Dresbach community, Eau Claire Mbr., Dresbach Fm. (Cambrian of the United States)

Where: Wisconsin (44.5° N, 89.6° W: paleocoordinates 22.2° S, 88.0° W)

• coordinate based on political unit

When: Crepicephalus zone, Eau Claire Member (Dresbach Formation), Cambrian (538.8 - 485.4 Ma)

• "Dresbach - Crepicephalus zone."

Environment/lithology: marine; glauconitic sandstone

• "thin-to-thick bedded med.grained ss; x-lamination (75 ft); some congl., glauconite, mudcracks. 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: taxonomic analysis

PaleoDB collection 230: authorized by Jack Sepkoski, entered by Mike Sommers on 21.03.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Twenhofel et al. [year illeg.]"
Palaeacmaea indet. Hall and Whitfield 1872
originally entered as "Palaeacmaea sp."
 Pelagiellida - Pelagiellidae
Pelagiella sp. Matthew 1895
 Hyolithida - Hyolithidae
Hyolithes sp. d'Eichwald 1840
 Lingulida - Obolidae
Obolus sp. Eichwald 1829
Lingulepis sp. Hall 1863
Lingulella sp. Salter 1866
 Agnostida - Ammagnostidae
Proagnostus sp. Butts 1926
 Corynexochida - Kaolishaniidae
Pagodia sp. Walcott 1905 trilobite
 Asaphida - Asaphidae
Maryvillia sp. Walcott 1916 trilobite
 Ptychopariida - Catillicephalidae
Pemphigaspis sp. Hall 1863 trilobite
 Ptychopariida - Lonchocephalidae
Lonchocephalus sp. Owen 1852 trilobite
 Ptychopariida - Marjumiidae
"Armonia sp." = Modocia
"Armonia sp." = Modocia Walcott 1924 trilobite
 Ptychopariida - Crepicephalidae
Crepicephalus sp. Owen 1852 trilobite
Coosia sp. Walcott 1911 trilobite
 Ptychopariida - Menomoniidae
Dresbachia sp. Walcott 1916 trilobite