Plate P3. Scale bar = 10 µm. 1. Coscinodiscus decrescens (Sample 183-1140A-20R-4, 25-27 cm). 2. Actinocyclus octonarius (Sample 183-1140A-6R-1, 100-102 cm). 3. Coscinodiscus asteromphalus (Sample 183-1140A-4R-CC). 4. Thalassiosira sp. (Sample 183-1140A-20R-1, 25-27 cm). 5. Azpeitia endoi (Sample 183-1140A-2R-2, 100-102 cm).