PBDB Collection

Nachusa Formation 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: Nachusa 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 23757: 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

unclassified
-	Bodeiceras oxygonum, Zittelloiceras beloitense, Zittelloiceras clarkeanum, Zittelloiceras scofieldi Bodeiceras oxygonum Zittelloiceras beloitense Zittelloiceras clarkeanum Zittelloiceras scofieldi
Cephalopoda
Barrandeocerida - Barrandeoceratidae	? Antiplectoceras sp., Centrocyrtoceras duplicostatum ? Antiplectoceras sp. Foerste and Savage 1927 Centrocyrtoceras duplicostatum
Barrandeocerida - Plectoceratidae	Plectoceras robertsoni, Plectoceras occidentale Plectoceras robertsoni Plectoceras occidentale
Discosorida - Westonoceratidae	Reedsoceras macrostomum Reedsoceras macrostomum
Discosorida - Cyrtogomphoceratidae	Ulrichoceras beloitense Ulrichoceras beloitense
Ascocerida - Probillingsitidae	? Redpathoceras sp. ? Redpathoceras sp. Flower 1963
Ascocerida - Hebetoceratidae	? Hebetoceras sp. ? Hebetoceras sp. Flower 1941
Multiceratoidea - Clinoceratidae	Whitfieldoceras mumiaforme, Whitfieldoceras clarkei Whitfieldoceras mumiaforme Whitfieldoceras clarkei
Oncocerida - Oncoceratidae	Richardsonoceras simplex, Richardsonoceras beloitense, Richardsonoceras romingeri, ? Richardsonoceras scofieldi, ? Richardsonoceras clarkei, Cyrtorizoceras minneapolis, Oncoceras abruptum, Oncoceras tetreauvillense, Kentlandoceras husseyi, Kentlandoceras cf. schrocki, Loganoceras sp., Beloitoceras lycum, Beloitoceras janesvillense, Beloitoceras carveri, Beloitoceras norwoodi, Beloitoceras houghtoni, Beloitoceras cf. huronense, Beloitoceras pandion, Beloitoceras plebeium Richardsonoceras simplex Richardsonoceras beloitense Richardsonoceras romingeri ? Richardsonoceras scofieldi ? Richardsonoceras clarkei Cyrtorizoceras minneapolis Clarke 1897 Oncoceras abruptum Oncoceras tetreauvillense Kentlandoceras husseyi Kentlandoceras cf. schrocki Loganoceras sp. Foerste 1932 Beloitoceras lycum Beloitoceras janesvillense Beloitoceras carveri Beloitoceras norwoodi Beloitoceras houghtoni Beloitoceras cf. huronense Billings 1865 Beloitoceras pandion Hall 1861 Beloitoceras plebeium Hall 1861
Oncocerida - Diestoceratidae	Diestoceras alceum, Diestoceras sp. Diestoceras alceum Diestoceras sp. Foerste 1924
Oncocerida - Valcouroceratidae	Manitoulinoceras neleum, ? Fayettoceras beloitense, Valcouroceras sp. Manitoulinoceras neleum ? Fayettoceras beloitense Valcouroceras sp. Flower 1943
Multiceratoidea - Apsidoceratidae	Chidleyenoceras sp. Chidleyenoceras sp. Shimizu and Obata 1935
Cyrtocerinida - Cyrtocerinidae	Cyrtocerina schoolcrafti Cyrtocerina schoolcrafti
Orthocerida - Dawsonoceratidae	Metaspyroceras minneapolis, ? Metaspyroceras nicolleti Metaspyroceras minneapolis ? Metaspyroceras nicolleti
Orthocerida - Orthoceratidae	Michelinoceras multicameratum, Michelinoceras sp. Michelinoceras multicameratum Michelinoceras sp. Foerste 1932
Orthocerida - Tripteroceratidae	Tripteroceras planoconvexum, Tripteroceras oweni, Tripteroceras scofieldi, Allumettoceras planodorsatum, Allumettoceras cf. carletonense Tripteroceras planoconvexum Tripteroceras oweni Tripteroceras scofieldi Allumettoceras planodorsatum Allumettoceras cf. carletonense Allumettoceras planodorsatum carletonense
Orthocerida - Proteoceratidae	"Orthoceras junceum" = Isorthoceras junceum, Gorbyoceras sp. "Orthoceras junceum" = Isorthoceras junceum Hall 1877 "Orthoceras" junceum Gorbyoceras sp. Shimizu and Obata 1935
Actinocerida - Gonioceratidae	Gonioceras occidentale, Gonioceras homerense, Gonioceras anceps Gonioceras occidentale Gonioceras homerense Gonioceras occidentale homerense Gonioceras anceps Hall 1847
Actinocerida - Ormoceratidae	Deiroceras scofieldi Deiroceras scofieldi
Actinocerida - Actinoceratidae	Actinoceras bigsbyi, Actinoceras beloitense, Actinoceras janesvillensis Actinoceras bigsbyi Actinoceras beloitense Actinoceras janesvillensis [entered as Actinoceras janesvillense]
Dissidocerida - Geisonoceratidae	Geisonoceras scofieldi Geisonoceras scofieldi
Pseudorthocerida - Spyroceratidae	Spyroceras lesueuri, Spyroceras cylindratum Spyroceras lesueuri "Spyroceras" lesueri Spyroceras cylindratum Foerste 1932 "Spyroceras" cylindratum
Endocerida - Endoceratidae	Endoceras sp., Endoceras proteiforme, Cameroceras cf. alternatum, Cameroceras sp., "Endoceras cf. annulatum" = Cyclendoceras annulatum Endoceras sp. Hall 1847 Endoceras proteiforme Hall 1847 Cameroceras cf. alternatum Cameroceras sp. Conrad 1842 "Endoceras cf. annulatum" = Cyclendoceras annulatum Hall 1847