Indiana Scolecodonts

Scolecodont fossil from Madison, Indiana (Jefferson County) found in the Whitewater Formation.  This creature existed in the Ordovician Period.  Using the Dry Dredger scolecodont identification web page, this appears to be a Lobogenys (magnified 40x).  Note to reader, rest of images on page were taken with a microscope at 40x magnification.

This next fossil with its amber appearance is some sort of conodont. 

This next scolecodont might be an Arabellite.

This fossil is close up of the same fossil pictured at the beginning of the post so it is a Lobogenys.

This next fossil might be a Lobogenys as well.

This scolecodont with a fang still intact is probably an Arabellites.

This fossil could be a Colpogenys.

Not sure what this scolecodont is since it is missing quite a few teeth.

Another picture of the conodont shown earlier but photographed with a different type of light.

Unknown scolecodont fragment is the last picture.

Thanks to Kenny for the material to look through to find these.  So far I have found 13 scolecodont  pieces with four pretty much intact with one bag left to analyze.

Indiana Ordovician Crinoid Stems

All images have been magnified with a microscope 40x.  These fossils were found in Madison, Indiana (Jefferson County) located in the southeastern part of the state.  The formation might be Whitewater and the time period is Ordovician.  The Dry Dredger web pages on crinoid identification were used for this posting.

The first picture depicts maybe a Xenocrinus.  The next image might be a Plicodendrocrinus.

The third picture appears to be a Xenocrinus.

The fourth picture is a probably a Xenocrinus.

The last picture is a fragment of maybe a Plicodendrocrinus.

Thanks to Kenny for providing the research material.

Ammonite of Lyme Regis

Thanks to reader Shamalama of Pennsylvania, I have obtained my very own Lyme Regis ammonite so now I am happy as clam at high tide (or would that be an ammonite in mosasaur free waters).

This fossil ammonite is a Promicroceras planicosta found in the Black Ven Marl Member.  This small creature existed in the Sinemurian age or stage (about 191 million years ago) in the Lower Jurassic Period.  This age was named in 1842 by Alcide d'Orbigny and named after the Semur-en-Brionnais, France [source Wikipedia].  Lyme Regis is found in Dorset, England and is home of the famous paleontologist Mary Anning.  Lyme Regis is famous for their fossils particularly ammonites.

According to Wikipedia the Promicroceras (Spath, 1925) is classified as:

Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Superfamily: Eoderocerataceae
Family: Eoderoceratidae
Genus: Promicroceras
Species: planicosta