Where: Cass County, Nebraska (41.0° N, 96.0° W: paleocoordinates 0.1° N, 27.1° W)

• coordinate stated in text

When: Streptognathodus firmus conodont zone, Merriam Limestone Member (Plattsburg Formation), Khamovnichean (305.9 - 304.8 Ma)

• Early Gzhelian (Missourian), correlative to Khamovnichean of Russian Platform.

Environment/lithology: marine; limestone

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 124446: authorized by John Alroy, entered by Briony Mamo on 15.02.2012

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