3 mi south of Solomon: Middle Turonian, Kansas
collected by Mr Joseph Savage 1873
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Reptilia
- Plesiosauria
- Polycotylidae
|
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Trinacromerum anonymum
Williston 1903
|
Williston 1908 | 1 individual | ||||||||
| synonym of Trinacromerum bentonianum | ||||||||||
| YPM 1129 (partial skeleton and skull) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Kansas | County: | Osborne County |
| Coordinates: | 38.9° North, 97.4° West (view map) | ||||
| Paleocoordinates: | 39.2° North, 62.6° West | ||||
| Basis of coordinate: | estimated from map |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Turonian | 10 m.y. bin: | Cretaceous 6 |
| Key time interval: | Middle Turonian | ||
| Age range of interval: | 93.90000 - 89.80000 m.y. ago |
Stratigraphy
| Geological group: | Colorado | Formation: | Carlile Shale | Member: | Fairport |
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: "Williston (1908) also states that 'the type specimen collected by the late Professor Mudge [is] from nearly the same locality and doubtless the same horizon in the Upper Benton'. From this information we assume that the specimen was collected from the Fairport Chalk in Osborne County. This is also one reference in which Williston refers specifically to the Upper Benton (i.e. - Fairport Chalk and perhaps Blue Hill Shale; presumably the "Lower Benton" corresponded to the Graneros Shale and Greenhorn Limestone). If our (and Williston's) assumptions are correct, the specimen is early Middle Turonian in age" (Schumacher & Everhart 2005, p. 48). | |||||
Lithology and environment
| Primary lithology: | not reported |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Temporal resolution: | snapshot |
Collection methods and comments
| Collection methods: | selective quarrying,survey of museum collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Collectors: | Mr Joseph Savage | Collection dates: | 1873 |
| Collection method comments: YPM collection | |||
Metadata
| Also known as: | YPM 1129, T. anonymum referred locality | ||
| Database number: | 117815 | ||
| Authorizer: | R. Benson | Enterer: | R. Benson |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2011-09-27 02:19:37 | Last modified: | 2012-01-31 16:23:11 |
| Access level: | the public | Released: | 2011-09-27 02:19:37 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 37870. | B. A. Schumacher and M. J. Everhart. 2005. A stratigraphic and taxonomic review of plesiosaurs from the old "Fort Benton Group" of central Kansas: a new assessment of old records. Paludicola 5(2):33-54 [R. Benson/R. Benson/R. Butler] |
Secondary references:
| 34117 | K. Carpenter. 1996. A review of short-necked plesiosaurs of the Western Interior, North America. Neues Jahrbuch fur Geologie und Palaontologie, Abhandlungen 201(2):259-287 [M. Carrano/H. Street] | |
| 37876 | S. W. Williston. 1908. North American plesiosaurs Trinacromerum. Journal of Geology 16(8):715-736 [R. Benson/R. Benson] |