Bivalve or brachiopod? I keep on finding fossils like this

[SilurianSalamander]

[Fossildude19]

Not sure there is enough there to tell one way or the other.

[Bringing Fossils to Life]

I would guess brachiopod, but I only recently found out the difference.

[fifbrindacier]

I also think there isn't enough to say wether this is a brachiopod or a bivalve

[val horn]

If you feel like playing percentages brachiopods will be found in the older rocks while bivalves will be much more common after the paleozoic