Also known as Dystrophaeus type

Where: San Juan County, Utah (38.1° N, 109.3° W: paleocoordinates 33.2° N, 54.6° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Tidwell Member (Morrison Formation), Oxfordian (161.2 - 155.7 Ma)

• within 1 m of lower boundary between Morrison and Wanakah Formations. Bottom of Tidwell Member, which here is within Morrison = Summerville Fm. Earlier papers often cite this as the McElmo Formation

• bed-level stratigraphic resolution

Environment/lithology: crevasse splay; sandstone

Size class: macrofossils

Collected by R. S. Newberry in 1859-1989; reposited in the UNSM

Collection methods: quarrying, mechanical,

• Site revisited in 1989 and more of original specimen found and excavated. Originally discovered by R. S. Newberry as part of the Macomb Expedition in 1859.

Primary reference: E. D. Cope. 1877. On a dinosaurian from the Trias of Utah. Proceedings of the American Philosophical Society 16:579-584 [M. Carrano/M. Carrano/M. Carrano] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 28360: authorized by Matt Carrano, entered by Matt Carrano on 10.02.2003

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)