USNM 44121, Split Mountain East Section (Cambrian of the United States)

Where: Esmeralda County, Nevada (37.8° N, 117.4° W)

• Paleocoordinates: 33.0° N, 136.8° W (Wright 2013)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Pentagnostus praecurrens trilobite zone, Emigrant Formation, Templetonian (508.0 - 504.5 Ma)

• Topazan

• group of beds-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified, silty limestone

• Thin to medium bedded, laminated, dark gray (N3), silty limestone with yellowish gray (5Y7/2) to grayish orange (10YR7/4) silty beds.

Size class: macrofossils

Reposited in the USNM

Primary reference: F. A. Sundberg. 2018. Trilobite biostratigraphy of the Cambrian 5 and Drumian stages, Series 3 (Laurentian Delamaran, Topazan, and Marjuman stages, Lincolnian Series) of the lower Emigrant Formation at Clayton Ridge, Esmeralda County, Nevada. Journal of Paleontology Memoir 92(S76):1-44 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 225158: authorized by Pete Wagner, entered by Pete Wagner on 27.04.2022

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Artiopoda
 Agnostida - Eodiscidae
Pagetia aspinosa n. sp.
Pagetia aspinosa n. sp. Sundberg 2018
 Agnostida - Peronopsidae
Pentagnostus brighamensis
Trilobita
 Corynexochida - Oryctocephalidae
Oryctocephalites "sp. indet."
Oryctocephalites "sp. indet." Resser 1939 trilobite
 Corynexochida - Zacanthoididae
Zacanthoides "sp. indet."
Zacanthoides "sp. indet." Walcott 1888 trilobite
 Corynexochida - Dolichometopidae
Glossopleura walcotti
Glossopleura walcotti Poulsen 1927 trilobite
 Ptychopariida - Ptychopariidae
Syspacephalus mccollumorum, Achlysopsis brighamensis
Syspacephalus mccollumorum Sundberg 2018 trilobite
Achlysopsis brighamensis Resser 1939 trilobite
 Ptychopariida - Alokistocaridae
Chancia maladensis
Chancia maladensis Resser 1939 trilobite