Gennaeocrinus kentuckiensis Crinoid Calyx Fossil

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.

LINK to source document.

Rhodocrinus nodulus Crinoid Calyx Fossil

This fossil appears to be a Rhodocrinus nodulus (Hall) crinoid calyx fossil. It was found in the Jeffersonville Limestone of Jefferson County, Kentucky USA. This layer dates to the Devonian Period.

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 488 description of plate 2 on page 89. Specimen used to describe fossil is listed as from collection of Doctor Springer and found at Hamilton Shale of Falls of the Ohio, Louisville, Ky.

Thanks to Kenny for image and discovering this fossil.

Polyaxons strongylasters Sponge Spicule Fossils

These images are of Polyaxons strongylasters sponge spicule fossils. They were found trapped in cavities in Halysites coral fossils and a microscope is needed to see them. The images have a 1-2mm field of view.

The fossils were found in the Louisville Limestone of Jefferson County, Kentucky USA. This layer dates to the Silurian Period.

Thanks to Kenny for images and discovering them with his microscope.