Also known as SF 55

Where: Clark County, Nevada (37.3° N, 115.8° W: paleocoordinates 6.9° S, 81.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Didymograptus murchisoni + Gymnograptus linnarssoni graptolite zone, Antelope Valley Formation (Pogonip Group), Whiterockian (470.0 - 457.3 Ma)

• Whiterockian; no formal stage. Questionably assigned to Zone N (Anomalorthis). Zhan et al. (2013) note that Dactylogonia vespertina is from the Didymograptus murchisoni or Gymnograptus linnarssoni zones

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified limestone

Size class: macrofossils

Preservation: replaced with silica

Collected by J. Ross, Jr.; reposited in the USNM

Collection methods: bulk,

Primary reference: R. J., J.r. Ross. 1970. Ordovician Brachiopods, Trilobites, and Stratigraphy in Eastern and Central Nevada. United States Geological Survey Professional Paper 639:1-99 [S. Finnegan/S. Finnegan/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 104406: authorized by Seth Finnegan, entered by Seth Finnegan on 07.02.2011

Creative Commons license: CC BY (attribution)