Chimaeroid tooth? Found in South Lithuania

[D.N.FossilmanLithuania]

Dear Guys,

 

I recently found this thick perforated chimaeroid like fossil in lagoonal dolomite, it is 5 mm length.

It is found in erratic boulder of Varena town, South Lithuania. The perforations in Tremataspis scales are the same thickness in all surface but my find has much thicker perforations by the one edge and I would think it is dental plate of chimaera. The fossil is thin but I saw the gastropod fauna in these dolomites and some species can speak about Carboniferous- Permian age although very similar dolomites in Northern Estonia are Silurian in age and they also have orthogastropod and bivalve fauna.

Please let me know- is it osteostracan scale or is it chimaeroid tooth, and what species are the most possible then? 

Any help will be appreciated!

 

Best Regards

Domas 

[Archie]

This certainly looks like a Holocephalan chimaeroid tooth, the surface looks like it has dentine tubules and there are foramina around the edge. It looks like a Cochliodontid such as a Psephodus sp. Great find and very beautiful! 

Best Regards

Sam

[Archie]

Another possibility could be a Lagarodus sp. but hard to tell from this image.