Where: Las Vegas County, Nevada (36.7° N, 115.4° W: paleocoordinates 7.4° S, 82.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Anomalorthis brachiopod zone, Upper Member (Antelope Valley Formation), Whiterockian (470.0 - 457.3 Ma)

• Zone N (Anomalorthis); Histiodella sinuosa conodont zone

• formation-level stratigraphic resolution

Environment/lithology: limestone

Size class: macrofossils

Preservation: original silica

Reposited in the USNM

Primary reference: E. Kirk. 1930. Mitrospira, a new Ordovician gasteropod genus. Proceedings of the United States National Museum 76(22):1-6 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 156585: authorized by Pete Wagner, entered by Pete Wagner on 25.05.2014

Creative Commons license: CC BY (attribution)