Paleontica Community

I found what I think must be a tooth. In the Devonian, no reptiles were around, so if it is a tooth, it is probably shark or some large fish. It was very distictly black against the grey matrix. Regrettably the tip was broken when I found it, the inside dull, but black. It is 20x11mm across and 22mm high. The edge seems a bit sharper, but it is not serrated. There is some paralel striping appr. 1 mm apart lengthwise.

Does anyone recognise this fossil?

I do not think this is a tooth, but the internal mold of bivalve.

Since specific 'tooth' textures or structures are missing, and considering the location, tooth can virtually be ruled out as an option. Instead, I believe it is obviously an internal mould of a mollusc.
However, I would not opt for bivalve too fast
Have you considered the option that it could be cephalopod? More specifically the body chamber.

Thanks Niels and Frederik,

I am considering it may be the interal mould of a mollusc. However, if it is an internal mould, the shell should be on the negative, which it is not, or the shell has desolved, in which case there should be a hollow space where it used to be, which is not there, or the internal mould was refossilised. Do you think this is likely at that location?

Am I right? Thanks for helping me think about it, and I hope you will reply again.

This object reminds me of a pen (Penna sp.) shell which is fairly common in the Late Eocene of Florida.

Hmmm... I might see traces of calcite (shell?) bottom pic, left edge of the matrix.

Anyway, though I see the resemblance with Pinna fossils this one is most definitely no Pinne given the age.

My bet would still be on cephalopod.

Maybe it's an internal mould of an inarticulate brachiopod, like Lingula? The very faint ribs make me think this.