Dunderberg Shale. Nopah Formation; Ruby Range, Eureka, McGill (all NV), and Fish Springs (UT) (Cambrian of the United States)

Where: Nevada and Utah (40.0° N, 115.0° W: paleocoordinates 3.9° S, 87.4° W)

When: Dunderberg Shale Member (Nopah Formation), Steptoean (497.0 - 493.5 Ma)

• Lower and middle Dunderbergia zone age (probably members A and B); Primarily trilobites listed; 20 samples from several Great Basin localities

Environment/lithology: offshore shelf; lithified, calcareous wackestone

• Lime wackestones and packstones

Size classes: macrofossils, mesofossils

Primary reference: D. J. McBride. 1976. Outer shelf communities and trophic groups in the Upper Cambrian of the Great Basin. Brigham Young University Geology Studies 23(2):139-152 [P. Novack-Gottshall/P. Hearn/J. Ju]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 74910: authorized by Phil Novack-Gottshall, entered by Paul Hearn on 05.09.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Helcionelloida
 Helcionellida - Pelagiellidae
Pelagiella sp.
Pelagiella sp. Matthew 1895
Lingulata
 Lingulida -
Lingulida indet.
Lingulida indet. Waagen 1885
 Acrotretida -
Acrotretida indet.
Trilobita
 Corynexochida - Cheilocephalidae
Cheilocephalus brachyops
Cheilocephalus brachyops Palmer 1965 trilobite
 Ptychopariida - Phylacteridae
Aphelotoxon sp.
Aphelotoxon sp. Palmer 1965 trilobite
 Ptychopariida - Elviniidae
Dytremacephalus granulosus, Dytremacephalus asperaxis, Elburgia granulosa, Dunderbergia anyta, Dunderbergia varigranula, Dunderbergia nitida, Dunderbergia polybothra, Dunderbergia bigranulosa
Dytremacephalus granulosus Palmer 1954 trilobite
Dytremacephalus asperaxis Palmer 1965 trilobite
Dunderbergia polybothra Palmer 1960 trilobite
Dunderbergia bigranulosa Palmer 1960 trilobite
 Olenida - Pterocephaliidae
Prehousia diverta, Cernuolimbus granulosus, Sigmocheilus notha, Pterocephalia concava, Pterocephalia punctata
Prehousia diverta Palmer 1965 trilobite
Cernuolimbus granulosus Palmer 1965 trilobite
Pterocephalia concava Palmer 1960 trilobite
Pterocephalia punctata Palmer 1965 trilobite
 Olenida - Olenidae
"Simulolenus wilsoni" = Olenus
"Simulolenus wilsoni" = Olenus trilobite
 Olenida - Aphelaspidae
Erixanium sp.
Erixanium sp. Opik 1963 trilobite
Artiopoda
 Agnostida - Agnostidae
Homagnostus sp.
Homagnostus sp. Howell 1935
 Agnostida - Diplagnostidae
Pseudagnostus communis
Pseudagnostus communis Hall and Whitfield 1877