Sardeson Collection, Dunleith Formation, Wall Member, 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: Wall Member (Dunleith Formation), Shermanian (460.9 - 449.5 Ma)

• member-level stratigraphic resolution

Environment/lithology: argillaceous limestone

• Environmental call by T. Hanson.
• 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

Primary reference: 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]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 23805: authorized by Steven Holland, entered by Tori Hanson on 21.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Strophomenida - Sowerbyellidae
 Strophomenida - Rafinesquinidae
 Strophomenida - Strophomenidae
"Strophomena trilobita" = Strophomena trilobata
"Strophomena trilobita" = Strophomena trilobata Owen 1852
Rhynchonellata
 Rhynchonellida - Rhynchotrematidae
"Lepidocyclus capax" = Hiscobeccus capax
"Lepidocyclus capax" = Hiscobeccus capax Conrad 1842
 Orthida - Plaesiomyidae
"Plaesiomys meedsi" = Dinorthis meedsi
"Plaesiomys meedsi" = Dinorthis meedsi Winchell and Schuchert 1892
 Orthida - Hesperorthidae
 Orthida - Glyptorthidae
 Orthida - Dalmanellidae
Paucicrura rogata Sardeson 1892
 Atrypida - Cyclospiridae
 Atrypida - Anazygidae
"Zygospira recurvirostris" = Anazyga recurvirostra, Zygospira uphami
"Zygospira recurvirostris" = Anazyga recurvirostra Hall 1847
 Pentamerida - Parastrophinidae
Lingulata
 Lingulida - Pseudolingulidae
 Lingulida - Obolidae
 Lingulida - Lingulasmatidae
 Lingulida - Discinidae
Trilobita
 Asaphida - Asaphidae
Isotelus gigas Dekay 1824 trilobite
 Corynexochida - Illaenidae
Illaenus sp. Dalman 1827 trilobite
 Phacopida - Encrinuridae
"Encrinuroides vigilans" = Erratencrinurus vigilans
"Encrinuroides vigilans" = Erratencrinurus vigilans Hall 1847 trilobite
 Phacopida - Cheiruridae
Ceraurus pleurexanthemus Green 1832 trilobite