Top of quarry, north side of Wisconsin State Rte 81, 6.4 km west of Rte 213 (Ordovician of the United States)

Where: Rock County, Wisconsin (42.6° N, 89.2° W: paleocoordinates 21.6° S, 62.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Phragmodus undatus conodont zone, Forreston Member (Grand Detour Formation), Blackriveran (460.9 - 449.5 Ma)

• member-level stratigraphic resolution

Environment/lithology: limestone

Size class: macrofossils

Preservation: cast

Primary reference: J., J.r. Pojeta, D. J. Eernisse, R. D. Hoare and M. D. Henderson. 2003. Echinociton dufoei: a new spiny Ordovician chiton. Journal of Paleontology 77(4):646-654 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 98349: authorized by Pete Wagner, entered by Pete Wagner on 02.10.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Oncocerida - Oncoceratidae
aff. Beloitoceras sp. Foerste 1924
Polyplacophora
 Paleoloricata - Echinochitonidae
Echinochiton dufoei n. gen. n. sp.
Echinochiton dufoei n. gen. n. sp. Pojeta et al. 2003 chiton
Gastropoda
 Murchisoniina - Trochonematidae
Trochonema sp. Salter 1859 snail
 Murchisoniina - Lophospiridae
? Lophospira sp. Whitfield 1886 snail
 Euomphalina - Helicotomidae
Helicotoma planulata Salter 1859 snail
Bivalvia
 Cyrtodontida - Cyrtodontidae
Cyrtodonta huronensis Billings 1858 clam
 Solemyida - Ctenodontidae
Ctenodonta nasuta Hall 1847 clam
Tancrediopsis sp. Beushausen 1895 clam