Where: Wibaux County, Montana (47.2° N, 110.2° W: paleocoordinates 7.4° S, 75.6° W)
• coordinate based on political unit
• outcrop-level geographic resolution
When: Hintzeia celsaora trilobite zone, Deadwood Formation, Tulean (485.4 - 471.8 Ma)
• "L. Ord.. upper Arenig"
•Zone G
• group of beds-level stratigraphic resolution
Environment/lithology: lagoonal; fine-grained, micaceous, brown, gray limestone
Size class: macrofossils
Primary reference: C. Lochman. 1966. Lower Ordovician (Arenig) faunas from the Williston Basin, Montana and North Dakota. Journal of Paleontology 40(3):512-548 [P. Wagner/P. Wagner/P. Wagner]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 174361: authorized by Pete Wagner, entered by Pete Wagner on 10.11.2015
Creative Commons license: CC BY (attribution)
Taxonomic list
Trilobita | |
Apatokephalus "sp. indet." Brögger 1896 trilobite | |
Presbynileus "sp. indet.", Ptyocephalus montanensis, Aulacoparia (Praecoparia) wibauxensis, Aulacoparia (Aulacoparina) impressa
Presbynileus "sp. indet." Hintze 1954 trilobite
Ptyocephalus montanensis trilobite | |
Hystricurus "sp. A" Raymond 1913 trilobite
Psalikilus paraspinosum Hintze 1953 trilobite | |
Licnocephala "sp. A" Ross 1951 trilobite | |
Lingulata | |
Lingulella "sp. indet." Salter 1866 | |
Rhynchonellata | |
Nanorthis putilla Walcott 1924 | |
Gastropoda | |
"Rhombella aff. umbilicata" = Euconia umbilicata
"Rhombella aff. umbilicata" = Euconia umbilicata Dake and Bridge 1932 snail | |
"Lecanospira (Barnesella) aff. affinis" = Teiichispira affinis
"Lecanospira (Barnesella) aff. affinis" = Teiichispira affinis Billings 1865 snail | |
Plethospira "sp. indet." Ulrich and Scofield 1897 snail |