Orbulina (orb-you-line-a) - light microscopic image of a living planktonic foraminifer showing the large, spherical calcitic shell that encloses a smaller more dense spiral shell attached laterally on the inside. Numerous spines radiate out from the surface of the shell and contain dinoflagellate algal symbionts that are enclosed by the foraminferal cytoplasm that streams outward along the spines. This picture was taken by O. Roger Anderson of material from oceanic samples. Image copyright: O. R. Anderson, image used under license to MBL (micro*scope).
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From the collection
Radiolaria by O. R. Anderson
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