Dunleith Fm, Fairplay Member Gastropoda and Monoplacophora, Illinois and Iowa: Shermanian, Illinois, Iowa

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Eunema simile Ulrich and Scofield 1897
Colpodon sp.
Tergomya - Tryblidiida - Tryblidiidae
Triblydium (Palacmacea) humilis (Ulrich and Scofield 1897)
"Triblydium" (Palacmacea) humilis
    = Tryblidium humilis
Wagner 2023
Platyceras depressum Ulrich and Scofield 1897
recombined as Helcionopsis depressum
[entered as Platyceras depresum]
Tergomya - Cyrtonellida - Cyrtolitidae
Cyrtolites dilatatus (Ulrich and Scofield 1897)
original and current combination Cyrtolites dilatus
Cyrtolites retrorsus Ulrich and Scofield 1897
Tergomya - Scenellidae
Scenella compressa Ulrich and Scofield 1897
"Scenella" compressa
Gastropoda - Bellerophontida - Pterothecidae
Carinopsis acuta (Ulrich and Scofield 1897)
    = Carinaropsis acuta Ulrich and Scofield 1897
Wagner 2023
synonym of Carinaropsis minima
Gastropoda - Bellerophontida - Sinuitidae
Sinuites cancellatus (Hall 1847)
Sinuites pervolutus (Ulrich and Scofield 1897)
recombined as Sinuites pervoluta
Gastropoda - Bellerophontida - Bucaniidae
Salpingostoma buelli (Whitfield 1878)
Bucania emmonsi Ulrich and Scofield 1897
recombined as Loxobucania emmonsi
Phragmolites obliquus (Ulrich and Scofield 1897)
Bucania sublata Ulrich and Scofield 1897
Gastropoda - Bellerophontida - Plectonotidae
Tetranota obsoleta Ulrich and Scofield 1897
Tetranota sexcarinata Ulrich and Scofield 1897
Tetranota bidorsata (Hall 1847)
Gastropoda - Murchisoniina - Hormotomidae
Hormotoma gracilis (Hall 1847)
Gastropoda - Murchisoniina - Trochonematidae
Trochonema unbilicatum (Hall 1847)
recombined as Trochonema umbilicata
Trochonema fragile Ulrich and Scofield 1897
Trochonema altum Ulrich and Scofield 1897
Trochonema retrorsum Ulrich and Scofield 1897
Trochonema subcrassum Ulrich and Scofield 1897
Eunema salteri Ulrich and Scofield 1897
replaced by Globonema niota
Eunema robbinsi (Ulrich and Scofield 1897)
synonym of Globonema niota
Gastropoda - Murchisoniina - Lophospiridae
Ectomaria prisca (Billings 1859)
Lophospira medialis Ulrich and Scofield 1897
[entered as Lophospira medialus]
    = Pauospira burginensis
Wagner 2023
was supposed to be L. medialis
    = Paupospira burginensis Ulrich and Scofield 1897
Wagner 2023
was supposed to be L. medialis
Lophospira oweni Ulrich and Scofield 1897
recombined as Paupospira oweni
Lophospira sumnerensis (Safford 1869)
recombined as Paupospira sumnerensis
Gyronema pulchellum Ulrich and Scofield 1897
Gyronema semicarinatum (Salter 1859)
Lophospira concinnula Ulrich and Scofield 1897
recombined as Eunema concinnula
Lophospira bicincta (Hall 1847)
    = Eunema centralis Ulrich and Scofield 1897
Wagner 2023
Lophospira obliqua Ulrich and Scofield 1897
Lophospira serratula (Salter 1859)
recombined as Lophospira serrulata
Lophospira perforata Ulrich and Scofield 1897
synonym of Lophospira perangulata
Lophospira pulchella Ulrich and Scofield 1897
synonym of Lophospira perangulata
Lophospira spironema Ulrich and Scofield 1897
Gastropoda - Murchisoniina - Eotomariidae
Liospira modesta Ulrich and Scofield 1897
Liospira angustata Ulrich and Scofield 1897
Liospira progue (Billings 1860)
recombined as Liospira progne
Liospira vitruvia (Billings 1865)
Eunema clivosa (Sardeson 1892)
synonym of Clathrospira conica
Clathrospira subconica (Hall 1847)
Eotomaria supracingulata (Billings 1857)
recombined as Paraliospira supracingulata
Liospira abrupta Ulrich and Scofield 1897
recombined as Paraliospira abrupta
Gastropoda - Murchisoniina - Subulitidae
Fusispira vittata (Hall 1847)
Fusispira spicula Sardeson 1892
Subulites sp. Emmons 1842
Gastropoda - Euomphalina - Platyceratidae
Strophostylus textilis (Miller 1897)
corrected as Cyclonema textilis
Cyclonema varicosum (Hall 1861)
Gastropoda - Euomphalina - Raphistomatidae
Raphistoma sp. Hall 1847
Raphistoma peracutum Ulrich and Scofield 1897
recombined as Scalites peracutum
Bivalvia - Nuculanida - Malletiidae
Palaeoneilo sp. Hall and Whitfield 1869
Bivalvia - Nuculanida - Cucullellidae
Nuculites sp. Conrad 1841
Bivalvia - Nuculida - Praenuculidae
Similodonta sp. Soot-Ryen 1964
Bivalvia - Solemyida - Ctenodontidae
Tancrediopsis sp. (Beushausen 1895)
original and current combination Ctenodonta (Tancrediopsis)
Ctenodonta sp. Salter 1852
Bivalvia - Myalinida - Ambonychiidae
Ambonychiopsis sp. Isberg 1934
Cleionychia sp. Ulrich 1892
Bivalvia - Cyrtodontida - Cyrtodontidae
Vanuxemia sp. Billings 1858
Matheria sp. Billings 1858
Cyrtodonta sp. Billings 1858
Cyrtodontula sp. Tomlin 1931
Bivalvia - Grammysiidae
Cuneamya sp. Hall and Whitfield 1875
Bivalvia - Modiomorphida - Modiomorphidae
Modiolopsis sp. Hall 1847
Orthodesma sp. Hall and Whitfield 1875
Modiolodon sp. Ulrich 1894
Prolobella sp. Ulrich 1894
Endodesma sp. Ulrich 1894
synonym of Cymatonota
Saffordia sp. Ulrich 1894
Aristerella sp. Ulrich 1894
Bivalvia - Megalodontida - Plethocardiidae
Plethocardia sp.
Bivalvia - Pholadomyida - Pholadomyidae
Rhytimya sp. Ulrich 1893
Bivalvia - Pholadomyida
Sphenolium sp. Miller 1889
Bivalvia - Lyrodesmatidae
Lyrodesma sp. Conrad 1841
see common names

