Cottonwood Canyon (FMNH excavation): Lochkovian, Wyoming
collected by R.H. Denison, E.S. Richardson 1962
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Dipnoi
- Uranolophidae
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Uranolophus wyomingensis
Denison 1968
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Elliot and Johnson 1997 | |||||||||
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Placodermi
- Arthrodira
- Actinolepidae
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| Elliot and Johnson 1997 | ||||||||||
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Simblaspis sp.
Denison 1958
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Elliot and Johnson 1997 | |||||||||
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Petromyzontida
- Cephalaspidiformes
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| Elliot and Johnson 1997 | ||||||||||
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Pteraspidomorpha
- Pteraspidiformes
- Protaspididae
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| Denison 1970 | ||||||||||
| Denison 1970 | ||||||||||
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Pteraspidomorpha
- Pteraspidiformes
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| Elliot and Johnson 1997 | ||||||||||
| Elliot and Johnson 1997 | ||||||||||
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Pteraspidomorpha
- Cardipeltidae
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| Elliot and Johnson 1997 | ||||||||||
| Elliot and Johnson 1997 | ||||||||||
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Arachnida
- Scorpiones
- Proscorpiidae
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Hydroscorpius denisoni n. gen., n. sp.
Kjellesvig-Waering 1986
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1 specimen | |||||||||
| FMNH PE 6176 | ||||||||||
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Arachnida
- Scorpiones
- Branchioscorpionidae
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Branchioscorpio richardsoni n. gen., n. sp.
Kjellesvig-Waering 1986
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1 specimen | |||||||||
| FMNH PE 6176a,b | ||||||||||
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Arachnida
- Scorpiones
- Praearcturidae
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| 1 specimen | ||||||||||
| FMNH PE 26080B | ||||||||||
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Arachnida
- Scorpiones
- Acanthoscorpionidae
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Acanthoscorpio mucronatus n. gen., n. sp.
Kjellesvig-Waering 1986
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1 specimen | |||||||||
| FMNH PE 6177ab | ||||||||||
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Eurypterida
- Pterygotidae
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Jaekelopterus cf. howelli
Kjellesvig-Waering and Stoermer 1952
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Lamsdell and Legg 2010 | |||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Wyoming |
| Coordinates: | 44.9° North, 108.1° West (view map) | ||
| Paleocoordinates: | 22.2° South, 82.6° West (Wright 2013) | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Devonian | Epoch: | Early Devonian |
| Stage: | Lochkovian | 10 m.y. bin: | Devonian 1 |
| Key time interval: | Lochkovian | Conodont zone: | Pedavis pesavis |
| Age range of interval: | 419.62 - 413.02 m.y. ago |
Stratigraphy
| Formation: | Beartooth Butte | Member: | "Cottonwood Canyon" | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Vertebrate biostratigraphy (Elliot and Ilyes, 1996) indicates that the Cottonwood Canyon section is Pragian whereas the type section at Beartooth Butte is Emsian. PJW: Bleick & Coultier (2000) put this in the Pedavis pesavis zone, which is uppermost Lockhovian. I have put this in an informal "Cottonwood Canyon" member because it seems probable that this part of the Beartooth Butte will be separated into a unique formation. | |||||
Lithology and environment
| Primary lithology: | lithified "siliciclastic" |
| Environment: | estuary/bay |
| Geology comments: Stable oxygen and isotope data (Poulson in Fiorillo, 2000) indicate that the Beartooth Butte Formation was deposited in an estuarine environment, with the Cottonwood Canyon section being slightly less saline than the type section. | |
Taphonomy
| Modes of preservation: | adpression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | FMNH | ||
| Collectors: | R.H. Denison, E.S. Richardson | Collection dates: | 1962 |
Metadata
| Database number: | 153534 | ||
| Authorizer: | M. Clapham, R. Plotnick, P. Wagner | Enterer: | M. Clapham, R. Plotnick, P. Wagner |
| Modifier: | R. Plotnick | Research group: | marine invertebrate,paleoentomology |
| Subset of collection #: | 26179 | ||
| Created: | 2013-12-26 23:00:50 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2013-12-26 23:00:50 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 49610. | E. N. Kjellesvig-Waering. 1986. A restudy of the fossil Scorpionida of the world. Palaeontographica Americana 55:1-287 [M. Clapham/M. Clapham] |
Secondary references:
| 67446 | R. H. Denison. 1970. A revised classificiation of Pteraspididae with description of new forms from Wyoming. Fieldiana: Geology 20:1-41 [P. Wagner/P. Wagner] | |
| 67445 | D. K. Elliot and H. G. Johnson. 1997. Use of vertebrates to solve biostratigraphic problems: Examples from the Lower and Middle Devonian of western North America. In G. Klapper, M. Murphy, J. A. Talent (eds.), Paleozoic Sequence Stratigraphy, Biostratigraphy, and Biogeography: Studies in Honor of J. Granville ("Jess") Johnson 321:179-188 [P. Wagner/P. Wagner] | |
| 86170 | J.C. Lamsdell and D.A. Legg. 2010. An isolated pterygotid ramus (Chelicerata: Eurypterida) from the Devonian Beartooth Butte Formation, Wyoming. Journal of Paleontology 6:1206-1208 [R. Plotnick/R. Plotnick] | |
| 86889 | O. E. Tetlie. 2007. Like father, like son? Not amongst the eurypterids (Chelicerata) from Beartooth Butte, Wyoming . Journal of Paleontology 81:1423-1421 [R. Plotnick/R. Plotnick] |