Where: Cass County, Nebraska (41.0° N, 95.9° W: paleocoordinates 0.2° S, 26.7° W)

When: Streptognathodus vitali conodont zone, Stull Shale Member (Kanwaka Formation), Rusavkian (303.4 - 302.2 Ma)

• Lower Gzhelian, correlative to Rusavkian of Russian Platform.

Environment/lithology: marine; shale

Size class: mesofossils

Reposited in the USNM

Primary reference: R. K. Pabian and W. J. Rushlau. 2002. Taphonomic Analysis and Systematic Descriptions of Some Late Pennsylvanian and Early Permian Crinoids from Southeastern Nebraska, Eastern Kansas and Southwestern Iowa. Geological Survey Papers 20 [J. Alroy/B. Mamo] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 124407: authorized by John Alroy, entered by Briony Mamo on 14.02.2012

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)