Syracosphaera anthos
This is a rare example of Syracosphaera anthos with the exothecal cover of coccoliths (in green) almost completely in place. Species with exothecal coccoliths are very fragile and often disintegrate during the filtration process.

Details: Specimen from the North Atlantic (station FB16), sample courtesy of Michael Knapppertsbusch.
Filename: 122-11 copy.jpg