Seven Mile Creek (AMNH): Late/Upper Maastrichtian, Wyoming
collected by B. Brown 1900, 1909
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
- Ankylosauridae
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Dynamosaurus imperiosus
Osborn 1905
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1 specimen | |||||||||
AMNH 5866, dermal plates, originally part of holotype | ||||||||||
= Ankylosaurus magniventris
Brown 1908
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Carpenter 2004 | |||||||||
Reptilia
- Ceratopsidae
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Triceratops sp.
Marsh 1889
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Osborn 1906 | 1 specimen | ||||||||
frill | ||||||||||
Reptilia
- Hadrosauridae
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Anatosaurus annectens
(Marsh 1892)
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Lull and Wright 1942 | 1 specimen | ||||||||
recombined as Edmontosaurus annectens | ||||||||||
AMNH 5863 | ||||||||||
Reptilia
- Iguanodontidae
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Iguanodontidae indet.
Bonaparte 1850
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Osborn 1906 | 1 specimen | ||||||||
jaw | ||||||||||
Reptilia
- Tyrannosauridae
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Dynamosaurus imperiosus n. gen., n. sp.
Osborn 1905
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1 individual | |||||||||
synonym of Tyrannosaurus rex | ||||||||||
AMNH 5866/BMNH R7794; holotype | ||||||||||
Reptilia
- Baenidae
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Thescelus insiliens
Hay 1908
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Gaffney 1972 | 1 specimen | ||||||||
AMNH 1108 (Hay, 1908, pls. 24, 25), an almost complete shell | ||||||||||
Eubaena latifrons n. sp.
Hay 1908
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Hay 1908 | 1 specimen | ||||||||
recombined as Hayemys latifrons | ||||||||||
AMNH 6139 (holotype crushed skull) | ||||||||||
see common names |
Geography
Country: | United States | State/province: | Wyoming | County: | Niobrara |
Coordinates: | 43.4° North, 104.4° West (view map) | ||||
Paleocoordinates: | 49.9° North, 79.1° West | ||||
Basis of coordinate: | stated in text | ||||
Altitude: | 1213 meters | ||||
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 |
Stratigraphic resolution: | group of beds |
Lithology and environment
Primary lithology: | fine poorly lithified claystone |
Secondary lithology: | fine poorly lithified siltstone |
Includes fossils? | Y |
Includes fossils? | Y |
Lithology description: "soft, fine-grained claystones and siltstones" | |
Environment: | terrestrial indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Preservation of anatomical detail: | good |
Articulated whole bodies: | some |
Associated major elements: | some |
Disassociated major elements: | some |
Fragmentation: | occasional |
Collection methods and comments
Collection methods: | selective quarrying,mechanical,field collection | ||
Reason for describing collection: | taxonomic analysis | ||
Museum repositories: | AMNH | ||
Collectors: | B. Brown | Collection dates: | 1900, 1909 |
Collection method comments: 14 x 40 ft quarry |
Metadata
Also known as: | L&W locality 30, Locality 17 | ||
Database number: | 45878 | ||
Authorizer: | M. Carrano, R. Benson | Enterer: | M. Carrano, R. Benson |
Modifier: | M. Carrano | Research group: | vertebrate |
Created: | 2004-12-10 08:14:26 | Last modified: | 2022-06-08 16:07:23 |
Access level: | the public | Released: | 2004-12-10 08:14:26 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
9259. | H. F. Osborn. 1905. Tyrannosaurus and other Cretaceous carnivorous dinosaurs. Bulletin of the American Museum of Natural History 21(14):259-265 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
64040 | V. M. Arbour and P. J. Currie. 2016. Systematics, phylogeny and palaeobiogeography of the ankylosaurid dinosaurs. Journal of Systematic Palaeontology 14(5):385-444 [G. Lloyd/G. Lloyd/M. Carrano] | |
71136 | V. M. Arbour and J. C. Mallon. 2017. Unusual cranial and postcranial anatomy in the archetypal ankylosaur Ankylosaurus magniventris. Facets 2(2):764-794 [M. Carrano/M. Carrano] | |
17876 | ETE | B. H. Breithaupt, E. H. Southwell, and N. A. Matthews. 2006. Dynamosaurus imperiosus and the earliest discoveries of Tyrannosaurus rex in Wyoming and the West. In S. G. Lucas and R. M. Sullivan (eds.), Late Cretaceous Vertebrates from the Western Interior. New Mexico Museum of Natural History and Science Bulletin 35:257-258 [M. Carrano/M. Carrano] |
11822 | ETE | K. Carpenter. 2004. Redescription of Ankylosaurus magniventris Brown 1908 (Ankylosauridae) from the Upper Cretaceous of the Western Interior of North America. Canadian Journal of Earth Sciences 41:961-986 [M. Carrano/M. Carrano/M. Carrano] |
81845 | K. L. Derstler. 1994. Dinosaurs of the Lance Formation in eastern Wyoming. In G. E. Nelson (ed.), Wyoming Geological Association Forty-Fourth Annual Field Conference. Wyoming Geological Association Guidebook 44:127-146 [M. Carrano/M. Carrano] | |
704 | E. S. Gaffney. 1972. The systematics of the North American family Baenidae (Reptilia, Cryptodira). Bulletin of the American Museum of Natural History 147(5):245-312 [J. Alroy/M. Sommers/R. Benson] | |
51846 | W. K. Gregory. 1910. The Tyrannosaurus. The American Museum Journal 10:2-8 [M. Carrano/M. Carrano] | |
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] |
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] |
17477 | ETE | R. E. Molnar. 1991. The cranial morphology of Tyrannosaurus rex. Palaeontographica Abteilung A 217(4-6):137-176 [M. Carrano/M. Carrano] |
17198 | ETE | H. F. Osborn. 1906. Tyrannosaurus, Upper Cretaceous carnivorous dinosaur. (Second communication.). Bulletin of the American Museum of Natural History 22(16):281-296 [M. Carrano/M. Carrano] |
12386 | ETE | H. F. Osborn. 1912. Crania of Tyrannosaurus and Allosaurus. Memoirs of the American Museum of Natural History. New Series 1(1):1-30 [M. Carrano/M. Carrano/M. Carrano] |
13950 | ETE | J. H. Ostrom. 1965. Cretaceous vertebrate faunas of Wyoming. Wyoming Geological Association Guidebook 19:35-41 [M. Carrano/K. Maguire/M. Carrano] |