Genus & species for "Sputnik" sea urchin?

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Can anyone supply the genus & species names (and locality) for the
"Sputnik" sea urchins commonly offered for sale on eBay? See, e.g.,
http://cgi.ebay.com/WHOLE-SPUTNIK-SEA-URCHIN-SEASHELL_W0QQitemZ6549571990QQcategoryZ4838QQssPag eNameZWDVWQQrdZ1QQcmdZViewItem.

[[email protected]]

I found the answer. See
http://www.conchology.be/en/availableShells/ShellsForSaleDetails.php?uniquenumber=251924#f