Upper Carboniferous Unknown - Fossil in shale phosphorite nodule

[Titan]

Hi All, 

 

I'm having trouble identifying what I have here. It's from the Upper Carboniferous - Pennsylvanian Stark shale. It is in a phosphorite nodule. Dimensions are 1.5 inch (3.81 cm) long by 1 inch (2.54 cm) wide. Any ideas would be appreciated. 

Apologies for the green tint - not sure what that is except for maybe the camera picking up the radiation from this shale layer .

 

Thanks,

 

 

[Petalodus12]

Could possibly be vertebrate material, maybe fish skull material, but I’m not sure

[jdp]

Actinopterygian (ray-finned fish) parasphenoid. An actinopt expert might be able to ID it more definitely.

[Titan]

@Petalodus12 @jdp thanks for the ID!