USNM 42007, Goldfield Hills, Nevada (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 69495: 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, Syspacephalus variosus
Onchocephalites claytonensis Sundberg and McCollum 2003 trilobite
total of approximately 100 specimens (including paratypes) from 13 USNM Goldfield Hills loc.
Syspacephalus variosus Sundberg and McCollum 2003 trilobite
total of 39 specimens (icluding paratype) from loc. USNM 42005 and 42007
 Corynexochida - Dolichometopidae
Wenkchemnia sulcata
Wenkchemnia sulcata Rasetti 1951 trilobite
2 cranidia, 1 shield, 2 hypostomata and 1 librigena from loc. USNM 42005 and 42007