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. Aio

Plate P1 (continued). 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).