Placoderm Possibility??

[minnbuckeye]

This past weekend, I had the pleasure of hunting with my rock club in central Iowa. I found what I think is placoderm, though there was multiple opinions given to me. Nothing earth shattering, but exciting for me! Can you help clarify the ID of the specimens?

  

 

The last piece broke revealing more "placoderm" inside. 

 

 

  

 

[connorp]

These all look like bone to me. Placoderm is probably a safe bet but I don't think any of the bits are diagnostic enough to rule out other bony fish. Nice finds. What club was this with?

[minnbuckeye]

@connorp

Black Hawk Gem and Mineral Society

[FossilDAWG]

The top two panels definitely look like bone and could well be placoderm plates.  Piece 1 looks like it is thin, folded around some surface, and cracked with some spreading causing splits to open.  It looks more like some sort of arthropod cuticle.  Piece 2 is similar. Of course you have a much better perspective with the actual specimens in hand.

 

Don

 

 

[minnbuckeye]

34 minutes ago, FossilDAWG said:

Piece 1 looks like it is thin

@FossilDAWG Piece 1 and piece 2 are from the broken rock of picture 3. So indeed they are bone if picture 3 is bone. Piece 1 and 2 were not supposed to show up!! Sometimes when I post things, pictures get added that were not my intentions. This was the case today.