Plate P1. Illustrations of taxa, sample, and slide number. Scale bar = ~20 µm unless stated otherwise. Scanning electron microscope (SEM) photographs have varying scale bars. 1. Adnatosphaeridium multispinosum (Sample 189-1172D-15R-3, 40-42cm) (1). 2. Aiora fenestrata (Sample 189-1172D-15R-3, 40-42cm) (1); scale bar = ~15 µm. 3, 4. Aireiana verrucosa (Sample 189-1172A-39X-5, 55-57 cm) (1). 5-7. Alisocysta circumtabulata; (5) Sample 189-1172A-46X-2, 85-87 cm (1). (6, 7) Sample 189-1172D-21R-4, 15-18 cm (1); scale bar = ~15 µm. 8, 9. Alisocysta margarita (Sample 189-1172D-16R-2, 40-42 cm) (1); scale bar = ~15 µm. 10, 11. Alisocysta reticulata group (Sample 189-1172D-20R-1, 40-42 cm) (1); scale bar = ~15 µm. 12. Alisocysta reticulata group (Cassidium fragile) (Sample 189-1172D-20R-5, 40-43 cm) (1); scale bar = ~10 µm. 13. Alterbidinium acutulum (Sample 189-1172D-24R-5, 130-133 cm) (1); scale bar = ~15 µm. 14. Alterbidinium distinctum (Sample 189-1172A-39X-4, 85-87 cm) (2). 15-17. Arachnodinium antarcticum (Sample 189-1172A-48-3, 85-87 cm) (1). 18, 19. Batiacasphaera cassicula (Sample 189-1172D-10R-1, 40-42 cm) (1). 20-22. Brigantedinium? sp. (Sample 189-1172A-39X-3, 128-130 cm) (2); scale bar = ~15 µm. Note periphragm delineating long slender antapical horns. 23. Brigantedinium spp. (Sample 189-1172A-6H-4, 85-87 cm) (2); scale bar = ~15 µm. Specimen from the Quaternary; compare with Brigantedinium? sp. 24. Cerebrocysta bartonensis (Sample 189-1172A-49X-4, 85-87 cm) (1); scale bar = ~15 µm. 25-28. Cerodinium sp. A; (25-27) Sample 189-1172D-24R-5, 67-69 cm (2); note elongated endocyst and short antapical horns; (28) Sample 189-1172D-24R-5, 130-133 cm (1); this specimen is somewhat comparable to Cerodinium diebelii, but lacks the longer antapical horns typical for that species. 29. Cerodinium dartmooria (Sample 189-1172D-19R-3, 40-42) cm (1). 30, 31. Cerodinium speciosum; (30) Sample 189-1172D-20R-7, 40-42 cm (1); (31) Sample 189-1172D-21R-3, 40-42 cm (1). 32, 33. Cerodinium striatum (Sample 189-1172D-24R-5, 36-38 cm) (1). 34, 35. Charlesdowniea edwardsii group (Sample 189-1172D-11R-5, 40-42 cm) (1). 36. Cleistosphaeridium diversispinosum (Sample 189-1172D-14R-1, 40-42 cm) (2). 37-39. Cleistosphaeridium placacanthum (Sample 189-1172D-8R-6, 40-42 cm) (2). 40-42. Cordosphaeridium fibrospinosum group (Sample 189-1172D-5R-1, 40-42 cm) (1). 43. Corrudinium sp. Goodman and Ford, 1983 (Sample 189-1172A-39X-5, 85-87 cm) (1). 44-47. Cribroperidinium sp. A; (44, 45) Sample 189-1172A-46X-2, 85-87 cm (1); (46, 47) Sample 189-1172D-12R-1, 40-42 cm (1). 48. Cribroperidinium sp. A (Sample 189-1172D-12R-1, 40-42 cm) (1). 49-52. Deflandrea antarctica group; (49) Sample 189-1172A-39X-6, 85-87 cm (1); (50) Sample 189-1172A-52X-5, 85-87 cm (1); (51, 52) Sample 189-1172D-3R-1, 40-42 cm (1). 