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
Polycotylus latippinus (Cope 1869)
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]