Trempealeau Fm., Lodi Mbr. (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: Lodi Member (Trempealeau Formation), Trempealeauan (501.0 - 485.4 Ma)

• "Trempealeauan"

• member-level stratigraphic resolution

Environment/lithology: peritidal; siltstone

• "dolomitic slst (18ft) micaceous, some mudcracks, some edgewise congl., x-lamination. nearshore (BA1), cratonic"

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 256: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Twenhofel et al. 1935"
 Corynexochida - Illaenuridae
Illaenurus sp. Hall 1863 trilobite
 Harpida - Harpetidae
Entomaspis sp. Ulrich 1931 trilobite
originally entered as "Entomespis sp."
  - Dikelocephalidae
Saukia sp. Walcott 1914 trilobite
Saukiella sp. Ulrich and Resser 1933 trilobite
Tellerina sp. Ulrich and Resser 1933 trilobite
Dikelocephalus sp. Owen 1852 trilobite
 Ptychopariida - Plethopeltidae
Plethopeltis sp. Raymond 1913 trilobite
Stenopilus sp. Raymond 1924 trilobite
 Ptychopariida - Catillicephalidae
Acheilops sp. Ulrich 1931 trilobite
 Ptychopariida -
Corbina sp. trilobite
 Asaphida - Eurekiidae
Eurekia sp. Walcott 1924 trilobite
 Aglaspida - Aglaspididae
Aglaspis sp. Hall 1862
 Lingulida - Obolidae
Lingulella sp. Salter 1866
Westonia sp. Walcott 1901
 Eogastropoda - Sinuopeidae
"Dirhachopea sp." = Schizopea
"Dirhachopea sp." = Schizopea Butts 1926 snail
originally entered as "Dirachopea sp."
 Dendroidea - Dendrograptidae
Dendrograptus sp. Hall 1858 graptolite