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 | |
Achelousaurus horneri n. gen. n. sp., Stellasaurus ancellae n. gen. n. sp.
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