaeoneilo sp. Hall and Whitfield 1869 clam | |
|
Similodonta sp. Soot-Ryen 1964 clam | |
|
Tancrediopsis sp. Beushausen 1895 clam
Ctenodonta sp. Salter 1852 clam | |
|
Vanuxemia sp. Billings 1858 clam
Cyrtodonta sp. Billings 1858 clam
Cyrtodontula sp. Tomlin 1931 clam | |
|
Modiolopsis sp. Hall 1847 clam
Modiolodon sp. Ulrich 1894 clam
Orthodesma sp. Hall and Whitfield 1875 clam
Aristerella sp. Ulrich 1894 clam | |
|
Plethocardia sp. clam | |
|
Lyrodesma sp. Conrad 1841 clam | |
| Gastropoda | |
|
Hormotoma gracilis Hall 1847 snail | |
Liospira americana, Liospira vitruvia, Liospira modesta, Liospira angustata, "Clathrospira conica" = Clathrospira conica, "Eunema clivosa" = Clathrospira conica, Clathrospira subconica, "Liospira abrupta" = Paraliospira abrupta, "Eotomaria supracingulata" = Paraliospira supracingulata
Liospira americana Billings 1860 snail
Liospira vitruvia Billings 1865 snail
Liospira modesta Ulrich and Scofield 1897 snail
Liospira angustata 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
"Liospira abrupta" = Paraliospira abrupta Ulrich and Scofield 1897 snail
"Eotomaria supracingulata" = Paraliospira supracingulata Billings 1857 snail | |
|
Fusispira vittata Hall 1847 snail
Fusispira spicula Sardeson 1892 snail
Subulites sp. Emmons 1842 snail | |
Trochonema retrorsum, "Trochonema unbilicatum" = Trochonema umbilicata
Trochonema retrorsum Ulrich and Scofield 1897 snail
"Trochonema unbilicatum" = Trochonema umbilicata Hall 1847 snail | |
"Lophospira concinnula" = Eunema concinnula, Eunema centralis, Gyronema pulchellum, Gyronema semicarinatum, "Lophospira oweni" = Paupospira oweni, "Lophospira peracuta" = Paupospira burginensis
"Lophospira concinnula" = Eunema concinnula Ulrich and Scofield 1897 snail [entered as Lophospira concinnulata]
Eunema centralis Ulrich and Scofield 1897 snail
Gyronema pulchellum Ulrich and Scofield 1897 snail
Gyronema semicarinatum Salter 1859 snail
"Lophospira oweni" = Paupospira oweni Ulrich and Scofield 1897 snail
"Lophospira peracuta" = Paupospira burginensis Ulrich and Scofield 1897 snail | |
"Strophostylus textilis" = Cyclonema textilis, Cyclonema varicosum
"Strophostylus textilis" = Cyclonema textilis Miller 1897 snail
Cyclonema varicosum Hall 1861 snail | |
"Rhaphistoma peracutum" = Scalites peracutum
"Rhaphistoma peracutum" = Scalites peracutum Ulrich and Scofield 1897 snail | |
|
Salpingostoma buelli Whitfield 1878 snail
"Bucania emmonsi" = Loxobucania emmonsi Ulrich and Scofield 1897 snail
Phragmolites obliquus Ulrich and Scofield 1897 snail | |
|
Tetranota bidorsata Hall 1847 snail
Tetranota sexcarinata Ulrich and Scofield 1897 snail
Tetranota obsoleta Ulrich and Scofield 1897 snail | |
"Carinopsis acuta" = Carinaropsis minima
"Carinopsis acuta" = Carinaropsis minima Ulrich and Scofield 1897 snail | |
Sinuites cancellatus, "Sinuites pervolutus" = Sinuites pervoluta
Sinuites cancellatus Hall 1847 snail
"Sinuites pervolutus" = Sinuites pervoluta Ulrich and Scofield 1897 snail | |