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A new occurrence of Granatocrinus granulatus (Roemer) from the Fort Payne Chert of Alabama

The Mississippian was a time of widespread diversification of pelmatozoan echinoderms in the United States. The crinoids and blastoids were diverse and abundant in a variety of geologic settings. Most of the Osagean occurrences of blastoids are associated with platform carbonates such as the Burlington Limestone. These blastoids lived in association with a crinoid community dominated by camerate crinoids. Blastoids also lived in coeval Osagean deltaic environments such as the Borden Delta but were less diverse and abundant.