Hell Creek (AMNH general): Late/Upper Maastrichtian, Montana
collected by O. Hunter, B. Brown 1904, 1906
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Testudines
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Plastomenus costatus
Cope 1875
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1 specimen | |||||||||
| nomen dubium belonging to Pantrionychidae | ||||||||||
| AMNH 6131, some portions of a carapace and a plastron. It is not certainly known that the various bones belong to the same individual. | ||||||||||
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Reptilia
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Champsosaurus laramiensis n. sp.
Brown 1905
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Brown 1905 | 1 specimen | ||||||||
| AMNH 982 (holotype), nearly complete skull and skeleton | ||||||||||
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Champsosaurus ambulator n. sp.
Brown 1905
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Brown 1905 | 1 specimen | ||||||||
| AMNH 983 (holotype), skull and nearly complete skeleton | ||||||||||
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Reptilia
- Hadrosauridae
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Anatosaurus sp.
Lull and Wright 1942
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Lull and Wright 1942 | 1 specimen | ||||||||
| synonym of Edmontosaurus | ||||||||||
| AMNH 5888 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Montana | County: | Garfield |
| Coordinates: | 47.3° North, 108.2° West (view map) | ||||
| Paleocoordinates: | 54.4° North, 81.6° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | outcrop |
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: | Hell Creek | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: 'Laramie deposits' | |||||
Lithology and environment
| Primary lithology: | not reported |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection,survey of museum collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | AMNH | ||
| Collectors: | O. Hunter, B. Brown | Collection dates: | 1904, 1906 |
| Collection method comments: Found by Mr. Oscar Hunter in 1904 "and originally 'swapped' for a 'six-shooter' revolver" (Osborn 1909) then puchased in 1906 by Brown. | |||
Metadata
| Database number: | 131865 | ||
| Authorizer: | R. Benson, M. Carrano, A. Dunhill | Enterer: | R. Benson, M. Carrano, B. Allen |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2012-07-31 21:06:39 | Last modified: | 2014-07-17 09:23:21 |
| Access level: | the public | Released: | 2012-07-31 21:06:39 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 14442. | ETE | O. P. Hay. 1908. The fossil turtles of North America. Carnegie Institution of Washington Publication 75:1-568 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
| 14409 | ETE | B. Brown. 1905. The osteology of Champsosaurus Cope. American Museum of Natural History, Memoirs 9:1-264 [M. Carrano/M. Carrano/M. Carrano] |
| 12319 | ETE | R. S. Lull and N. E. Wright. 1942. Hadrosaurian dinosaurs of North America. Geological Society of America Special Paper 40:1-242 [M. Carrano/M. Carrano/M. Carrano] |
| 51977 | H. F. Osborn. 1909. The Upper Cretaceous iguanodont dinosaurs. Nature 81:160-162 [M. Carrano/M. Carrano] |