53-59. Deflandrea convexa group; (53) Sample 189-1172D-5R-1, 40-42 cm (1); (54, 55). Sample 189-1172D-5R-1, 40-42 cm (2); (56, 57) Sample 189-1172D-5R-1, 40-42 cm (1); (58, 59) Sample 189-1172D-8R-6, 40-42 cm (1). 60. Deflandrea phosphoritica group (Sample 189-1172A-39X-4, 10-12 cm) (1). 61-63. Deflandrea sp. A; (61) Sample 189-1172A-39X-4, 74-76 cm (1); note triangular endophragm; (62) Sample 189-1172A-39X-4, 74-76 cm) (2); (63) Sample 189-1172A-39X-4, 74-76 cm) (1). 64, 65. Dinopterygium sp. A (Sample 189-1172D-24R-5, 130-133 cm) (1). 66. Dracodinium waipawaense (Sample 189-1172D-13R-2, 40-42 cm) (1). 67-69. Enneadocysta partridgei; (67) Sample 189-1172A-39X-5, 105-107 cm (1); (68, 69) Short processes (Areosphaeridium ebdonii-style) (Sample 189-1172A-40X-2, 70-72 cm) (1); such variations are considered environmentally controlled. 70. Eocladopyxis peniculata (Sample 189-1172A-48X-4, 108-110 cm (1). 71, 72. Glaphyrocysta spp. (Core 189-1172D-22R). 73. Glaphyrocysta spp. (Core 189-1172D-22R). 74. Histiocysta sp. (Sample 189-1172A-46X-2, 85-87 cm) (1). 75, 76. Homotryblium tenuispinosum (Sample 189-1172A-40X-2, 70-72 cm) (1). 77. Hystrichokolpoma rigaudiae, 189-1172D-11R-5, 40-42 cm (1). 78-83. Hystrichokolpoma truncatum (78) Sample 189-1172A-54X-8, 85-87 cm) (1); scale bar = ~15 µm; (79, 80) Sample 189-1172D-11R-5, 40-42 cm (1); scale bar = ~15 µm; 81-83. Sample 189-1172D-5R-1, 40-42 cm (1); scale bar = ~15 µm. 84. Hystrichosphaeridium truswelliae (Sample 189-1172D-16R-2, 40-42 cm) (1). 85-87. Hystrichosphaeridium truswelliae (Sample 189-1172D-20R-5, 40-43 cm) (1). 88, 89. Hystrichosphaeridium tubiferum (Sample 189-1172D-20-5, 40-43 cm) (1). 90, 91. Hystrichosphaeropsis sp. (Sample 189-1172D-16R-2, 40-42 cm) (1). 92, 93. Impagidinium cassiculum (Sample 189-1172D-14R-1, 40-42 cm) (1). 94, 95. Impagidinium dispertitum (Sample 189-1172D-8R-6, 40-42 cm) (1). 96. Impagidinium maculatum (Sample 189-1172D-14R-1, 40-42 cm) (1). 97, 98. Impagidinium victorianum (Sample 189-1172A-39X-5, 105-107 cm) (1). 99. Lejeunecysta sp. (Sample 189-1172A-39X-6, 55-57 cm) (1). 100-104. Manumiella druggii; (100, 101) Sample 189-1172D-24R-5, 130-133 cm (1); (102-104) Sample 189-1172D-24R-5, 73-75 cm) (1). 105, 106. Membranophoridium perforatum; (105) Sample 189-1172D-12R-3, 85-87 cm (1); (106) Sample 189-1172D-12R-7, 40-42 cm (1). 107, 108. Octodinium askiniae (Sample 189-1172A-39X-6, 105-107 cm) (1). 109, 110. Operculodinium? sp. A (Sample 189-1172D-24R-5, 130-133 cm) (1); scale bar = ~15 µm; see also SEM imagery. 111, 112. Palaeocystodinium sp. (Sample 189-1172D-24R-5, 30-32 cm (1); (111) scale bar = ~30 µm; (112) close to Andalusiella. 113-116. Palaeoperidinium pyrophorum (Sample 189-1172D-24R-5, 36-38 cm) (1). 117. Paucisphaeridium sp. (Sample 189-1172A-39X-4, 14-16 cm) (1); scale bar = ~10 µm. 118, 119. Schematophora obscura (Sample 189-1172D-13R-6, 40-42 cm) (1). 