Collection 41171 [Grassy Spring Mbr, Pioche Shale] (Cambrian of the United States)

Where: Lincoln County, Nevada (37.9° N, 114.5° W: paleocoordinates 3.4° S, 93.6° W)

• outcrop-level geographic resolution

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

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

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified packstone

• bioclastics (interpretted from figure 4. stratigraphic sections).

Collection methods: Only trilobites from the Albertella highlandensis subbiozone were collected.

Primary reference: J. D. Eddy and L. B. McCollum. 1998. Early Middle Cambrian Albertella biozone trilobites of the Pioche Shale, southeastern Nevada. Journal of Paleontology 72(5):864-887 [M. Patzkowsky/P. Borkow/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 9435: authorized by Mark Patzkowsky, entered by Phil Borkow on 03.11.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Ptychopariida - Ptychopariidae
Volocephalina connexa, Plagiura minor
Volocephalina connexa Palmer and Halley 1979 trilobite
1cranidium
Plagiura minor Palmer and Halley 1979 trilobite
2 cranidia
 Ptychopariida -
Mexicella mexicana
Mexicella mexicana Lochman 1948 trilobite
25 cranidia
 Corynexochida - Zacanthoididae
Albertella highlandensis
Albertella highlandensis Eddy and McCollum 1998 trilobite
3 cranidia, 11 pygidia, 3 librigena, 2 hypostomes