Barycrinus stellatus Crinoid Calyx Fossil

Image courtesy of the Smithsonian Institution Specimen Catalog Number:  USNM PAL 39942 Specimen GUID:             http://n2t.net/ark:/65665/m3d84e97de-ad18-4d93-b196-63b98eb801e1 Specimen housed in the collections of the Department of Paleobiology, National Museum of Natural History, Smithsonian Institution

Barycrinus stellatus (Troost, 1850) crinoid calyx fossil described in A Critical Summary of Troost's Unpublished Manuscript on the Crinoids of Tennessee by Elvira Wood 1909. Drawings in this post are from  Plate 8 figures 6-8 drawn by Major Adolphus Heiman (1809-1862). This crinoid was found in Keokuk horizon of the Tullahoma formation Stewart County Tennessee USA (Mississippian Period). It was assigned U.S. National Museum number 39942 and identified as a holotype. Originally it was called Cyathocrinites steallatus.

Photos are from the Smithsonian collection. The calyx is identified as being 19.5 mm in width. 

Image courtesy of the Smithsonian Institution Specimen Catalog Number:  USNM PAL 39942 Specimen GUID:                 http://n2t.net/ark:/65665/m3b87b9092-b56d-4328-a50b-6d88dbb88830 Specimen housed in the collections of the Department of Paleobiology, National Museum of Natural History, Smithsonian Institution

Image courtesy of the Smithsonian Institution Specimen Catalog Number:  USNM PAL 39942 Specimen GUID:                 http://n2t.net/ark:/65665/m3f3fd6c75-c59b-41d2-bf35-1580a382510c Specimen housed in the collections of the Department of Paleobiology, National Museum of Natural History, Smithsonian Institution

Image courtesy of the Smithsonian Institution Specimen Catalog Number:  USNM PAL 39942 Specimen GUID:                     http://n2t.net/ark:/65665/m362f5b1a6-526f-44bf-ad50-e774a9aabf28 Specimen housed in the collections of the Department of Paleobiology, National Museum of Natural History, Smithsonian Institution