High School Sample 27 [Deadwood Fm] (Cambrian of the United States)

Also known as HS 27

Where: Whitewood Creek in Lead County, South Dakota (44.3° N, 103.8° W: paleocoordinates 11.8° S, 82.3° 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: shoreface; lithology not reported

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 7183: authorized by Mark Patzkowsky, entered by Kyle Straub on 10.05.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Artiopoda
 Agnostida -
 Agnostida - Agnostidae
Kormagnostus seclusus Walcott 1884
 Agnostida - Diplagnostidae
Trilobita
 Ptychopariida - Marjumiidae
Coosella sp. Lochman 1936 trilobite
Coosella onusta trilobite
 Ptychopariida - Crepicephalidae
Uncaspis unca trilobite
Uncaspis limbata trilobite
Coosina ariston Walcott 1916 trilobite
Coosia alethes Walcott 1916 trilobite
 Ptychopariida - Kingstoniidae
 Ptychopariida - Lonchocephalidae
 Ptychopariida - Tricrepicephalidae