Trilobite Pygidiums of the Birdsong Formation

These pictures show four different trilobite pygidiums from the Devonian Birdsong formation of western Tennessee, USA.  Identifications on these fossils is not been determined.  Thanks to Herb for showing me these fossils.

Huntonia lindenensis? Trilobite Cephalon

A cephalon of a Huntonia lindenensis? trilobite found in western Tennessee.  The fossil was found in the Birdsong Formation of the Lower Devonian Period.  It appear to be a molt as the eye lens on one side are covered with a bryozoan.  The molt must have been exposed on the seafloor for a while for this colony to establish.

Thanks to Herb for letting me photograph it.

Franken-Trimerus Trilobite

When you search for trilobite fossils around the Louisville, Kentucky area there is a high probability that none will be found.  On a good day and at the right location one can walk away with some nice fragments.  Every so often lightning might strike near by or an entire trilobite fossil will be found.  This post is not about that.

The image presented is of fragments of a Trimerus trilobite that could be cobbled together to create a Franken-Trimerus.  It would be a monster.  The main pieces are present: head (cephalon), body (thorax), and tail (pygidium).  It needs more thorax.

Even if the beast was assembled, it take more than a mad scientist and lightning to awaken it. Could make for an interesting movie though on the SyFy channel.  [Que the Weird Science music]

Fossils were found in the Waldron Shale (Silurian) of Clark County, Indiana.  Thanks to Kenny for the photos.