Geography
Country:United States State/province:Illinois, Iowa
Coordinates: 42.0° North, 90.5° West (view map)
Paleocoordinates:21.3° South, 63.6° West
Basis of coordinate:estimated from map
Geographic resolution:basin
Time
Period:Ordovician Epoch:Late/Upper Ordovician
10 m.y. bin:Ordovician 4-5
*Period:Middle Ordovician - Late/Upper Ordovician *Local age/stage:Shermanian
Key time interval:Shermanian
Age range of interval:457.00000 - 449.80000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Galena Formation:Dunleith Member:Fairplay
Stratigraphic resolution:member
Lithology and environment
Primary lithology: "shale"
Secondary lithology: "limestone"
Includes fossils?Y
Includes fossils?Y
Lithology description: 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.
Environment:carbonate indet.
Geology comments: Environmental call by T. Hanson.
Taphonomy
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection,survey of museum collection
Reason for describing collection:biostratigraphic analysis
Collection method comments: "[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)."
Metadata
Database number:23656
Authorizer:S. Holland, P. Wagner Enterer:T. Hanson, P. Wagner
Modifier:S. Holland Research group:marine invertebrate
Created:2002-07-18 10:44:33 Last modified:2004-10-22 12:00:49
Access level:the public Released:2002-07-18 10:44:33
Creative Commons license:CC BY
Reference information

Primary reference:
6737. 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]

Secondary references:

9042 P. J. Wagner. 2023. Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database (2006 - 2023). [P. Wagner/P. Wagner/P. Wagner]