Unidentified Waldron Shale Fossil

Unidentified Waldron Shale fossil found in Clark County, Indiana, USA. It dates to the Silurian Period. I think it might be some sort trace fossil. Maybe some sort of Ruscophycus or Arthrophycus trace fossil?

UPDATE (2018/01/15): A visitor Todd H. left me a message suggesting this might be a cephalopod Bickmorites. He has found in Silurian Laurel Dolomite and they are also found in Scott County Indiana. This identification seems valid though I cannot find this genus as appearing in the Waldron Shale before. My cousin Kenny suggest it might be part of the cephalopod Trochoceras which as been linked to this layer. See image at this web site http://chestofbooks.com/science/geology/Intro/The-Life-Of-The-Silurian.html. I did an image search and the pattern reminds me of a Silurian Goniatites (again I don't think these were ever found in the Waldron Shale.) See this image for plates show this fossil: http://www.codex99.com/illustration/systeme-silurian.html.

Ambonychia Clam Fossil with Bryozoan

These images are of Ambonychia sp. clam fossils encrusted with bryozoan. Fossils are from the Ordovician Period. They were found in Jefferson County, Indiana, USA.

Thanks to Kenny for images.

Vinlandostrophia Brachiopod Fossil with Friends

Here is an image of three fossils in one place. First is the Vinlandostrophia (Platystrophia) sp. brachiopod with an unidentified inarticulate brachiopod attached. On the inarticulate brachiopod is a Cornulites corrugatus worm tube fossil. These fossils date to the Ordovician Period. They might be from the McMillan/Grant Lake Formation and were found in eastern Jefferson County, Kentucky, USA.

Thanks to Kenny for image.