Middle Fork, Dry Creek: Late/Upper Maastrichtian, Wyoming
collected by C. E. Beecher 1889
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Reptilia
- Ceratopsidae
|
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Triceratops serratus n. sp.
Marsh 1890
|
1 individual | |||||||||
| synonym of Triceratops horridus | ||||||||||
| YPM 1823 (= Sk. 4) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Wyoming | County: | Niobrara |
| Coordinates: | 43.1° North, 104.6° West (view map) | ||||
| Paleocoordinates: | 49.6° North, 79.5° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| Key time interval: | Late/Upper Maastrichtian | ||
| Age range of interval: | 72.10000 - 66.00000 m.y. ago |
Stratigraphy
| Formation: | Lance | ||||
| Local section: | Lull Lance Creek | Local bed: | 18 | ||
| Local order: | top to bottom | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: base of sandstone layer about 20 feet above bottom of draw, probably slightly higher than T. horridus type level | |||||
Lithology and environment
| Primary lithology: | concretionary lithified calcareous sandstone |
| Includes fossils? | Y |
| Lithology description: "hard calcareous sandstone concretion" | |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body,concretion |
| Degree of concentration: | dispersed |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
| Associated major elements: | all |
| Temporal resolution: | snapshot |
Collection methods and comments
| Collection methods: | selective quarrying,mechanical,field collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | YPM | ||
| Collectors: | C. E. Beecher | Collection dates: | 1889 |
Metadata
| Also known as: | T. serratus type, Lance Creek, Hatcher Sk. 4 | ||
| Database number: | 46126 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2005-01-04 06:57:28 | Last modified: | 2023-07-20 15:07:41 |
| Access level: | the public | Released: | 2005-01-04 06:57:28 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 12304. | ETE | J. B. Hatcher, O. C. Marsh, and R. S. Lull. 1907. The Ceratopsia. Monographs of the United States Geological Survey 49:1-198 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
| 14177 | ETE | R. S. Lull. 1915. The mammals and horned dinosaurs of the Lance Formation of Niobrara County, Wyoming. The American Journal of Science, series 4 40(238):319-348 [M. Carrano/M. Carrano/M. Carrano] |
| 12314 | ETE | R. S. Lull. 1933. A revision of the Ceratopsia or horned dinosaurs. Memoirs of the Peabody Museum of Natural History 3(3):1-175 [M. Carrano/M. Carrano/M. Carrano] |
| 55599 | J. H. Ostrom and P. Wellnhofer. 1986. The Munich specimen of Triceratops with a revision of the genus. Zitteliana 14:111-158 [M. Carrano/M. Carrano] | |
| 13602 | ETE | J. H. Ostrom and P. Wellnhofer. 1990. Triceratops: an example of flawed systematics. In K. Carpenter and P. J. Currie (eds.), Dinosaur Systematics: Perspectives and Approaches, Cambridge University Press, Cambridge 245-254 [M. Carrano/M. Carrano/M. Carrano] |