Wallace Ranch: Early/Lower Campanian - Middle Campanian, South Dakota
collected by Univ. Nebraska 1966
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
- Hesperornithiformes
|
||||||||||
Hesperornis cf. regalis
Marsh 1872
|
1 individual | |||||||||
"slightly smaller...but agrees with that species in most other respects" | ||||||||||
Reptilia
- Plesiosauria
- Polycotylidae
|
||||||||||
Polycotylidae indet.
Williston 1908
|
O'Keefe 2008 | 1 individual | ||||||||
UNSM 55810 (juvenile skeleton; reported as UNSM 44810 by Adams [1997]) | ||||||||||
Dolichorhynchops osborni
Williston 1902
|
O'Keefe 2008 | 1 individual | ||||||||
UNSM 50133 (skull; reported as USNM 50144 by Adams [1997]) | ||||||||||
Trinacromerum bonneri
Adams 1997
|
Adams 1997 | 1 individual | ||||||||
KUMNH 40001 (holotype: skull, lower jaws, first three cervical vertebrae (articulated), pubes and ischia, left humerus and femur, vertebrae and ribs); | ||||||||||
= Martinectes bonneri
Adams 1997
|
Clark et al. 2024 | |||||||||
see common names |
Geography
Country: | United States | State/province: | South Dakota | County: | Fall River |
Coordinates: | 43.0° North, 103.3° West (view map) | ||||
Paleocoordinates: | 48.9° North, 71.5° West | ||||
Basis of coordinate: | stated in text | ||||
Geographic resolution: | local area |
Time
Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
Stage: | Campanian | 10 m.y. bin: | Cretaceous 7 |
Key time interval: | Early/Lower Campanian - Middle Campanian | Ammonoid zone: | Baculites sp. (smooth) - Baculites perplexus |
Age range of interval: | 83.50000 - 70.60000 m.y. ago |
Stratigraphy
Geological group: | Montana | Formation: | Pierre Shale | Member: | Sharon Springs |
Stratigraphic resolution: | formation | ||||
Stratigraphy comments: 10 ft below Ardmore Bentonite
The Sharon Springs Member spans Baculites sp. (smooth) - Baculites perplexus in South Dakota |
Lithology and environment
Primary lithology: | not reported |
Environment: | marine indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Preservation of anatomical detail: | good |
Associated major elements: | all |
Fragmentation: | occasional |
Spatial resolution: | parautochthonous |
Collection methods and comments
Collection methods: | field collection | ||
Reason for describing collection: | taxonomic analysis | ||
Museum repositories: | UNSM | ||
Collectors: | Univ. Nebraska | Collection dates: | 1966 |
Metadata
Also known as: | T. bonneri paratype | ||
Database number: | 77316 | ||
Authorizer: | M. Carrano, E. Vlachos, R. Benson | Enterer: | M. Carrano, F. Aspromonte, R. Benson |
Modifier: | P. Wagner | Research group: | vertebrate |
Created: | 2008-01-08 15:10:55 | Last modified: | 2021-02-12 17:43:12 |
Access level: | the public | Released: | 2008-01-08 15:10:55 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
36973. | ETE | L. D. Martin and J. T. Tate, Jr. 1967. A Hesperornis from the Pierre Shale. Proceedings of the 79th Annual Meeting, Nebraska Academy of Sciences 40 [M. Carrano/M. Carrano] |
Secondary references:
26171 | ETE | D. A. Adams. 1997. Trinacromerum bonneri, new species, last and fastest pliosaur of the Western Interior Seaway. Texas Journal of Science 49(3):179-198 [M. Carrano/M. Carrano] |
87231 | R. O. Clark, F. R. O'Keefe, and S. E. Slack. 2024. A new genus of small polycotylid plesiosaur from the Upper Cretaceous of the Western Interior Seaway and a clarification of the genus Dolichorhynchops. Cretaceous Research 157:105812:1-35 [E. Vlachos/F. Aspromonte/P. Mannion] | |
48141 | J. R. Gill, W. A. Cobban, and L. G. Schultz. 1972. Stratigraphy and Composition of the Sharon Springs Member of the Pierre Shale in Western Kansas. Geological SUrvey Professional Paper 728:1-50 [R. Benson/R. Benson] | |
33004 | F. R. O'Keefe. 2008. Cranial anatomy and taxonomy of Dolichorhynchops bonneri new combination, a polycotylid (Sauropteryga: Plesiosauria) from the Pierre Shale of Wyoming and South Dakota. Journal of Vertebrate Paleontology 28(3):664-676 [M. Carrano/H. Street] |