Gunma Triceratops site (Cretaceous of the United States)

Where: Harding County, South Dakota (45.8° N, 103.9° W: paleocoordinates 52.1° N, 77.5° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Hell Creek Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

• "bite marks were seen on some ribs and the left coracoid"

Collected by M. Triebold in 1992

Collection methods: quarrying, surface (float), surface (in situ), mechanical,

Primary reference: S.-i. Fujiwara and Y. Takakuwa. 2011. A sub-adult growth stage indicated in the degree of suture co-ossification in Triceratops. Bulletin of the Gunma Museum of Natural History 15:1-17 [M. Carrano/M. Carrano/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 124934: authorized by Matthew Carrano, entered by Matthew Carrano on 29.02.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Crocodylia -
Crocodylia indet. Owen 1842 crocodilian
teeth
 Ornithischia - Ceratopsidae
Triceratops sp. Marsh 1889 ceratopsid
GMNH-PV 124
 Theropoda -
Theropoda indet. Marsh 1881 theropod
teeth