Alton, St. Louis limestone (Carboniferous of the United States)

Where: Madison County, Illinois (38.9° N, 90.2° W: paleocoordinates 14.0° S, 34.7° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: St. Louis Limestone Formation (Blue River Group), Visean (346.7 - 330.9 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; limestone

Size class: macrofossils

Preservation: adpression

Reposited in the FMNH

Primary reference: M. E. Williams. 1985. The "Cladodont level" sharks of the Pennsylvanian black shales of central North America. Palaeontographica Abteilung A 190:83-158 [M. Clapham/P. Vazquez]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 133416: authorized by Matthew Clapham, entered by Priscilla Vazquez on 12.09.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Symmoriiformes - Symmoriidae
Stethacanthus altonensis St. John and Worthen 1875 elasmobranch
FMNH UC27404