This fossil appears to be a
Gennaeocrinus kentuckiensis (Shumard, 1866) crinoid calyx fossil. It was found in the Jeffersonville Limestone of Jefferson County, Kentucky USA. This layer dates to the Devonian Period (Givetian). Genus was named by Charles Wachsmuth and Frank Springer in 1881.
Wow, this fossil has a very nicely preserved outer pattern!
Document used to identify the fossil was Memoir 16
The Devonian Crinoids of the State of New York by
Winifred Goldring, The University of the State of New York, 1923. Page 558? description of plate 31 on page 228?. One of the specimens used to describe fossil is listed as from collection of Doctor Springer and found at Hamilton Shale of Falls of the Ohio, Louisville, Ky. Also listed is a American Museum Natural History number 4162 found at Bear Grass creek in Louisville, Ky.
Thanks to Kenny for image and discovering this fossil.
