Charles Bonner Ranch: Early/Lower Campanian - Middle Campanian, Kansas
collected by C. Bonner 1987
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
- Plesiosauria
- Polycotylidae
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Polycotylus latippinus
(Cope 1869)
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2 individuals | |||||||||
original and current combination Polycotylus latipinnis | ||||||||||
LACM 129639 consists of the largely articulated skeletal remains of two plesiosaur individuals, an adult and a juvenile displaying features at very early stages of development | ||||||||||
see common names |
Geography
Country: | United States | State/province: | Kansas | County: | Logan |
Coordinates: | 38.9° North, 101.2° West (view map) | ||||
Paleocoordinates: | 44.5° North, 71.1° West | ||||
Basis of coordinate: | based on political unit | ||||
Geographic resolution: | small collection |
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: | Bacculites sp. (weakly ribbed) to 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: | group of beds | ||||
Stratigraphy comments: "at the base of the Pierre Shale [Sharon Springs Member, Campanian]"
The SHaron Springs Member in Kansas ranges from Bacculites sp. (weakly ribbed) - Baculites perplexus biozones (Early-Middle Campanian) |
Lithology and environment
Primary lithology: | lithified not reported |
Lithology description: clearly lithified based on preservation of specimen | |
Environment: | marine indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Collection methods and comments
Collection methods: | selective quarrying,survey of museum collection | ||
Reason for describing collection: | paleoecologic analysis | ||
Museum repositories: | LACM | ||
Collectors: | C. Bonner | Collection dates: | 1987 |
Metadata
Database number: | 114240 | ||
Authorizer: | J. Alroy | Enterer: | J. Alroy |
Modifier: | R. Benson | Research group: | vertebrate |
Created: | 2011-08-12 16:56:02 | Last modified: | 2013-09-16 05:49:09 |
Access level: | the public | Released: | 2011-08-12 16:56:02 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
37079. | F. R. O'Keefe and L. M. Chiappe. 2011. Viviparity and K-selected life history in a Mesozoic marine Plesiosaur (Reptilia, Sauropterygia. Science 333(870):870-873 [J. Alroy/J. Alroy/R. Benson] |
Secondary references:
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] |