USNM 41999, Goldfield Hills (Cambrian of the United States)

Where: Esmeralda County, Nevada (37.6° N, 117.3° W: paleocoordinates 1.2° S, 93.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Amecephalus arrojosensis trilobite zone, Emigrant Formation, Delamaran (511.2 - 506.5 Ma)

• 9.5 to 15m above base of Emigrant Formation; Amecephalus arrojosensis Biozone

• group of beds-level stratigraphic resolution

Environment/lithology: offshore shelf; argillaceous, cherty/siliceous shale

• thinly bedded, dark argillites

Size class: macrofossils

Reposited in the USNM

Primary reference: F. A. Sundberg and L.B. McCollum. 2003. Early and Mid Cambrian Trilobites from the Outer-shelf Deposits of Nevada and California, USA. Palaeontology 46(5):945-986 [W. Kiessling/B. Brenneis]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 69480: authorized by Wolfgang Kiessling, entered by Benjamin Brenneis on 27.02.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Ptychopariida - Ptychopariidae
Onchocephalites claytonensis
Onchocephalites claytonensis Sundberg and McCollum 2003 trilobite
total of approximately 100 specimens (including paratypes) from 13 USNM Goldfield Hills loc.
 Ptychopariida -
Tonopahella goldfieldensis
Tonopahella goldfieldensis Sundberg and McCollum 2003 trilobite
total of 60 specimens (including paratypes) from 10 USNM Goldfield H. loc.
 Corynexochida - Oryctocephalidae
Oryctocephalus americanus
Oryctocephalus americanus Sundberg and McCollum 2003 trilobite
total of 8 cranidia and 1 pygidium from 6 USNM Goldfield Hills loc.