Ironton "Oboloid subfauna," Elvinia zone?, Franconia Fm. (Cambrian of the United States)

Where: Wisconsin (44.5° N, 89.6° W: paleocoordinates 21.5° S, 79.3° W)

• coordinate based on political unit

When: ? Elvinia zone, Ironton Member (Franconia Formation), Franconian (497.0 - 485.4 Ma)

• "lower Franconian, Elvinia zone"

Environment/lithology: offshore; burrowed, glauconitic sandstone

• "glauconitic qtz ss, thick bedded; burrows; x-lamination. Nearshore (BA1?)"

Size class: macrofossils

Primary reference: W. H. Twenhofel, G. O. Raasch, and F. T. Thwaites. 1935. Cambrian strata of Wisconsin. Geological Society of America Bulletin 46(11):1687-1744 [P. Wagner/P. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 267: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Twenhofel et al. 1935"
Show authors, comments, and common names
Trilobita
 Ptychopariida - Elviniidae
Irvingella sp., Elvinia sp.
Irvingella sp. Ulrich and Resser 1924 trilobite
Elvinia sp. Walcott 1924 trilobite
 Olenida - Pterocephaliidae
Housia sp., Camaraspis sp.
Housia sp. Walcott 1916 trilobite
Camaraspis sp. Ulrich and Resser 1924 trilobite
 Olenida - Dokimokephalidae
"Burnetia sp." = Burnetiella
"Burnetia sp." = Burnetiella Lochmann 1958 trilobite
Tergomya
 Kiringellida -
Hypseloconus sp.
Hypseloconus sp. Berkey 1898
Helcionelloida
 Helcionellida - Pelagiellidae
Pelagiella sp.
Pelagiella sp. Matthew 1895
Lingulata
 Acrotretida - Acrotretidae
Linnarssonella sp.
Linnarssonella sp. Walcott 1902
 Lingulida - Obolidae
Lingulepis sp., Obolus sp.
Lingulepis sp. Hall 1863
Obolus sp. Eichwald 1829