Plate P6. Scale bar = 10 µm. 1. Reticulofenestra stavensis (Sample 189-1171C-29X-1, 117 cm) (polarized light [XP]). 2. Reticulofenestra bisecta bisecta (Sample 189-1171C-29X-1, 117 cm) (XP). 3. Reticulofenestra lockerii (Sample 189-1168A-39X-7, 15 cm) (XP). 4. Reticulofenestra hampdenensis (Sample 189-1168A-44X-5, 120 cm) (XP). 5, 6. Reticulofenestra pseudoumbilicus (Sample 189-1172A-21H-7, 15 cm); (5) Ph; (6) XP. 7. Reticulofenestra perplexa (Sample 189-1170A-21X-2, 60 cm) (XP). 8. Reticulofenestra gelida (Sample 189-1172A-10H-3, 117 cm) (XP). 9. Reticulofenestra minuta (Sample 189-1168A-46X-1, 2 cm) (XP). 10, 11. Reticulofenestra haqii (Sample 189-1172A-10H-3, 15 cm); (10) Ph; (11) XP. 12. Reticulofenestra producta (Sample 189-1168A-11H-6, 15 cm) (XP).

Plate P6. Scale bar = 10 µm. 1. Reticulofenestra stavensis (Sample 189-1171C-29X-1, 117 cm) (polarized light [XP]). 2. Reticulofenestra bisecta bisecta (Sample 189-1171C-29X-1, 117 cm) (XP). 3. Reticulofenestra lockerii (Sample 189-1168A-39X-7, 15 cm) (XP). 4. Reticulofenestra hampdenensis (Sample 189-1168A-44X-5, 120 cm) (XP). 5, 6. Reticulofenestra pseudoumbilicus (Sample 189-1172A-21H-7, 15 cm); (5) Ph; (6) XP. 7. Reticulofenestra perplexa (Sample 189-1170A-21X-2, 60 cm) (XP). 8. Reticulofenestra gelida (Sample 189-1172A-10H-3, 117 cm) (XP). 9. Reticulofenestra minuta (Sample 189-1168A-46X-1, 2 cm) (XP). 10, 11. Reticulofenestra haqii (Sample 189-1172A-10H-3, 15 cm); (10) Ph; (11) XP. 12. Reticulofenestra producta (Sample 189-1168A-11H-6, 15 cm) (XP).