Also known as A. longirostris type

Where: Alberta, Canada (51.8° N, 112.8° W: paleocoordinates 59.6° N, 78.5° W)

• coordinate stated in text

• local area-level geographic resolution

When: Horseshoe Canyon Formation (Edmonton Group), Late/Upper Campanian to Late/Upper Campanian (83.5 - 66.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; ferruginous, sandy claystone

Size class: macrofossils

Collected by G. Paterson & C. M. Sternberg in 1924

Collection methods: quarrying, mechanical,

• Sternberg describes a wider collection: "Besides the specimen here described and those collected by Brown, the writer is aware of two skulls and one skeleton which have been collected from this horizon, and two skeletons, too poorly preserved to collect, and numerous disarticulated bones were observed. Most of these specimens are probably referable to A. ornatus." All are included here except for those collected by Brown.

Primary reference: C. M. Sternberg. 1929. A new species of horned dinosaur from the Upper Cretaceous of Alberta. National Museum of Canada Bulletin 54:34-37 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 28548: authorized by Matthew Carrano, entered by Matthew Carrano on 19.02.2003

Creative Commons license: CC BY (attribution)