Collection 41155, Grassy Spring Mb., Pioche Shale, NV - Eddy and McCollum 1998 (Cambrian of the United States)

Where: Lincoln County, Nevada (37.9° N, 114.6° W: paleocoordinates 3.2° 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: lithified packstone

• bioclastics (interpretted from the stratigraphic columns of figure 3).

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 9474: authorized by Mark Patzkowsky, entered by Phil Borkow on 13.11.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

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Trilobita
 Corynexochida - Zacanthoididae
Delamarella brevispinaspis n. gen. n. sp., Ursinella major n. gen. n. sp., Albertellina aspinosa
Delamarella brevispinaspis n. gen. n. sp. Eddy and McCollum 1998 trilobite
7 cranidia, 2 pygidia
Ursinella major n. gen. n. sp. Eddy and McCollum 1998 trilobite
1 pygidium
Albertellina aspinosa Palmer and Halley 1979 trilobite
7 cranidia, 17 pygidia
 Ptychopariida -
Mexicella granulata n. sp.
Mexicella granulata n. sp. Eddy and McCollum 1998 trilobite
19 cranidia
 Ptychopariida - Ptychopariidae
Panacus palmeri n. gen. n. sp., Volocephalina variosa n. sp., Nyella immoderata
Panacus palmeri n. gen. n. sp. Eddy and McCollum 1998 trilobite
10 cranidia
Volocephalina variosa n. sp. Eddy and McCollum 1998 trilobite
26 cranidia
Nyella immoderata Palmer and Halley 1979 trilobite
4 cranidia