Dunleith Formation, Sherwood Member Cephalopods, Illinois, Iowa, Wisconsin (Ordovician of the United States)

Where: Illinois, Iowa, Wisconsin (43.0° N, 91.0° W: paleocoordinates 20.4° S, 63.1° W)

• coordinate estimated from map

• basin-level geographic resolution

When: Sherwood Member (Dunleith Formation), Shermanian (457.3 - 449.6 Ma)

• member-level stratigraphic resolution

Environment/lithology: calcareous 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 23775: authorized by Steven Holland, entered by Tori Hanson on 19.07.2002

Creative Commons license: CC BY (attribution)

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
 Orthocerida - Tripteroceratidae
Tripteroceras planoconvexum
 Orthocerida - Proteoceratidae
"Orthoceras junceum" = Isorthoceras junceum
"Orthoceras junceum" = Isorthoceras junceum Hall 1877
"Orthoceras" junceum
 Orthocerida - Orthoceratidae
Orthoceras beltrami, Michelinoceras multicameratum, Michelinoceras sp.
Orthoceras beltrami
"Orthoceras" beltrami
Michelinoceras sp. Foerste 1932
 Orthocerida - Dawsonoceratidae
? Metaspyroceras wisconsinense
 Orthocerida - Kionoceratidae
Polygrammoceras prestonense, Kionoceras decorahense
 Barrandeocerida - Barrandeoceratidae
Centrocyrtoceras rotundum
 Multiceratoidea - Clinoceratidae
Whitfieldoceras minimum, Whitfieldoceras cf. exiguum
 Cyrtocerinida - Cyrtocerinidae
Cyrtocerina schoolcrafti
 Oncocerida - Valcouroceratidae
? Manitoulinoceras wykoffense
 Oncocerida - Oncoceratidae
Oncoceras douglassi
 Oncocerida - Diestoceratidae
Diestoceras clarkei
 Discosorida - Westonoceratidae
Westonoceras minnesotense, Teichertoceras cf. husseyi
 Ascocerida - Probillingsitidae
Probillingsites milleri, Probillingsites welleri
 Endocerida - Endoceratidae
Cameroceras hennepini