SW Richey Field, Deadwood Fm., Conaspis zone (Cambrian of the United States)

Where: Montana (47.4° N, 105.6° W: paleocoordinates 10.0° S, 79.4° W)

• coordinate based on political unit

When: Conaspis trilobite zone, Deadwood Formation, Franconian (497.0 - 485.4 Ma)

• "Franconian, Conaspis zone?"

Environment/lithology: lagoonal; lithology not reported

• "Sh, ls, and congl. muddy shelf lagoon, BA2, cratonic shelf"

Size class: macrofossils

Primary reference: C. Lochman-Balk and J. L. Wilson. 1967. Stratigraphy of Upper Cambrian-Lower Ordovician Subsurface Sequence in Williston Basin. AAPG Bulletin 51(6):883-917 [M. Uhen/J. Ju]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 246: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Lochman-Balk and Wilson 1967. biostrat. lists"
Show authors, comments, and common names
Trilobita
 Asaphida - Dikelocephalidae
Stigmacephalus sp.
Stigmacephalus sp. Resser 1937 trilobite
 Ptychopariida - Phylacteridae
Cliffia sp.
Cliffia sp. Wilson 1951 trilobite
 Ptychopariida - Elviniidae
Elvinia sp.
Elvinia sp. Walcott 1924 trilobite
 Ptychopariida - Kingstoniidae
"? Bynumiella sp." = Clelandia
"? Bynumiella sp." = Clelandia Cossman 1902 trilobite
originally entered as "? Bynumiella sp."
 Olenida - Pterocephaliidae
Camaraspis sp., Housia sp., Pterocephalia sp.
Camaraspis sp. Ulrich and Resser 1924 trilobite
Housia sp. Walcott 1916 trilobite
Pterocephalia sp. Roemer 1849 trilobite
 Olenida - Parabolinoididae
"Parabolinoides sp." = Orygmaspis (Parabolinoides)
"Parabolinoides sp." = Orygmaspis (Parabolinoides) Frederickson 1949 trilobite
 Olenida - Dokimokephalidae
Pinctus sp., ? Burnetiella sp.
Pinctus sp. Wilson 1951 trilobite
? Burnetiella sp. Lochmann 1958 trilobite
originally entered as "? Burnetiella sp."
Artiopoda
 Agnostida - Diplagnostidae
Pseudagnostus sp.
Pseudagnostus sp. Jaekel 1909
Lingulata
 Lingulida - Obolidae
Obolus sp., Lingulella sp.
Obolus sp. Eichwald 1829
Lingulella sp. Salter 1866
2 species
 Acrotretida - Acrotretidae
Acrotreta sp., Linnarssonella sp.
Acrotreta sp. Kutorga 1848
Linnarssonella sp. Walcott 1902
Rhynchonellata
 Orthida - Eoorthidae
Eoorthis remnicha
Eoorthis remnicha Winchell 1886