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). 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).