Where: Cass County, Nebraska (40.4° N, 95.8° W: paleocoordinates 1.2° S, 27.5° W)
• coordinate stated in text
When: Streptognathodus virgilicus conodont zone, Ervine Creek Limestone Member (Deer Creek Formation), Rusavkinian (303.7 - 302.2 Ma)
• Lower Gzhelian, correlative to Rusavkian 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. 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 124441: authorized by John Alroy, entered by Briony Mamo on 15.02.2012
Creative Commons license: CC BY (attribution)
Taxonomic list
Crinoidea | |
Plaxocrinus crassidiscus Miller and Gurley 1894 Sea lily | |
Apographiocrinus typicalis Moore and Pummer 1940 Sea lily
Apographiocrinus platybasis Pabian and Strimple 1980 Sea lily | |
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Delocrinus vulgatus Moore and Plummer 1940 Sea lily
Graffhamicrinus magnijkus Strimple 1947 Sea lily |