Ulrich Loc. 399-c. 2½ miles above mouth of Little Indian Creek (Cambrian of the United States)

Also known as 6-7 miles north of St. Clair

Where: Shannon County, Missouri (38.4° N, 90.9° W: paleocoordinates 22.6° S, 85.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Trilobite Beds Member (Eminence Formation), Trempealeauan (501.0 - 485.4 Ma)

• Lower Eminence; Given as Rasettia magna, but every other source puts that in the lower Potosi formation.

• group of beds-level stratigraphic resolution

Environment/lithology: dolomite

Size class: macrofossils

Preservation: cast

Collected by Ulrich & St.Clair in 1915; reposited in the USNM

Primary reference: J., J.r. Pojeta, M. J. Vendrasco, and G. Darrough. 2010. Upper Cambrian chitons (Mollusca, Polyplacophora) from Missouri, USA. Bulletins of American Paleontology (379)1-182 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 98342: authorized by Pete Wagner, entered by Pete Wagner on 01.10.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Eogastropoda - Sinuopeidae
"Dirhachopea intermedia" = Schizopea normalis, "Taeniospira emminencis" = Sinuopea emminencis
"Dirhachopea intermedia" = Schizopea normalis Ulrich et al. 1931 snail
observed in NMNH collections
"Taeniospira emminencis" = Sinuopea emminencis Ulrich et al. 1931 snail
observed in NMNH collections; Taeniospira glabra of Ulrich's notes
Polyplacophora
 Paleoloricata - Aulochitonidae
Aulochiton sannerae Pojeta et al. 2010 chiton