Pioche Shale, Bed 12 (Cambrian of the United States)

Where: White Pine County, Nevada (40.0° N, 115.0° W: paleocoordinates 3.2° S, 91.5° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Albertella trilobite zone, Upper Member (Pioche Shale Formation), Delamaran (511.2 - 506.5 Ma)

• Listed as Lower to Middle Cambrian, Albertella

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, fine-grained, black, gray limestone and poorly lithified shale

• Thin to Medium beds of medium to dark gray and black, finely crystalline limestone interbeds of shale unit

Size classes: macrofossils, mesofossils

Collected by W.H. Fritz; reposited in the USNM

• Trilobites only; articulates observed but not collected. Collection 12, 668 feet above base of formation

Primary reference: W. H. Fritz. 1968. Lower and early Middle Cambrian trilobites from the Pioche Shale, East-Central Nevada, U.S.A. Palaeontology 11:36-43 [P. Novack-Gottshall/P. Hearn/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 155993: authorized by Melanie Hopkins, entered by Melanie Hopkins on 06.05.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Ptychopariida - Alokistocaridae
Chancia venusta Resser 1939 trilobite
Alokistocare alta Fritz 1968 trilobite
 Ptychopariida - Ptychopariidae
"Caborcella granosa" = Palmerara granosa
"Caborcella granosa" = Palmerara granosa Resser 1939 trilobite
 Corynexochida - Zacanthoididae
Albertelloides mischi n. gen. n. sp. Fritz 1968 trilobite
Albertella judithi Fritz 1968 trilobite
 Corynexochida - Dolichometopidae
Poliella leipalox Fritz 1968 trilobite