Dark Canyon 71 [Deadwood Fm] (Cambrian of the United States)

Also known as DC 71

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: Crepicephalus trilobite zone, lower Member (Deadwood Formation), Dresbachian (497.0 - 485.4 Ma)

• AGE: Dresbachian; refined by A. Hendy (6/2009) on the basis of biostratigraphic data (= Crepicephalus zone).

Environment/lithology: transition zone or lower shoreface; limestone and sandstone

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 7375: authorized by Mark Patzkowsky, entered by Kyle Straub on 23.05.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Ptychopariida - Kingstoniidae
Blountia sp. Walcott 1916 trilobite
 Ptychopariida - Tricrepicephalidae
 Ptychopariida - Lonchocephalidae
Terranovella dorsalis Hall 1863 trilobite
 Ptychopariida - Crepicephalidae
Coosina ariston Walcott 1916 trilobite
Coosia alethes Walcott 1916 trilobite
 Ptychopariida - Marjumiidae
Coosella sp. Lochman 1936 trilobite
 Olenida - Asaphiscidae
Artiopoda
 Agnostida - Agnostidae
Hadragnostus modestus Lochman 1944
 Agnostida - Diplagnostidae