Elaeacrinus verneuili Blastoid Fossil

These pictures show what appears to be an Elaeacrinus verneuili (Römer [aka Roemer], 1851) blastoid fossil. This specimen is partially embedded in matrix and measures about 15 mm long. I use to think Devonian blastoids like this were rare but after exploring a site after an hour or so one usually is found.

It was found in the Jeffersonville Limestone of Clark County, Indiana USA. It dates to the Devonian Period.

This species is also attributed to Gerard Troost (1776-1850) who identified it as Pentremites verneuili in 1841 in the 6th Report Geological State Tennessee on page 14. He later published two more mentions in 1849 and 1850 as Olivanites verneuili and Olivanites verneuili.[Source]

Eroded Spiny Crinoid Stem Fossil

 

Here is an image of an unidentified spiny crinoid stem fossil. It was found on a tombstone at St. Michael's Cemetery in Louisville, Kentucky, USA. The stone is composed of Bedford limestone (aka Indiana limestone, Salem limestone) from Indiana. It dates to the Mississippian Period. Fossil is about 4 mm wide.

Thanks to Kenny for the picture.

Glyptocrinus decadactylus Crinoid Calyx Fossil

 

This picture is of a crinoid calyx fossil called Glyptocrinus decadactylus (Hall, 1847). Picture was taken in 2016 at Indiana University Department of Geology. The fossil dates to the Ordovician Period and was found in the Alger Formation of Ohio, USA. Thanks to Kenny for the picture.