41442, Seven Oaks Spring Sect., Comet Shale Mb., NV - Sundberg and McCollum 2000 (Cambrian of the United States)

Where: Lincoln County, Nevada (37.6° N, 114.8° W: paleocoordinates 3.0° S, 93.4° W)

• outcrop-level geographic resolution

When: Eokochaspis nodosa zone, Comet Shale Member (Pioche Shale Formation), Solvan (510.2 - 504.5 Ma)

• Basal 70cm of section.

• bed-level stratigraphic resolution

Environment/lithology: lithified, silty limestone

• silty ribbon limestone

Preservation: replaced with silica

Collection methods: Only trilobites are included in the collection

Primary reference: F. A. Sundberg and L. B. McCollum. 2000. Ptychoparid trilobites of the Lower-Middle Cambrian boundary interval, Pioche Shale, southeastern Nevada. Journal of Paleontology 74(4):604-630 [M. Patzkowsky/P. Borkow/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 9252: authorized by Mark Patzkowsky, entered by Phil Borkow on 10.10.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• The taxonomic list does not include inarticulate brachiopods, hyolithids, spicules of Protospongia, and lightly scleritized forms such as Anomalocaris, Canadaspis, and Tuzoia which may be present in the biozone but not necessarily collected.
Show authors, comments, and common names
Trilobita
 Ptychopariida -
Eokochaspis nodosa
Eokochaspis nodosa Sundberg and McCollum 2000 trilobite