Nachusa Formation Cephalopods, Illinois, Iowa, Wisconsin: Blackriveran, Illinois, Iowa, Wisconsin
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Bodeiceras oxygonum
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Zittelloiceras beloitense
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Zittelloiceras clarkeanum
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Zittelloiceras scofieldi
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Cephalopoda
- Clinoceratidae
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Whitfieldoceras mumiaforme
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Whitfieldoceras clarkei
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Cephalopoda
- Discosorida
- Westonoceratidae
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Reedsoceras macrostomum
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Cephalopoda
- Discosorida
- Cyrtogomphoceratidae
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Ulrichoceras beloitense
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Cephalopoda
- Ascocerida
- Probillingsitidae
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? Redpathoceras sp.
Flower 1963
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Cephalopoda
- Ascocerida
- Hebetoceratidae
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? Hebetoceras sp.
Flower 1941
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Cephalopoda
- Apsidoceratidae
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Chidleyenoceras sp.
Shimizu and Obata 1935
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Cephalopoda
- Oncocerida
- Oncoceratidae
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Loganoceras sp.
Foerste 1932
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Kentlandoceras husseyi
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Kentlandoceras cf. schrocki
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Beloitoceras lycum
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Beloitoceras janesvillense
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Beloitoceras carveri
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Beloitoceras norwoodi
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Beloitoceras houghtoni
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Beloitoceras cf. huronense
(Billings 1865)
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Beloitoceras plebeium
(Hall 1861)
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Beloitoceras pandion
(Hall 1861)
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Cyrtorizoceras minneapolis
(Clarke 1897)
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| original and current combination Cyrtoceras minneapolis | ||||||||||
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Oncoceras abruptum
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Oncoceras tetreauvillense
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Richardsonoceras simplex
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Richardsonoceras beloitense
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Richardsonoceras romingeri
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? Richardsonoceras scofieldi
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? Richardsonoceras clarkei
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Cephalopoda
- Oncocerida
- Diestoceratidae
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Diestoceras alceum
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Diestoceras sp.
Foerste 1924
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Cephalopoda
- Oncocerida
- Valcouroceratidae
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? Fayettoceras beloitense
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Manitoulinoceras neleum
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Valcouroceras sp.
Flower 1943
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Cephalopoda
- Cyrtocerinida
- Cyrtocerinidae
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Cyrtocerina schoolcrafti
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Cephalopoda
- Pseudorthocerida
- Spyroceratidae
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Spyroceras lesueuri
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| "Spyroceras" lesueri | ||||||||||
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Spyroceras cylindratum
Foerste 1932
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| "Spyroceras" cylindratum | ||||||||||
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Cephalopoda
- Barrandeocerida
- Barrandeoceratidae
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Centrocyrtoceras duplicostatum
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? Antiplectoceras sp.
Foerste and Savage 1927
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Cephalopoda
- Barrandeocerida
- Plectoceratidae
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Plectoceras robertsoni
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Plectoceras occidentale
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Cephalopoda
- Orthocerida
- Tripteroceratidae
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Tripteroceras planoconvexum
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Tripteroceras oweni
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Tripteroceras scofieldi
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Allumettoceras planodorsatum
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Allumettoceras cf. carletonense
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| Allumettoceras planodorsatum carletonense | ||||||||||
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Cephalopoda
- Orthocerida
- Orthoceratidae
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Michelinoceras multicameratum
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Michelinoceras sp.
Foerste 1932
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Cephalopoda
- Orthocerida
- Proteoceratidae
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Gorbyoceras sp.
Shimizu and Obata 1935
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Orthoceras junceum
Hall 1847
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| recombined as Isorthoceras junceum | ||||||||||
| "Orthoceras" junceum | ||||||||||
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Cephalopoda
- Orthocerida
- Dawsonoceratidae
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Metaspyroceras minneapolis
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? Metaspyroceras nicolleti
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Cephalopoda
- Actinocerida
- Actinoceratidae
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Actinoceras bigsbyi
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Actinoceras beloitense
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Actinoceras janesvillensis
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| [entered as Actinoceras janesvillense] | ||||||||||
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Cephalopoda
- Actinocerida
- Gonioceratidae
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Gonioceras occidentale
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Gonioceras homerense
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| Gonioceras occidentale homerense | ||||||||||
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Gonioceras anceps
Hall 1847
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Cephalopoda
- Actinocerida
- Ormoceratidae
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Deiroceras scofieldi
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Cephalopoda
- Dissidocerida
- Geisonoceratidae
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Geisonoceras scofieldi
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Cephalopoda
- Endocerida
- Endoceratidae
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Endoceras sp.
Hall 1847
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Endoceras proteiforme
Hall 1847
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Endoceras cf. annulatum
Hall 1847
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| recombined as Cyclendoceras annulatum | ||||||||||
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Cameroceras cf. alternatum
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Cameroceras sp.
Conrad 1842
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Illinois, Iowa, Wisconsin |
| Coordinates: | 43.0° North, 91.0° West (view map) | ||
| Paleocoordinates: | 20.4° South, 63.1° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | basin |
Time
| Period: | Ordovician | Epoch: | Late/Upper Ordovician |
| 10 m.y. bin: | Ordovician 4-5 | ||
| *Period: | Middle Ordovician - Late/Upper Ordovician | *Local age/stage: | Blackriveran |
| Key time interval: | Blackriveran | ||
| Age range of interval: | 457.00000 - 449.80000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Nachusa |
| Stratigraphic resolution: | formation |
Lithology and environment
Taphonomy
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Taxonomic list comments: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 | |
Metadata
| Database number: | 23757 | ||
| Authorizer: | S. Holland | Enterer: | T. Hanson |
| Modifier: | S. Holland | Research group: | marine invertebrate |
| Created: | 2002-07-19 12:56:02 | Last modified: | 2004-10-22 11:31:17 |
| Access level: | the public | Released: | 2002-07-19 12:56:02 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 6752. | 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] |