Upper Pilgrim Fm. #4 (Cambrian of the United States)

Also known as SW Montana

Where: Montana (46.0° N, 112.5° W: paleocoordinates 5.5° S, 81.3° W)

• coordinate based on political unit

When: Aphelaspis zone, Pilgrim Formation, Dresbachian (497.0 - 485.4 Ma)

• "Dresbachian, Aphelaspis zone"

Environment/lithology: marine; grainstone

• "calcarenites, shallow carbonate, BA3, cratonic"

Size class: macrofossils

Primary reference: C. Lochman and C. Hu. 1962. An Aphelaspis Zone faunule from Logan, Montana. Journal of Paleontology 36(3):431-441 [M. Patzkowsky/P. Borkow/J. Ju]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 236: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "C. Lochman and C.-H. Hu, 1962. An Aphelaspis zone faunule from Loga[illeg.] Montana. J.Paleo 36:431-441"
Show authors, comments, and common names
Trilobita
 Olenida - Aphelaspidae
"Aphelaspis sp." = Aphelaspis, "Labiostria sp." = Aphelaspis
"Aphelaspis sp." = Aphelaspis Resser 1935 trilobite
"Labiostria sp." = Aphelaspis Resser 1935 trilobite
 Ptychopariida - Kingstoniidae
Blountia sp.
Blountia sp. Walcott 1916 trilobite
 Ptychopariida - Lonchocephalidae
Glaphyraspis sp.
Glaphyraspis sp. Resser 1937 trilobite
 Asaphida - Asaphidae
Maryvillia sp.
Maryvillia sp. Walcott 1916 trilobite
 Corynexochida - Cheilocephalidae
Cheilocephalus sp.
Cheilocephalus sp. Berkey 1898 trilobite
Lingulata
 Lingulida - Dysoristidae
Dysoristus sp.
Dysoristus sp. Bell in Lochman and Duncan 1941
Rhynchonellata
 Orthida - Eoorthidae
Eoorthis sp.
Eoorthis sp. Walcott 1908
Strophomenata
 Billingsellida - Billingsellidae
Billingsella sp.
Billingsella sp. Hall and Clarke 1892
Tergomya
 Kiringellida -
Hypseloconus sp.
Hypseloconus sp. Berkey 1898
 Tryblidiida - Tryblidiidae
"Propilina sp." = Proplina
"Propilina sp." = Proplina Kobayashi 1933
originally entered as "Proplina sp."