Where: Cass County, Nebraska (40.9° N, 96.2° W: paleocoordinates 0.7° S, 27.4° W)
• coordinate stated in text
When: Streptognathodus vitali conodont zone, Stull Shale Member (Kanwaka Formation), Rusavkinian (303.7 - 302.2 Ma)
• Early 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. 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 124444: authorized by John Alroy, entered by Briony Mamo on 15.02.2012
Creative Commons license: CC BY (attribution)
Taxonomic list
Crinoidea | |
Graffhamicrinus magnijkus Strimple 1947 Sea lily |