Landslide Butte Field Area (MOR TM-060) (Cretaceous of the United States)

Where: Glacier County, Montana (49.0° N, 112.6° W: paleocoordinates 56.6° N, 78.5° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Upper Member (Two Medicine Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• "upper lithofacies suite", approx. 20 m below Bearpaw Fm.

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; siltstone

Size class: macrofossils

Collected by S. Hofsteader, J. Horner & C. Ancell in 1987

Collection methods: quarrying, mechanical,

Primary reference: S. D. Sampson. 1994. Two new horned dinosaurs (Ornithischia: Ceratopsidae) from the Upper Cretaceous Two Medicine Formation, Montana, USA. Journal of Vertebrate Paleontology 14(3, suppl.):44A [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 52435: authorized by Matthew Carrano, entered by Matthew Carrano on 05.08.2005, edited by Graeme Lloyd

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Ornithischia - Ceratopsidae
Achelousaurus horneri n. gen. n. sp., Stellasaurus ancellae n. gen. n. sp.
Achelousaurus horneri n. gen. n. sp. Sampson 1994 ceratopsid
MOR 485
Stellasaurus ancellae n. gen. n. sp. Wilson et al. 2020 ceratopsid
MOR 492