Collection 41172, 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 3.4° S, 93.6° W)

• outcrop-level geographic resolution

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

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified packstone

• bioclastics (interpretted from figure 3. stratigraphic columns)

Size classes: macrofossils, mesofossils

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 9412: 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
 Corynexochida - Zacanthoididae
Albertellina aspinosa, Delamarella brevispinaspis n. gen. n. sp.
Albertellina aspinosa Palmer and Halley 1979 trilobite
12 cranidia, 8 pygidia
Delamarella brevispinaspis n. gen. n. sp. Eddy and McCollum 1998 trilobite
2 cranidia, 3 pygidia
 Ptychopariida - Ptychopariidae
Volocephalina variosa n. sp., Panacus palmeri n. gen. n. sp.
Volocephalina variosa n. sp. Eddy and McCollum 1998 trilobite
6 cranidia
Panacus palmeri n. gen. n. sp. Eddy and McCollum 1998 trilobite
2 cranidia
 Ptychopariida -
Mexicella granulata n. sp.
Mexicella granulata n. sp. Eddy and McCollum 1998 trilobite
15 cranidia