Dark Canyon x78 (Cambrian of the United States)

Also known as DC x78

Where: Rapid City County, South Dakota (44.1° N, 103.2° W: paleocoordinates 12.2° S, 82.5° W)

• small collection-level geographic resolution

When: Aphelaspis zone, lower Member (Deadwood Formation), Steptoean (497.0 - 493.5 Ma)

Environment/lithology: transition zone or lower shoreface; limestone

Preservation: cast

Collection methods: bulk,

Primary reference: J. H. Stitt and P. J. Perfetta. 2000. Trilobites, Biostratigraphy, and Lithostratigraphy of the Crepicephalus and Aphelaspis zones, Lower Deadwood formation (Marjuman and Steptoean Stages, Upper Cambrian), Black Hills, South Dakota. Journal of Paleontology 74(2):199-223 [M. Patzkowsky/K. Straub/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 7378: authorized by Mark Patzkowsky, entered by Kyle Straub on 23.05.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Olenida - Aphelaspidae
 Ptychopariida - Lonchocephalidae
Glaphyraspis parva Walcott 1899 trilobite
 Corynexochida - Cheilocephalidae
Cheilocephalus brevilobus Walcott 1916 trilobite