Sardeson Collection, Ion Formation, St. James Member, Illinois and Iowa: Kirkfieldian, Illinois, Iowa

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Lingulata - Lingulida - Pseudolingulidae
? Pseudolingula iowensis (Owen 1844)
Craniata - Craniida - Craniidae
Petrocrania trentonensis
Acanthocrania setigeria (Hall 1866)
recombined as Acanthocrania setigera
[entered as Acanthocrania setigera]
Strophomenata - Strophomenida - Sowerbyellidae
Sowerbyella curdsvillensis (Foerste 1912)
Strophomenata - Strophomenida - Furcitellidae
Oepikina inquassa
original and current combination Opikina
Oepikina minnesotensis (Winchell 1881)
Strophomenata - Strophomenida - Strophomenidae
Strophomena septata Winchell and Schuchert 1892
Strophomenata - Strophomenida - Rafinesquinidae
Rafinesquina trentonensis (Hall 1847)
Rhynchonellata - Atrypida - Anazygidae
Zygospira recurvirostris (Hall 1847)
recombined as Anazyga recurvirostra
Rhynchonellata - Protorthida - Skenidiidae
Skenidioides anthonense (Sardeson 1894)
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Rostricellula colei
Rhynchonellata - Rhynchonellida - Rhynchotrematidae
Rhynchotrema wisconsinense
Rhynchonellata - Orthida - Draboviidae
? Diorthelasma weissi Rice 1987
Pionodema circularis
Pionodema subaequata (Conrad 1843)
Rhynchonellata - Orthida - Dalmanellidae
Dalmanella cf. rara
Dalmanella ? sculpta Cooper 1956
Paucicrura rogata (Sardeson 1892)
Rhynchonellata - Orthida - Plaesiomyidae
Plaesiomys meedsi (Winchell and Schuchert 1892)
recombined as Dinorthis meedsi
Rhynchonellata - Orthida - Glyptorthidae
Glyptorthis bellarugosa (Conrad 1843)
Rhynchonellata - Orthida - Hesperorthidae
Hesperorthis tricenaria (Conrad 1843)
Rhynchonellata - Orthida - Platystrophiidae
Platystrophia amoena McEwan 1919
Platystrophia trentonensis McEwan 1919
Trilobita - Phacopida - Pterygometopidae
Eomonorachus intermedius (Walcott 1879)
Sceptaspis lincolnensis (Branson 1909)
Trilobita - Asaphida - Asaphidae
Isotelus gigas (Dekay 1824)
recombined as Asaphus gigas
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:Kirkfieldian
Key time interval:Kirkfieldian
Age range of interval:457.00000 - 449.80000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Galena Formation:Ion Member:St. James
Stratigraphic resolution:member
Lithology and environment
Primary lithology: "shale"
Includes fossils?Y
Lithology description: 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, R. E. Sloan, ed.
Environment:carbonate indet.
Taphonomy
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:23798
Authorizer:S. Holland Enterer:T. Hanson
Modifier:S. Holland Research group:marine invertebrate
Created:2002-07-21 13:30:04 Last modified:2004-10-22 12:58:14
Access level:the public Released:2002-07-21 13:30:04
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]