Sardeson Collection, Dubuque Formation, Illinois, 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: Amplexograptus manitoulinensis graptolite zone, Dubuque Formation (Galena Group), Edenian (451.0 - 450.2 Ma)

• formation-level stratigraphic resolution

Environment/lithology: argillaceous wackestone

• Environmental call by T. Hanson.
• 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. 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 23809: authorized by Steven Holland, entered by Tori Hanson on 21.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Corynexochida - Illaenidae
Bumastus orbicaudatus
Bumastus orbicaudatus Billings 1859 trilobite
 Phacopida - Calymenidae
"Flexicalymene senaria" = Flexicalymene (Flexicalymene) senaria
"Flexicalymene senaria" = Flexicalymene (Flexicalymene) senaria Conrad 1841 trilobite
 Phacopida - Cheiruridae
Ceraurinus icarus
Ceraurinus icarus Billings 1860 trilobite
 Asaphida - Asaphidae
Isotelus susae, Isotelus gigas, Isotelus iowensis
Isotelus susae Whitfield 1882 trilobite
Isotelus gigas Dekay 1824 trilobite
Isotelus iowensis Owen 1852 trilobite
Lingulata
 Lingulida - Discinidae
Orbiculoidea pelopea
 Lingulida - Pseudolingulidae
? Pseudolingula iowensis
 Lingulida - Lingulasmatidae
"Lingula philomela" = Lingulasma philomela
"Lingula philomela" = Lingulasma philomela Billings 1865
"Lingula" philomela
Rhynchonellata
 Rhynchonellida - Rhynchotrematidae
"Lepidocyclus capax" = Hiscobeccus capax
"Lepidocyclus capax" = Hiscobeccus capax Conrad 1842
 Orthida - Plaesiomyidae
Plaesiomys proavita, Austinella kankakensis
Plaesiomys proavita Winchell and Schuchert 1892
Austinella kankakensis McChesney 1861
 Orthida - Glyptorthidae
Glyptorthis bellarugosa
 Orthida - Dalmanellidae
Paucicrura corpulenta, ? Onniella porrecta
Paucicrura corpulenta Sardeson 1892
 Orthida - Heterorthidae
"? Eremotrema emacerata" = Heterorthina emacerata
"? Eremotrema emacerata" = Heterorthina emacerata Hall 1860
Strophomenata
 Orthotetida - Triplesiidae
Oxoplecia ulrichi
 Strophomenida - Sowerbyellidae
Sowerbyella minnesotensis
 Strophomenida - Furcitellidae
Megamyonia unicostata
Megamyonia unicostata Meek and Worthen 1868
 Strophomenida - Rafinesquinidae
Rafinesquina nitans, Rafinesquina deltoidea
 Strophomenida - Strophomenidae
"Strophomena cf. fluctuosa" = Nasutimena fluctuosa, "Strophomena trilobita" = Strophomena trilobata
"Strophomena cf. fluctuosa" = Nasutimena fluctuosa Billings 1860
"Strophomena trilobita" = Strophomena trilobata Owen 1852