Ulrich Locality 101-v, Hahatonka Springs, 1.25 miles north of Decaturville (Cambrian of the United States)

Where: Shannon County, Missouri (37.9° N, 92.8° W: paleocoordinates 21.3° S, 86.8° W)

• outcrop-level geographic resolution

When: Missisquoia trilobite zone, Eminence Formation, Trempealeauan (501.0 - 485.4 Ma)

• Given as Lower Chert of the Gasconade. However, Missisquoia trilobite zone is the top of the underlying Eminence

• formation-level stratigraphic resolution

Environment/lithology: dolomite

Size classes: macrofossils, mesofossils

Preservation: replaced with silica

Collected by E.O. Ulrich & H.E. Dickhaut in 20/09/1905; 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 98340: authorized by Pete Wagner, entered by Pete Wagner on 01.10.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Eogastropoda - Sinuopeidae
Gasconadia putilla, "Jarlopsis conicus" = Euconia conicus
Gasconadia putilla Sardeson 1896 snail
"Lophospira with swollen lip" in Ulrich's notes; observed in NMNH collections
"Jarlopsis conicus" = Euconia conicus Heller 1954 snail
Eotomaria sp. in Ulrich's notes; observed in NMNH collections
Polyplacophora
 Paleoloricata - Mattheviidae
"Preacanthochiton depressus" = Chelodes
"Preacanthochiton depressus" = Chelodes chiton