120. Schematophora speciosa (Sample 189-1172A-39X-5, 55-57 cm) (1); scale bar = ~15 µm. 120. Schematophora speciosa (Sample 189-1172A-39X-5, 55-57 cm) (1); scale bar = ~15 µm. 121, 122. Schematophora speciosa (Sample 189-1172A-39X-5, 55-57 cm) (1); scale bar = ~15 µm. 123. Selenopemphix nephroides (Sample 189-1172A-39X-5, 85-87 cm) (1). 124, 125. Senegalinium bicavatum (Sample 189-1172D-24R-5, 30-32 cm) (1). 126-129. Senoniasphaera inornata (126-128) Sample 189-1172D-24R-5, 12-14 cm (1); (129) Sample 189-1172D-24R-5, 36-38 cm (1). 130. Spinidinium luciae (Sample 189-1172A-39X-5, 55-57 cm) (1). 131, 132. Spinidinium macmurdoense; (131) Sample 189-1172A-39X-5, 105-107 cm (1); (132) Sample 189-1172A-39X-6, 105-107 cm (1). 133-135. Spiniferites sp. A (Sample 189-1172D-24R-5, 130-133 cm) (2). 136. Spiniferites sp. B (Sample 189-1172A-47X-4, 85-87 cm) (1). 137, 138. Stoveracysta kakanuiensis (1); (137) Sample 189-1172A-39X-3, 122-124 cm; (138) Sample 189-1172A-39X-3, 145-147 cm. 139-141. Trithyrodinium evittii (Sample 189-1172D-24R-5, 12-14 cm) (1). 142. Turbiosphaera filosa (Sample 189-1172A-39X-4, 10-12 cm) a (1). 143. Vozzhennikovia apertura (Sample 189-1172A-39X-4, 85-87 cm) (1). 144. Alisocysta circumtabulata (Sample 189-1172D-23R-1, 41-43 cm) (SEM). 145. Alisocysta circumtabulata (Sample 189-1172D-23R-1, 41-43 cm) (SEM). 146. Alisocysta reticulata (Sample 189-1172D-23R-1, 41-43 cm) (SEM). 147. Alterbidinium sp. (Sample 189-1172D-24R-5, 40-42 cm) (SEM). 148, 149. Cerebrocysta spp. (148) Sample 189-1172D-3R-4, 40-42 cm (SEM); (149) Sample 189-1172A-39X-4, 40-42 cm (SEM). 150. Cerodinium dartmoorium (Sample 189-1172D-23R-1, 41-43 cm. 151-153. Cerodinium sp. A (Sample 189-1172D-29R-5, 40-42 cm) (SEM) (153: detail). 154. Cleistosphaeridium spp. (Sample 189-1172D-12R-7, 40-42 cm) (SEM) 155. Corrudinium incompositum (Sample 189-1172A-39X-3, 138-140 cm) (SEM). 156. Corrudinium sp. Goodman and Ford, 1983 (Sample 189-1172A-39X-3, 138-140 cm) (SEM). 157-160. Deflandrea antarctica (SEM); (157) Sample 189-1172D-12R-7, 40-42 cm; (158) Sample 189-1172D-3R-4, 40-42 cm; (159) Sample 189-1172A-39X-3, 48-50 cm; (160) Sample 189-1172A-39X-4, 147-149 cm. 161. Deflandrea convexa (Sample 189-1172D-12R-7, 40-42 cm) (SEM). 162-164. Dinopterygium sp. A (Sample 189-1172D-29R-5, 40-42 cm) (SEM) (162) lateral antapical view; (163) oblique apical view. 165-168. Dracodinium waipawaense (Sample 189-1172D-12R-7, 40-42 cm) (SEM). 169. Eisenackia crassitabulata (here part of Alisocysta reticulata group) (Sample 189-1172D-29R-5, 40-42 cm) (SEM). 170, 171. Enneadocysta sp. A (Sample 189-1172D-3R-4, 40-42 cm) (SEM). 172. Enneadocysta partridgei (Sample 189-1172A-39X-4, 147-149 cm) (SEM). 173, 174. Eocladopyxis sp. (Sample 189-1172D-12R-7, 40-42 cm) (SEM); (174) note hollow processes, penetrating endophragm. 