Nice one sadlimpet!
You got me!
The roundels look like crinoid, the wavy line makes me think brain coral, but I am unconvinced.
Tabfish - you looking?
Just got back from a Diamond wedding celebration weekend in Salisbury 260 miles away from home!
Nice stone sadlimpet! hard to say what it is but could they be sutures from an ammonite's shell?
I have a few finds from the same area that I will post.
Thanks for your thoughts.
The wavy lines are too thick for ammonite sutures, methinks.
I wish we knew the 3D structure.
Sorry, but we seem to be doing no better than guesses.
I gave this one more thought and giving away my location, a possibility it is a fossile de plocoscyphia google the image as I cannot get a link Sorry
Wow managed in the end, also find the link on the page mon site
Great job - thanks!
The images here show what it looks like in 3D
As wll as Plocoscyphia roemeri (above), there are Pp. agglomerata, centuncula, communis, elegans, fenestrata, gaultina, maaki (and maybe others).
Here's a different-looking example, but preserved in flint, like yours (in England)
Plocoscyphia agglomerata has been recorded from the chalk of Kent (similar to Isle of Wight)
Plocoscyphia fenestrata has been recorded from the chalk of Wiltshire (similar to Isle of Wight)
I can't determine which species have been recorded from the Isle of Wight, so I can't make a suggestion for the species in your specimen, but I hope the genus is good enough.