Penn-Dixie Cement Co. quarry, Stark Shale, Winterset (Carboniferous of the United States)

Where: Madison County, Iowa (41.3° N, 94.0° W: paleocoordinates 1.4° S, 26.4° W)

When: Dennis Formation (Bronson Group), Kasimovian (307.0 - 303.7 Ma)

• Stake shale, Dennis formation, Bronson group. Missouri series. Westphalian D, Pennsylvanian.

Environment/lithology: marine; shale

Size class: macrofossils

Collected by Gerard R. Case, WD White, W. Rushlau; reposited in the FMNH

Primary reference: R. Zangerl and G. R. Case. 1973. Iniopterygia, a New Order of Chondrichthyan Fishes from the Pennsylvanian of North America. Fieldiana Geology Memoirs 6:1-67 [M. Clapham/P. Vazquez/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 132118: authorized by Matthew Clapham, entered by Priscilla Vazquez on 08.08.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Iniopterygia - Iniopterygidae
Iniopteryx rushlaui Zangerl and Case 1973 cartilaginous fish
Iniopteryx tedwhitei Zangerl and Case 1973 cartilaginous fish
 Eugeneodontiformes - Eugeneodontidae
Bobbodus schaefferi Zangerl 1981 chimaera