Scales Shale, Elgin Member Gastropoda and Monoplacophora, Illinois and Iowa: Edenian - Maysvillian, Illinois, Iowa

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Tergomya - Archinacellida - Archinacellidae
Archinacella deleta (Sardeson 1892)
"Archinacella" deleta
Tergomya - Cyrtonellida - Cyrtolitidae
Cyrtolites disjunctus Ulrich and Scofield 1897
Gastropoda - Bellerophontida - Bucaniidae
Phragmolites dyeri (Hall 1872)
Salpingostoma imbricatum (Ulrich and Scofield 1897)
original and current combination Salpingostoma imbricata
Gastropoda - Bellerophontida - Sinuitidae
Sinuites concinnus (Ulrich and Scofield 1897)
synonym of Sinuites subcompressa
Sinuites cancellatus (Hall 1847)
Gastropoda - Murchisoniina - Straparollinidae
Meekospira subconica Ulrich and Scofield 1897
recombined as Daidia subconica
Gastropoda - Murchisoniina - Lophospiridae
Lophospira quadrisulcata Ulrich and Scofield 1897
[entered as Lophospira quadricucata]
    = Eunema quadrisulcata Ulrich and Scofield 1897
Wagner 2023
Gastropoda - Murchisoniina - Eotomariidae
Liospira micula (Hall and Whitney 1862)
Gastropoda - Murchisoniina - Hormotomidae
Hormotoma mulivolvis (Billings 1857)
recombined as Hormotoma multivolvis
Hormotoma gracilis (Hall 1847)
Bivalvia - Nuculanida - Cucullellidae
Nuculites sp. Conrad 1841
Bivalvia - Nuculanida - Malletiidae
Palaeoneilo sp. Hall and Whitfield 1869
Bivalvia - Nuculida - Praenuculidae
Similodonta sp. Soot-Ryen 1964
Bivalvia - Modiomorphida - Modiomorphidae
Modiolopsis sp. Hall 1847
Saffordia sp. Ulrich 1894
Orthodesma sp. Hall and Whitfield 1875
Bivalvia - Myalinida - Ambonychiidae
Ambonychiopsis sp. Isberg 1934
Bivalvia - Ostreida - Pterineidae
Pterinea sp. Goldfuss 1832
"Pterinea" sp.
Bivalvia - Cyrtodontida - Cyrtodontidae
Cyrtodonta sp. Billings 1858
Cyrtodontula sp. Tomlin 1931
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
Stage:Katian 10 m.y. bin:Ordovician 5
*Period:Late/Upper Ordovician *Local age/stage:Edenian - Maysvillian
Key time interval:Edenian - Maysvillian
Age range of interval:451.10000 - 449.80000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Maquoketa Formation:Scales Shale Member:Elgin
Lithology and environment
Primary lithology: "limestone"
Includes fossils?Y
Lithology description: Limestone, occasional shale partings. 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:23682
Authorizer:S. Holland, P. Wagner Enterer:T. Hanson, P. Wagner
Modifier:T. Hanson Research group:marine invertebrate
Created:2002-07-18 16:04:16 Last modified:2002-07-18 19:04:21
Access level:the public Released:2002-07-18 16:04:16
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]