PBDB Collection

Dunleith Fm, Fairplay 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: Fairplay Member (Dunleith Formation), Shermanian (457.3 - 449.6 Ma)

• member-level stratigraphic resolution

Environment/lithology: shale and limestone

• Environmental call by T. Hanson.

• Shale and laminated 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on a review of the Sardeson Collection at the University of Minnesota, Weiss (1953), Ulrich and Scofield (1895), the unpublished work of Levorson and Gerk, and the list in Stauffer and Thiel (1941)."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 23656: 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

Mammalia
Notoungulata - Leontiniidae	Colpodon sp. Colpodon sp. notoungulate
Bivalvia
Nuculida - Praenuculidae	Similodonta sp. Similodonta sp. Soot-Ryen 1964 clam
Solemyida - Ctenodontidae	Ctenodonta sp., Tancrediopsis sp. Ctenodonta sp. Salter 1852 clam Tancrediopsis sp. Beushausen 1895 clam
Nuculanida - Malletiidae	Palaeoneilo sp. Palaeoneilo sp. Hall and Whitfield 1869 clam
Nuculanida - Cucullellidae	Nuculites sp. Nuculites sp. Conrad 1841 clam
Pholadomyida -	Sphenolium sp. Sphenolium sp. Miller 1889 clam
Pholadomyida - Pholadomyidae	Rhytimya sp. Rhytimya sp. Ulrich 1893 clam
Cardiidia - Grammysiidae	Cuneamya sp. Cuneamya sp. Hall and Whitfield 1875 clam
Modiomorphida - Modiomorphidae	Modiolopsis sp., Aristerella sp., Orthodesma sp., Modiolodon sp., Prolobella sp., "Endodesma sp." = Cymatonota, Saffordia sp. Modiolopsis sp. Hall 1847 clam Aristerella sp. Ulrich 1894 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
Megalodontida - Plethocardiidae	Plethocardia sp. Plethocardia sp. clam
Unioni - Lyrodesmatidae	Lyrodesma sp. Lyrodesma sp. Conrad 1841 clam
Myalinida - Ambonychiidae	Cleionychia sp., Ambonychiopsis sp. Cleionychia sp. Ulrich 1892 clam Ambonychiopsis sp. Isberg 1934 clam
Cyrtodontida - Cyrtodontidae	Matheria sp., Cyrtodonta sp., Cyrtodontula sp., Vanuxemia sp. Matheria sp. Billings 1858 clam Cyrtodonta sp. Billings 1858 clam Cyrtodontula sp. Tomlin 1931 clam Vanuxemia sp. Billings 1858 clam
Tergomya
Tryblidiida - Tryblidiidae	"Platyceras depressum" = Helcionopsis depressum, Tryblidium humilis "Platyceras depressum" = Helcionopsis depressum Ulrich and Scofield 1897 [entered as Platyceras depresum] Tryblidium humilis "Triblydium" (Palacmacea) humilis
Scenelloidea - Scenellidae	Scenella compressa Scenella compressa Ulrich and Scofield 1897 "Scenella" compressa
Cyrtonellida - Cyrtolitidae	"Cyrtolites dilatatus" = Cyrtolites dilatus, Cyrtolites retrorsus "Cyrtolites dilatatus" = Cyrtolites dilatus Ulrich and Scofield 1897 Cyrtolites retrorsus Ulrich and Scofield 1897
Gastropoda
Euomphalina - Raphistomatidae	Raphistoma sp., "Raphistoma peracutum" = Scalites peracutum Raphistoma sp. Hall 1847 snail "Raphistoma peracutum" = Scalites peracutum Ulrich and Scofield 1897 snail
Euomphalina - Platyceratidae	Cyclonema varicosum, "Strophostylus textilis" = Cyclonema textilis Cyclonema varicosum Hall 1861 snail "Strophostylus textilis" = Cyclonema textilis Miller 1897 snail
Murchisoniina - Subulitidae	Subulites sp., Fusispira vittata, Fusispira spicula Subulites sp. Emmons 1842 snail Fusispira vittata Hall 1847 snail Fusispira spicula Sardeson 1892 snail
Murchisoniina - Eotomariidae	"Liospira abrupta" = Paraliospira abrupta, "Eotomaria supracingulata" = Paraliospira supracingulata, Liospira angustata, Liospira modesta, Liospira vitruvia, "Liospira progue" = Liospira progne, Clathrospira subconica, "Eunema clivosa" = Clathrospira conica "Liospira abrupta" = Paraliospira abrupta Ulrich and Scofield 1897 snail "Eotomaria supracingulata" = Paraliospira supracingulata Billings 1857 snail Liospira angustata Ulrich and Scofield 1897 snail Liospira modesta Ulrich and Scofield 1897 snail Liospira vitruvia Billings 1865 snail "Liospira progue" = Liospira progne Billings 1860 snail Clathrospira subconica Hall 1847 snail "Eunema clivosa" = Clathrospira conica Ulrich and Scofield 1897 snail
Murchisoniina - Hormotomidae	Hormotoma gracilis Hormotoma gracilis Hall 1847 snail
Murchisoniina - Trochonematidae	Trochonema fragile, "Trochonema unbilicatum" = Trochonema umbilicata, Trochonema retrorsum, 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 retrorsum Ulrich and Scofield 1897 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
Murchisoniina - Lophospiridae	Ectomaria prisca, "Lophospira pulchella" = Lophospira perangulata, "Lophospira perforata" = Lophospira perangulata, Lophospira obliqua, Lophospira spironema, "Lophospira serratula" = Lophospira serrulata, Gyronema sp., Gyronema semicarinatum, Gyronema pulchellum, "Lophospira concinnula" = Eunema concinnula, Eunema centralis, "Lophospira oweni" = Paupospira oweni, "Lophospira sumnerensis" = Paupospira sumnerensis, Paupospira burginensis 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 Gyronema sp. Ulrich and Scofield 1897 snail Gyronema semicarinatum Salter 1859 snail Gyronema pulchellum Ulrich and Scofield 1897 snail "Lophospira concinnula" = 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 [entered as Lophospira medialus]
Bellerophontida - Plectonotidae	Tetranota obsoleta, Tetranota sexcarinata, Tetranota bidorsata Tetranota obsoleta Ulrich and Scofield 1897 snail Tetranota sexcarinata Ulrich and Scofield 1897 snail Tetranota bidorsata Hall 1847 snail
Bellerophontida - Pterothecidae	"Carinaropsis acuta" = Carinaropsis minima "Carinaropsis acuta" = Carinaropsis minima Ulrich and Scofield 1897 snail
Bellerophontida - Sinuitidae	"Sinuites pervolutus" = Sinuites pervoluta, Sinuites cancellatus "Sinuites pervolutus" = Sinuites pervoluta Ulrich and Scofield 1897 snail Sinuites cancellatus Hall 1847 snail
Bellerophontida - Bucaniidae	Bucania sublata, Phragmolites obliquus, "Bucania emmonsi" = Loxobucania emmonsi, Salpingostoma buelli Bucania sublata Ulrich and Scofield 1897 snail Phragmolites obliquus Ulrich and Scofield 1897 snail "Bucania emmonsi" = Loxobucania emmonsi Ulrich and Scofield 1897 snail Salpingostoma buelli Whitfield 1878 snail