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). 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).