Thursday, March 9, 2023

Cleiocrinus tessellatus Crinoid Calyx Fossil

Cleiocrinus tessellatus
(Troost, 1850) crinoid calyx fossil Plate 7 figures 11 drawn by Major Adolphus Heiman (1809-1862) from A Critical Summary of Troost's Unpublished Manuscript on the Crinoids of Tennessee by Elvira Wood 1909. This crinoid was found in the Lebanon limestone (Silurian Period) division of the Stones River Formation of Duck River, near Columbia, Maury County Tennessee USA. It was assigned U.S. National Museum number 39910 and identified as a holotype.

Pictures of the actual Troost fossil at the Smithsonian shown below. 

Image courtesy of the Smithsonian Institution Specimen Catalog Number:  USNM PAL 39910 Specimen GUID: Specimen housed in the collections of the Department of Paleobiology, National Museum of Natural History, Smithsonian Institution