Tentaculites scalariformis

Phylum Mollusca and the class is Gastropoda making this creature a small snail.

Its distinctive shell makes it look sort of like a very small cephalopod.

I think this creature is Tentaculites scalariformis.

In the "North American Index Fossils Invertebrates Volume II" by Amadeus W. Grabau and Hervey Woodburn Shimer from 1910 on page 10 describes Tentaculites as:
"Shell straight or slightly curved, elongate, tapering, conical, with circular cross section and terminating posteriorly either acutely or in a bulb. Surface marked by strong tranverse rings which are closely arranged near the apex and more distant and stronger near the mouth. Fine transverse and rarely longitudinal striae are present. Apical portion often filled with calcareous matter or divided off by transverse septa."

It goes on to say creature existed in the Ordovician to Devonian periods with it being very abundant in the Silurian and Devonian periods.

The book describes T. scalariformis (Hall) as:
"Differs from T.bellulus in the more obtuse annulations of the distal portion, with narrower interspaces, and in the more rapidly narrowing apical portion. Onondaga of New York, Ohio and Indiana."

It is also described in the Indiana Department of Geology and Natural Resources Twenty-Fifth Annual Report issued in 1900 on page 736.

Devonian Pelecypod or Clam

Here is a clam I found at Speed Quarry, Indiana back in April. Until a few days ago I did not know its scientific name until I came across an Indiana Geological Annual Report for 1900. It had a section on Devonian fossils and this was pictured on one of the plates.

This clam or pelecypod is called Paracyclas lirata.

I will update this section later with a image with a scale to show how big this clam was. Also I believe I have found 2-3 of these species.

Another thing I recently learned is that the Jeffersonville limestone layer found here locally is very similar to the Columbus limestone layer found in Ohio. Since we have to refer to Ohio fossil bulletins from the State of Ohio Department of Natural Resources Division of Geological Survey it is good to know. Referring to their Bulletin 54 from 1955, they comment that the genus Paracyclas could be called "round clam". It also refers to a species of clam called Paracyclas elliptica that occurs in Columbus, Deleware, and Prout layers.

Crinoid Calyx Fragment

Here is the bottom of a crinoid calyx or head.

It is from Joe Prather Highway which is a location about an hour south of Louisville, Kentucky on I-65.

I am not sure of the species or time period. Will continue to research and post later.