Plate P16. 1–3. Diphyes ficusoides Islam 1983b; (3) with operculum in place. All (550x). 4, 5. Distatodinium apenninicum Brinkhuis et al. 1992; (4) ventral surface (500x); (5) dorsal surface (500x). 6, 7. Distatodinium biffii Brinkhuis et al. 1992. 250x. 8, 9. Dracodinium condylos (Williams and Downie 1966b) Costa and Downie 1979; (8) optical section in dorsal view (300x); (9) ventral surface in ventral view (300x). 10. Dracodinium politum Bujak et al. 1980. Optical section in dorsal view (250x). 11, 12. Dracodinium varielongitudum (Williams and Downie 1966b) Costa and Downie 1979; (11) optical section in ventral view (350x); (12) dorsal surface (300x). 13. Dracodinium waipawaense (Wilson 1967c) Costa and Downie 1979. Ventral view of dorsal surface (250x). 14. Eatonicysta furensis (Heilmann-Clausen in Heilmann-Clausen and Costa 1989) Stover and Williams 1995. Ventral surface (500x). 15, 16. Eatonicysta pterococcoides (O. Wetzel 1933b) Sarjeant 1985b. 550x. 17–19. Eatonicysta ursulae (Morgenroth 1966a) Stover and Evitt, 1978; (17) with operculum (400x); (18) oblique apical view (400x); (19) oblique ventral view (400x). 20. Ectosphaeropsis burdigalensis Londeix and Jan du Chêne 1988. Dorsal surface (300x).

Plate P16. 1–3. Diphyes ficusoides Islam 1983b; (3) with operculum in place. All (550x). 4, 5. Distatodinium apenninicum Brinkhuis et al. 1992; (4) ventral surface (500x); (5) dorsal surface (500x). 6, 7. Distatodinium biffii Brinkhuis et al. 1992. 250x. 8, 9. Dracodinium condylos (Williams and Downie 1966b) Costa and Downie 1979; (8) optical section in dorsal view (300x); (9) ventral surface in ventral view (300x). 10. Dracodinium politum Bujak et al. 1980. Optical section in dorsal view (250x). 11, 12. Dracodinium varielongitudum (Williams and Downie 1966b) Costa and Downie 1979; (11) optical section in ventral view (350x); (12) dorsal surface (300x). 13. Dracodinium waipawaense (Wilson 1967c) Costa and Downie 1979. Ventral view of dorsal surface (250x). 14. Eatonicysta furensis (Heilmann-Clausen in Heilmann-Clausen and Costa 1989) Stover and Williams 1995. Ventral surface (500x). 15. Eatonicysta pterococcoides (O. Wetzel 1933b) Sarjeant 1985b. 550x. 16–18. Eatonicysta ursulae (Morgenroth 1966a) Stover and Evitt, 1978; (17) with operculum (400x); (18) oblique apical view (400x); (19) oblique ventral view (400x). 19. Ectosphaeropsis burdigalensis Londeix and Jan du Chêne 1988. Dorsal surface (300x).