Keokuk limestone, Keokuk (Carboniferous of the United States)

Where: Iowa (40.4° N, 91.4° W: paleocoordinates 17.6° S, 35.9° W)

When: Keokuk Limestone Formation (Augusta (Osage) Group), Osagean (353.8 - 342.8 Ma)

Environment/lithology: marine; limestone

Size class: macrofossils

Collection methods: Repository: Museum of Comparative Zoology

Primary reference: C. R. Eastman. 1903. Carboniferous fishes from the central western States. Bulletin of the Museum of Comparative Zoology 39:163-226 [M. Clapham/P. Vazquez/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 133094: authorized by Matthew Clapham, entered by Priscilla Vazquez on 01.09.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Phoebodontiformes - Phoebodontidae
Phoebodus densneptuni n. sp. Eastman 1903 elasmobranch
 Cochliodontiformes - Cochliodontidae
Deltodus spatulatus, "Deltodus occidentalis" = Cochliodus occidentalis
Deltodus spatulatus Newberry and Worthen 1866 chimaera
"Deltodus occidentalis" = Cochliodus occidentalis Leidy 1857 chimaera
 Petalodontiformes - Petalodontidae
Chomatodus inconstans Saint John and Worthen 1875 chimaera