WP-1, Westgard Pass [Upper Poleta Fm] (Cambrian of the United States)

Where: Inyo County, California (37.3° N, 118.2° W: paleocoordinates 0.1° N, 97.5° W)

• coordinate based on nearby landmark

When: Nevadella - Holmia trilobite zone, Upper Member (Poleta Formation), Dyeran (516.0 - 513.0 Ma)

• PMNG: Nevadella biozone ranges 518.4 - 515.4 Ma according to Gradstein, et al. (2020).

• member-level stratigraphic resolution

Environment/lithology: offshore; lithified, calcareous mudstone

Size classes: macrofossils, mesofossils

Preservation: mold/impression

Reposited in the LACM, TMM, UCMP, USNM

Collection methods: quarrying, surface (float), surface (in situ)

Primary reference: J. Sprinkle. 1973. Morphology and evolution of blastozoan echinoderms. Harvard University Museum of Comparative Zoology, Special Publication 1-283 [G. Webster/G. Webster/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 90625: authorized by Alex Lin, entered by Alex Lin on 11.08.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

Eocrinoidea
  -
Eocrinoidea indet. Jaekel 1918
Helicoplacoidea
  - Helicoplacidae
Helicoplacus gilberti Durham and Caster 1963
Waucobella nelsoni Durham 1967
Polyplacus kilmeri Durham 1967