Nopah Formation, Sample 955-CO, Member C (Cambrian of the United States)

Where: Nevada (39.0° N, 116.0° W: paleocoordinates 3.2° S, 88.4° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Dunderbergia trilobite zone, Dunderberg Shale C Member (Nopah Formation), Steptoean (501.0 - 485.4 Ma)

• Listed as upper half of Dunderbergia zone

• group of beds-level stratigraphic resolution

Environment/lithology: slope; poorly lithified shale and lithified, shelly/skeletal limestone

• Fossils only in limestones
• Dominantly shale interbedded with fossiliferous limestone

Size classes: macrofossils, microfossils

Primary reference: A. R. Palmer. 1960. Trilobites of the Upper Cambrian Dunderberg Shale, Eureka District, Nevada. United States Geological Survey Professional Paper 334-C:53-107 [P. Novack-Gottshall/P. Hearn/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 75273: authorized by Phil Novack-Gottshall, entered by Paul Hearn on 03.10.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• Upper half of Dunderbergia zone age; Trilobite systematics with some phosphatic inarticulates mentioned; however, this is probably an accurate portrayal of full fauna
 Acrotretida - Acrotretidae
Linnarssonella sp. Walcott 1902
 Ptychopariida - Elviniidae
 Olenida - Dokimokephalidae
Pseudosaratogia abnormis Palmer 1960 trilobite
 Olenida - Pterocephaliidae
Housia ovata Palmer 1960 trilobite
Parahousia constricta Palmer 1960 trilobite
Pterocephalia sanctisabae Roemer 1849 trilobite
"Sigmocheilus serratus" = Sigmocheilus flabellifer Hall and Whitfield 1877 trilobite