YPM A673, NNE of Green Grass: Late Maastrichtian, South Dakota
collected by K.A. Waage 1959
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Octobrachia
- Actinosepiidae
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Actinosepia canadensis
Whiteaves 1897
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= Actinosepia landmani n. sp.
Larson 2010
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Larson 2010 | ||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | South Dakota | County: | Dewey |
| Coordinates: | 45.2° North, 101.2° West (view map) | ||||
| Paleocoordinates: | 50.9° North, 74.9° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| Key time interval: | Late Maastrichtian | Ammonoid zone: | Hoploscaphites nicolletii |
| Age range of interval: | 72.1 - 66 m.y. ago |
Stratigraphy
| Formation: | Fox Hills | Member: | Trail City | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Upper nicolletii Assemblage Zone (UNAZ), 8-10 ft below POAZ | |||||
Lithology and environment
| Primary lithology: | concretionary poorly lithified sandstone |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | YPM | ||
| Collectors: | K.A. Waage | Collection dates: | 1959 |
Metadata
| Database number: | 212987 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2020-08-23 16:52:01 | Last modified: | 2020-08-23 16:52:01 |
| Access level: | the public | Released: | 2020-08-23 16:52:01 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 73531. | K. M. Waage. 1965. The Late Cretaceous coleoid cephalopod Actinosepia canadensis Whiteaves. Postilla 94:1-31 [M. Clapham/M. Clapham] |
Secondary references:
| 73530 | N. L. Larson. 2010. Fossil coleoids from the Late Cretaceous (Campanian & Maastrichtian) of the Western Interior. Ferrantia 59:78-113 [M. Clapham/M. Clapham] |