Where: Grundy County, Illinois (41.2° N, 88.3° W: paleocoordinates 5.3° S, 23.9° W)

When: Francis Creek Shale Member (Carbondale Formation), Moscovian (315.2 - 307.0 Ma)

• Francis Creek shale, Carbondale formation. Westphalian upper C, or lower D, Pennsylvanian.

Environment/lithology: deltaic; shale

Size class: macrofossils

Reposited in the FMNH

Primary reference: R. Zangerl. 1979. New Chondrichthyes from the Mazon Creek fauna (Pennsylvanian) of Illinois. In M. H. Nitecki (ed.), Mazon Creek Fossils 449-500 [M. Clapham/P. Vazquez]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 132450: authorized by Matthew Clapham, entered by Priscilla Vazquez on 16.08.2012

Creative Commons license: CC BY (attribution)