Where: Montgomery County, Iowa (41.2° N, 95.0° W: paleocoordinates 0.9° S, 26.6° W)

• coordinate stated in text

When: Streptognathodus simulator conodont zone, Plattsmouth Limestone Member (Oread Limestone Formation), Rusavkinian (303.7 - 302.2 Ma)

• Early Gzhelian, Rusavkian Substage from 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. Nebraska Geological Survey Paper Geological Survey Papers 20:1-45 [J. Alroy/B. Mamo/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 124485: authorized by John Alroy, entered by Briony Mamo on 16.02.2012

Creative Commons license: CC BY (attribution)