Dear NickGeo - My expertise is mostly UK Fossils, so I shall be interested to see any comments that arise from your find.
There many species of Spondylus, it is very unlikely to be rare (sorry to disappoint), there have been several papers written about Spondylus from the Pliocene of Cyprus. Perhaps try an internet search.
All the best,
Thank you so much for your info. It is however strange to me, that for a month now i m searching the web to find from an online store an identical fossil and I have not found anything so far. So i guess i should not get disappointed...yet:)
Spondylus is a definite possibility, but I cannot be definitive about it; I simply am not sure what all the alternatives are.
You could see if George Konstantinou can help.
You can send him a message and photo here - https://www.facebook.com/CyprusFossils.
(George has a very good collection of Cyprus fossils, and is the founder of the Association for the Protection of Biodiversity and Natural Heritage of Cyprus.)
An interesting paper on the Pliocene of Cyprus, FYI -