Hi - found this while strolling on the beach this morning. Would love to know what it is!
Very interesting find.
Wish i was at Sandown strolling on the beach this morning!
I think it could be a water worn bivalve from a high energy environment, did you find any dino bones? on the right beach conditions it's possible to find them near the Dino museum at Yarvaland.
Inspiration simply is not dawning on me with this one!...
I guess, Tabfish, you're 'seeing' planed-off ridges and furrows at least on the side.
Such corrugation usually persists to the edge of the shell, eg.
And we don't see that in this specimen.
I can't quite see it being planed-off hinge dentition, either, somehow.
I wish I had an alternative to suggest!
I suggest you take your specimen to the Museum of Isle of Wight Geology, now at the Dinosaur Isle site.
They have permanent curator(s) now, and the collection includes many fossils, not just dinos.
Dinosaur Isle, Culver Parade, Sandown, Isle of Wight PO36 8QA
If you get an ID, please let us know!
Thank you Mike, and you too Tabfish. Am in the area of the the Dino museum this afternoon so will try to get in for an ID as you suggest. (They have been helpful in the past with bits of dino bone etc). Will keep you posted...
Went into Dinosaur Isle as suggested, and without hesitation the chap there said its Pterotrigonia aliformis - a 105m yrs old bivalve from the upper greensand Perna beds (I think) at Sandown. So Tabfish you were right. Thanks again for your help.
It helped having two bivalves in my shed, totaly different specimens to the one sadlimpet found (Hippopodium ponderosum) but the preservation looked similar.