Figs 2a–m. Arcuospathidium bromelicola from life. a, b – left side and ventral view, showing body outline of a specimen with strongly convex oral bulge (arrowheads); c – oral bulge extrusomes (some marked by arrowheads) are rod shaped and about 4 × 0.3 µm in size; d – a pillar of a squashed cyst; e – bright field micrograph of a resting cyst in optical section, showing the thin external layer (arrow) and thick internal layer (opposed arrowheads); f–h – optical section of cyst pillars, showing the variability of the distal end; i, j – optical section and surface view, showing the narrowly spaced pillars; k – arrowheads mark overturned pillars in a squashed cyst; l, m – optical sections, showing the cysts filled with lipid droplets and surrounded by a narrow slime layer. CV – contractile vacuole, L – lipid droplets, MA – macronucleus, SL – slime layer. Scale bars: 2.5 µm (f–h), 10 µm (c), 15 µm (e, i, j, l, m), and 40 µm (a, b).