Plate P1. 1, 2. Thalassiosira antiqua (Grunow) Cleve-Euler (Sample 185-1149A-10H-2, 134-140 cm). 3, 4. Thalassiosira convexa Mukhina (Sample 185-1149A-10H-4, 135-141 cm). 5. Thalassiosira decipiens Grunow (Sample 185-1149A-9-3, 131-138 cm). 6. T. eccentrica (Ehrenberg) Cleve (Sample 185-1149A-8H-7, 39-41 cm). 7. Thalassiosira gravida Cleve (Sample 185-1149A-2H-4, 43-45 cm). 8. Thalassiosira jouseae Akiba (Sample 185-1149A-10H-1, 135-141 cm) 9. Thalssiosira leptopus (Grunow) Hasle and Fryxell (Sample 185-1149A-8H-7, 39-41 cm). Scale bars = 10 µm.

Plate P1. 1, 2. Thalassiosira antiqua (Grunow) Cleve-Euler (Sample 185-1149A-10H-2, 134-140 cm). 3, 4. Thalassiosira convexa Mukhina (Sample 185-1149A-10H-4, 135-141 cm). 5. Thalassiosira decipiens Grunow (Sample 185-1149A-9-3, 131-138 cm). 6. T. eccentrica (Ehrenberg) Cleve (Sample 185-1149A-8H-7, 39-41 cm). 7. Thalassiosira gravida Cleve (Sample 185-1149A-2H-4, 43-45 cm). 8. Thalassiosira jouseae Akiba (Sample 185-1149A-10H-1, 135-141 cm) 9. Thalssiosira leptopus (Grunow) Hasle and Fryxell (Sample 185-1149A-8H-7, 39-41 cm). Scale bars = 10 µm.