Plate P6. 1. Rhizosolenia praebergonii Mukhina (Sample 185-1149A-7H-7, 37-39 cm). 2. Roperioa tesselate Roper (Sample 185-1149A-8H-1, 117-119 cm). 3. Rosiella tatsunokuchiensis Koizumi (Sample 185-1149A-10H-4, 135-141 cm). 4. Rosiella cf. tatsunokuchiensis Koizumi (Sample 185-1149A-8H-1, 117-119 cm). 5. Rouxia californica M. Pergallo (Sample 185-1149A-11H-3, 131-137 cm). 6. Gomphonema cf. affine (Sample 185-1149A-10H-1, 135-141 cm). 7. Simonseniella barboi Brun (Sample 185-1149A-6H-1, 112-114 cm). 8. Simonseniella curvirostris JousÚ (Sample 185-1149A-1H-1, 61-63 cm). Scale bars = 10 Ám.