Plate P1. Silicoflagellates, Sites 1257 and 1258 (scale bar = 10 µm). 1. Bachmannocena diodon (Sample 207-1258A-16R-CC). 2. Bachmannocena diodon (Sample 207-1219A-15R-CC). 3, 4. Naviculopsis lata oblique (Sample 207-1258A-14-CC). 5. Dictyocha bachmanni (focused on the apical structure) (Sample 207-1258A-16R-CC). 6. Corbisema bimucronata (variety with blunt corners and no spines) (Sample 207-1257B-7X-CC). 7. Dictyocha spinosa (Sample 207-1258A-4R-CC).

Plate P1. Silicoflagellates, Sites 1257 and 1258 (scale bar = 10 µm). 1. Bachmannocena diodon (Sample 207-1258A-16R-CC). 2. Bachmannocena diodon (Sample 207-1219A-15R-CC). 3, 4. Naviculopsis lata oblique (Sample 207-1258A-14-CC). 5. Dictyocha bachmanni (focused on the apical structure) (Sample 207-1258A-16R-CC). 6. Corbisema bimucronata (variety with blunt corners and no spines) (Sample 207-1257B-7X-CC). 7. Dictyocha spinosa (Sample 207-1258A-4R-CC).