175-180. Glaphyrocysta spp. (Sample 189-1172D-23R-1, 41-43 cm) (SEM); (178) detail archaeopyle margin; (180) operculum. 181. Histiocysta sp., (possibly Microdinium) (Sample 189-1172D-23R-1, 41-43 cm) (SEM). 182. Hystrichokolpoma spinosum (Sample 189-1172D-12R-7, 40-42 cm) (SEM). 183-185. Hystrichosphaeridium truswelliae (SEM); (183) Sample 189-1172D-3R-4, 40-42 cm (operculum); (184, 185) Sample 189-1172D-23R-1, 41-43 cm; (185: detail antapical processes). 186. Impagidinium cassiculum (Sample 189-1172D-12R-7, 40-42 cm) (SEM). 187. Impagidinium dispertitum (Sample 189-1172A-39X-4, 147-149 cm) (SEM). 188. Impagidinium spp. (Sample 189-1172D-3R-4, 40-42 cm) (SEM). 189. Manumiella druggii transition to Manumiella rotundata (Sample 189-1172D-29R-5, 40-42 cm) (SEM). 190-192. Operculodinum? sp. A (Sample 189-1172D-24R-5, 40-42 cm) (SEM). 193. Operculodinum? sp. A (Sample 189-1172D-24R-5, 40-42 cm) (SEM). 194-196. Operculodinium spp. (SEM); (194) Sample 189-1172D-23R-1, 41-43 cm; (195, 196) Sample 189-1172A-39X-4, 147-149 cm. 197. Palaeocystodinium spp. (Sample 189-1172D-23R-1, 41-43 cm) (SEM). 198-200. Paucisphaeridium spp. (Sample 189-1172D-3R-4, 40-42 cm) (SEM). 201. Phthanoperidinium echinatum (Sample 189-1172A-39X-3, 138-140 cm) (SEM). 202-204. Senegalinium dilwynense (Sample 189-1172D-23R-1, 41-43 cm) (SEM); (202) ventral view; (203) dorsal view; (204) Senegalinium dilwynense (right) and Diconodinium sp., (left). 205, 206. Spinidinium spp. (Sample 189-1172D-12R-7, 40-42 cm) (SEM). 207. Spinidinium luciae (Sample 189-1172A-39X-6, 122-124 cm) (SEM). 208, 209. Spinidinium macmurdoense (Sample 189-1172A-39X-6, 122-124 cm) (SEM). 210. Turbiosphaera filosa (Sample 189-1172A-39X-3, 48-50 cm) (SEM). 211. Vozzhennikovia apertura (Sample 189-1172D-3R-4, 40-42 cm) (SEM). 212. Vozzhennikovia? spp. (Sample 189-1172A-39X-3, 138-140 cm) (SEM); note 3I archaeopyle. 213. Vozzhennikovia spp. (Sample 189-1172A-39X-3, 138-140 cm) (SEM).

Plate P1. Illustrations of taxa, sample, and slide number. Scale bar = ~20 µm unless stated otherwise. Scanning electron microscope (SEM) photographs have varying scale bars. 1. Adnatosphaeridium multispinosum (Sample 189-1172D-15R-3, 40-42cm) (1). 2. Aiora fenestrata (Sample 189-1172D-15R-3, 40-42cm) (1); scale bar = ~15 µm. 3, 4. Aireiana verrucosa (Sample 189-1172A-39X-5, 55-57 cm) (1). 5-7. Alisocysta circumtabulata; (5) Sample 189-1172A-46X-2, 85-87 cm (1). (6, 7) Sample 189-1172D-21R-4, 15-18 cm (1); scale bar = ~15 µm. 8, 9. Alisocysta margarita (Sample 189-1172D-16R-2, 40-42 cm) (1); scale bar = ~15 µm. 10, 11. Alisocysta reticulata group (Sample 189-1172D-20R-1, 40-42 cm) (1); scale bar = ~15 µm. 12. Alisocysta reticulata group (Cassidium fragile) (Sample 189-1172D-20R-5, 40-43 cm) (1); scale bar = ~10 µm.