Collection 41174, Grassy Spring Mb., Pioche Shale, NV - Eddy and McCollum 1998 (Cambrian of the United States)

Where: Lincoln County, Nevada (37.9° N, 114.4° W: paleocoordinates 3.3° S, 93.1° W)

• outcrop-level geographic resolution

When: Albertella Biozone zone, Grassy Spring Member (Pioche Shale Formation), Solvan (510.2 - 504.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified packstone

• bioclastics (interpretted from figure 3. stratigraphic sections)

Collection methods: Only trilobites from the Albertellina aspinosa 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 9414: authorized by Mark Patzkowsky, entered by Phil Borkow on 29.10.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Ptychopariida - Ptychopariidae
Panacus palmeri, Volocephalina variosa, "Nyella granosa" = Palmerara granosa, Nyella immoderata
Panacus palmeri Eddy and McCollum 1998 trilobite
6 cranidia
Volocephalina variosa Eddy and McCollum 1998 trilobite
5 cranidia
"Nyella granosa" = Palmerara granosa Resser 1939 trilobite
2 cranidia
Nyella immoderata Palmer and Halley 1979 trilobite
15 cranidia, 1 pygidia
 Ptychopariida -
Mexicella granulata
Mexicella granulata Eddy and McCollum 1998 trilobite
32 cranidia
 Corynexochida - Zacanthoididae
Ursinella major, Albertellina aspinosa
Ursinella major Eddy and McCollum 1998 trilobite
2 pygidia
Albertellina aspinosa Palmer and Halley 1979 trilobite
16 cranidia, 16 pygidia