FIG. 2. A–M in Antarctic population of Anteholosticha sigmoidea (Foissner, 1982) Berger, 2003 (Ciliophora: Urostylidae) with notes on its phylogenetic position

FIG. 2. A–M. Anteholosticha sigmoidea, an Antarctic population from life (A–G) and after protargol preparation (H–M). A, B. Ventral and dorsal view of a representative specimen. C–E. Contractile vacuole with collecting canals. F. Arrows indicate macronuclear nodules, arrowheads mark micronuclei. G. Dorsal cilia (arrows) and cortical granules (arrowheads). H, I. Infraciliature of ventral (H) and dorsal (I) side, arrows indicate the basal bodies at the top of the right marginal row. J. Ventral view of the ciliature in an anterior body portion. K. Macronuclear nodules and micronuclei. L, M. Arrangement of cortical granules on ventral (L) and dorsal (M) surface. AZM, adoral zone of membranelles; BC, buccal cirrus; CV, contractile vacuole; FTC, frontoterminal cirri; LMR, left marginal cirral row; Ma, macronuclear nodules; Mi, micronucleus; MP, midventral pairs; RMR, right marginal cirral row; PTC, pretransverse cirri; TC, transverse cirri; 1–4, dorsal kineties 1–4. Scale bars, 50 μm.