Glenwood Formation Cephalopods, Minnesota (Ordovician of the United States)

Where: Minnesota (45.0° N, 93.0° W: paleocoordinates 17.9° S, 62.6° W)

• coordinate estimated from map

• basin-level geographic resolution

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

• formation-level stratigraphic resolution

Environment/lithology:

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 23690: authorized by Steven Holland, entered by Tori Hanson on 18.07.2002

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, Tripteroceras scofieldi, Allumettoceras planodorsatum
 Orthocerida - Orthoceratidae
Michelinoceras sp.
Michelinoceras sp. Foerste 1932
 Orthocerida - Dawsonoceratidae
Metaspyroceras minneapolis, ? Metaspyroceras nicolleti
 Dissidocerida - Geisonoceratidae
Geisonoceras scofieldi
 Actinocerida - Ormoceratidae
Deiroceras scofieldi
 Actinocerida - Actinoceratidae
Actinoceras beloitense, Actinoceras janesvillensis, Actinoceras gravicentrum
Actinoceras janesvillensis
[entered as Actinoceras janesvillense]
 Actinocerida - Gonioceratidae
Gonioceras occidentale
 Pseudorthocerida - Spyroceratidae
Spyroceras lesueuri, Spyroceras cylindratum
Spyroceras lesueuri
"Spyroceras" lesueuri; valid species but no revision of generic name
Spyroceras cylindratum Foerste 1932
"Spyroceras" cylindratum; valid species but no revision of generic name
 Barrandeocerida - Barrandeoceratidae
? Antiplectoceras sp., Centrocyrtoceras annulatum, Centrocyrtoceras duplicostatum
? Antiplectoceras sp. Foerste and Savage 1927
 Barrandeocerida - Plectoceratidae
Plectoceras robertsoni, Plectoceras occidentale
 Multiceratoidea - Clinoceratidae
Whitfieldoceras mumiaforme, Whitfieldoceras clarkei
 Cyrtocerinida - Cyrtocerinidae
Cyrtocerina sp., Cyrtocerina crenulata
Cyrtocerina sp. Billings 1865
Cyrtocerina crenulata Flower 1952
 Multiceratoidea - Apsidoceratidae
Chidleyenoceras sp.
Chidleyenoceras sp. Shimizu and Obata 1935
 Oncocerida - Valcouroceratidae
? Fayettoceras beloitense, Staufferoceras featherstonhaughi
 Oncocerida - Oncoceratidae
Kentlandoceras husseyi, Loganoceras sp., Beloitoceras janesvillense, Beloitoceras pandion, Zittelloceras percurvatum, ? Zittelloceras brevicurvatum, ? Zittelloceras tenuistriatum
Loganoceras sp. Foerste 1932
 Oncocerida - Diestoceratidae
Diestoceras alceum
 Discosorida - Westonoceratidae
Reedsoceras macrostomum
 Discosorida - Cyrtogomphoceratidae
Ulrichoceras beloitense
 Endocerida - Endoceratidae
Endoceras sp., Endoceras proteiforme, Cameroceras cf. alternatum, Cameroceras sp., "Endoceras cf. annulatum" = Cyclendoceras annulatum
Endoceras sp. Hall 1847
Cameroceras sp. Conrad 1842
"Endoceras cf. annulatum" = Cyclendoceras annulatum Hall 1847