Sardeson Collection, Scales Shale, Elgin Member, Illinois and Iowa: Edenian - Maysvillian, Illinois, Iowa

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Strophomenata - Orthotetida - Triplesiidae
Oxoplecia ulrichi
Strophomenata - Strophomenida - Sowerbyellidae
Eoplectodonta saxea
Sowerbyella minnesotensis (Sardeson 1892)
Eoplectodonta recedens (Sardeson 1892)
recombined as Thaerodonta recedens
Strophomenata - Strophomenida - Furcitellidae
Megamyonia unicostata (Meek and Worthen 1868)
Strophomenata - Strophomenida - Rafinesquinidae
Rafinesquina nitans
Rafinesquina deltoidea (Conrad 1838)
Rafinesquina trentonensis (Hall 1847)
Strophomenata - Strophomenida - Strophomenidae
Strophomena trilobita (Owen 1852)
recombined as Strophomena trilobata
Strophomena occidentalis (Foerste 1912)
Strophomena cf. fluctuosa Billings 1860
recombined as Nasutimena fluctuosa
Rhynchonellata - Rhynchonellida - Rhynchotrematidae
Lepidocyclus capax (Conrad 1842)
recombined as Hiscobeccus capax
Rhynchonellata - Orthida - Plaesiomyidae
Austinella kankakensis (McChesney 1861)
Plaesiomys subquadrata (Hall 1847)
recombined as Plaesiomys subquadratus
Plaesiomys proavita (Winchell and Schuchert 1892)
Rhynchonellata - Orthida - Glyptorthidae
Glyptorthis bellarugosa (Conrad 1843)
Glyptorthis insculpta (Hall 1847)
Rhynchonellata - Orthida - Heterorthidae
? Eremotrema emacerata (Hall 1860)
recombined as Heterorthina emacerata
Rhynchonellata - Orthida - Dalmanellidae
Paucicrura rogata (Sardeson 1892)
Paucicrura corpulenta (Sardeson 1892)
? Onniella porrecta
Rhynchonellata - Orthida - Platyorthidae
Diceromyonia ignota
Rhynchonellata - Atrypida - Anazygidae
Zygospira modesta (Hall 1847)
Lingulata - Lingulida - Pseudolingulidae
? Pseudolingula iowensis (Owen 1844)
Lingulata - Lingulida - Obolidae
Lingulops sp. Hall 1871
Lingulata - Lingulida - Lingulasmatidae
Lingula philomela Billings 1865
recombined as Lingulasma philomela
"Lingula" philomela
Lingulata - Lingulida - Discinidae
Orbiculoidea pelopea
Trilobita - Asaphida - Asaphidae
Isotelus gigas (Dekay 1824)
recombined as Asaphus gigas
Isotelus iowensis (Owen 1852)
Isotelus susae (Whitfield 1882)
Trilobita - Corynexochida - Illaenidae
Bumastus orbicaudatus (Billings 1859)
Trilobita - Phacopida - Encrinuridae
Encrinuroides vigilans (Hall 1847)
recombined as Erratencrinurus vigilans
Trilobita - Phacopida - Cheiruridae
Ceraurinus icarus (Billings 1860)
Ceraurus pleurexanthemus Green 1832
Trilobita - Phacopida - Calymenidae
Flexicalymene senaria (Conrad 1841)
recombined as Flexicalymene (Flexicalymene) senaria
Calymene mamillate (Hall 1861)
recombined as Thelecalymene mammillata
Trilobita - Phacopida - Pterygometopidae
Eomonorachus intermedius (Walcott 1879)
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
*Period:Late/Upper Ordovician *Local age/stage:Edenian - Maysvillian
Key time interval:Edenian - Maysvillian Graptolite zone: Amplexograptus manitoulinensis
Age range of interval:460.90000 - 449.50000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Maquoketa Formation:Scales Shale Member:Elgin
Stratigraphic resolution:member
Stratigraphy comments: Elgin probably is Maysvillian only.
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
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:23810
Authorizer:S. Holland Enterer:T. Hanson
Modifier:P. Wagner Research group:marine invertebrate
Created:2002-07-21 19:08:18 Last modified:2018-03-24 01:03:07
Access level:the public Released:2002-07-21 19:08:18
Creative Commons license:CC BY
Reference information

Primary reference:

6752. J. A. Catalani. 1987. Biostratigraphy of the Middle and Late Ordovician cephalopods of the Upper Mississippi Valley area. In R. E. Sloan (ed.), Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 187-189 [S. Holland/T. Hanson/S. Bruning]