Steptoean Stage, Duck Creek, Nevada - Palmer 1999 (Cambrian to of the United States)

Where: Nevada (39.4° N, 114.8° W: paleocoordinates 4.1° S, 88.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Dunderberg Formation, Steptoean to Steptoean (497.0 - 485.4 Ma)

• formation-level stratigraphic resolution

Environment/lithology: lithified shale and lithified limestone

Collection methods: Collection focuses on the identification of trilobites.

Primary reference: A. R. Palmer. 1999. Stratotype boundary of the Steptoean Stage, McGill Nevada. Laurentai 99: V field conference of the Cambrian Stage Subdivision Working Group, International Subcomission on Cambrian Stratigraphy 22-23 [M. Patzkowsky/P. Borkow]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 10506: authorized by Mark Patzkowsky, entered by Phil Borkow on 14.05.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

 Agnostida - Agnostidae
Homagnostus comptus n. sp., "Agnostus inexpectans" = Innitagnostus inexpectans
Homagnostus comptus n. sp. Palmer 1962
"Agnostus inexpectans" = Innitagnostus inexpectans Kobayashi 1938
 Agnostida -
Glyptagnostus reticulatus Angelin 1851
subspecies angeini
 Olenida - Aphelaspidae
Aphelaspis brachyphasis n. sp. Palmer 1962 trilobite
Aphelaspis buttsi Kobayashi 1936 trilobite
"Olenaspella separata n. sp." = Eugonocare (Olenaspella) separatum Palmer 1962 trilobite