Strange and unusual echinoid

This is a very odd echinoid and while it's a truly fascinating fossil I really can't tell you a great deal about it.

While most echinoids are easily described and are basically the same as modern sea urchins - this is more of an oddity and has a bizarre flattened shape which then has protruding fingers like a starfish...!

It comes from Senegal in Africa and is approx 5 million years old.

If you know more about it  please let me know!