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). 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.