Pecatonica Formation Cephalopods, Illinois, Iowa, Wisconsin (Ordovician of the United States)

Where: Illinois, Iowa, Wisconsin (43.0° N, 91.0° W)

• Paleocoordinates: 10.7° S, 114.9° W (Wright 2013)

• coordinate estimated from map

• basin-level geographic resolution

When: Pecatonica Formation, Blackriveran (457.3 - 449.6 Ma)

• formation-level stratigraphic resolution

Environment/lithology: limestone

• Lithology and environment taken from Kolata, D. R. "Lithostratigraphy of the Plateville, Galena and Maquoketa Groups in Northern Illinois." Middle and Late Ordovician Lithostratigraphy and Biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35, p. 21-24. R. E. Sloan, ed.

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 23752: authorized by Steven Holland, entered by Tori Hanson on 19.07.2002

Creative Commons license: CC0 (CC0)

Taxonomic list

• Faunal list compiled from: 1. Whitfield's (1882) report in volume 4 of Chamberlin's Geology of Wisconsin 2. Clarke's (1897) report in volume III part 2 of Winchell's Final Reports of the Minnesota Geological and Natural History Survey 3. Bassler's Index 4. Individual articles (Foerste, Flower, etc.) 5. Treatise, Part K 6. Author's personal field data.
Show authors, comments, and common names
Cephalopoda
 Endocerida - Endoceratidae
Endoceras proteiforme
 Barrandeocerida - Barrandeoceratidae
? Antiplectoceras sp., Centrocyrtoceras annulatum, Centrocyrtoceras duplicostatum
? Antiplectoceras sp. Foerste and Savage 1927
 Discosorida - Westonoceratidae
Reedsoceras macrostomum
 Oncocerida - Valcouroceratidae
Staufferoceras featherstonhaughi, ? Fayettoceras beloitense
 Oncocerida - Oncoceratidae
Zittelloceras percurvatum, ? Zittelloceras brevicurvatum, ? Zittelloceras tenuistriatum, Beloitoceras janesvillense, Beloitoceras pandion, Kentlandoceras husseyi
 Oncocerida - Diestoceratidae
Diestoceras alceum
 Cyrtocerinida - Cyrtocerinidae
Cyrtocerina sp., Cyrtocerina crenulata
Cyrtocerina sp. Billings 1865
Cyrtocerina crenulata Flower 1952
 Orthocerida - Orthoceratidae
Michelinoceras sp.
Michelinoceras sp. Foerste 1932
 Orthocerida - Dawsonoceratidae
? Metaspyroceras nicolleti
 Orthocerida - Tripteroceratidae
Tripteroceras scofieldi
 Orthocerida - Proteoceratidae
Gorbyoceras sp.
Gorbyoceras sp. Shimizu and Obata 1935
 Dissidocerida - Geisonoceratidae
Geisonoceras scofieldi
 Actinocerida - Gonioceratidae
Gonioceras occidentale
 Actinocerida - Ormoceratidae
Deiroceras scofieldi
 Actinocerida - Actinoceratidae
Actinoceras bigsbyi, Actinoceras beloitense, Actinoceras gravicentrum