Stephen Fm. (Cambrian of Canada)

Where: Alberta-British Columbia, Canada (52.8° N, 119.3° W)

• Paleocoordinates: 39.6° N, 106.3° W (Wright 2013)

• coordinate based on political unit

• basin-level geographic resolution

When: Bathyuriscus - Elrathina zone, Stephen Formation, Merioneth (497.0 - 485.4 Ma)

• "lower Bathyuriscus-Elrathina zone"

Environment/lithology: marine; black, gray limestone and shale

• "thin bedded, black-gray ls and sh. outer detrital belt (BA4?) pre-orogenic geosyncline."

Size class: macrofossils

Primary reference: F. Rasetti. 1951. Middle Cambrian stratigraphy and faunas of the Canadian Rocky Mountains. Smithsonian Miscellaneous Collections 116(5):1-277 [M. Uhen/J. Ju]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 213: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC0 (CC0)

Taxonomic list

• "Rasetti, 1951." [mostly trilobites and 2 brachs]
Show authors, comments, and common names
Trilobita
 Corynexochida - Oryctocephalidae
Tonkinella sp.
Tonkinella sp. Mansuy 1916 trilobite
 Corynexochida - Dorypygidae
Kootenia sp., Olenoides sp.
Kootenia sp. Walcott 1899 trilobite
Olenoides sp. Meek 1877 trilobite
 Corynexochida - Zacanthoididae
Zacanthoides sp.
Zacanthoides sp. Walcott 1888 trilobite
 Corynexochida - Dolichometopidae
Bathyuriscus sp., ? Athabaskia sp.
Bathyuriscus sp. Meek 1873 trilobite
? Athabaskia sp. Raymond 1928 trilobite
originally entered as "? Athabaskia sp."
 Ptychopariida - Alokistocaridae
Chancia sp., Alokistocare sp.
Chancia sp. Walcott 1924 trilobite
Alokistocare sp. Lorenz 1906 trilobite
 Ptychopariida - Solenopleuridae
Solenopleurella sp.
Solenopleurella sp. Poulson 1927 trilobite
 Ptychopariida - Ptychopariidae
Pachyaspis sp., "Elrathina sp." = Ptychoparella
Pachyaspis sp. Resser 1938 trilobite
"Elrathina sp." = Ptychoparella Poulson 1927 trilobite
Artiopoda
 Agnostida - Peronopsidae
Peronopsis sp.
Peronopsis sp. Corda 1847
 Agnostida - Eodiscidae
Pagetia sp.
Pagetia sp. Walcott 1916
Paterinata
 Paterinida - Paterinidae
"Iphidella sp." = Micromitra, Paterina sp.
"Iphidella sp." = Micromitra Meek 1873
Paterina sp. Beecher 1891