Figs 4A–D. Notohymena australis after protargol impregnation. A in Two Oxytrichids from the Ancient Lake Biwa, Japan, with Notes on Morphogenesis of Notohymena australis (Ciliophora, Sporadotrichida)

Figs 4A–D. Notohymena australis after protargol impregnation. A – ventral view of a representative specimen showing infraciliature and macronuclear nodules (arrows); B – ventral view of cell with two pretransverse ventral cirri (arrows), one additional ventral cirrus (doublearrowhead), and three frontal cirri (arrowheads); C – ventral view of cell, showing infraciliature, macronuclear nodules and micronuclei (arrows), buccal cirrus (arrowhead), and distal end of adoral zone (double-arrowhead); D – anterior part of specimen in dorsal view, showing dorsal kineties. AZM – adoral zone of membranelles, CC – caudal cirri, E – endoral membrane, FVC – frontoventral cirri, 1–6 – dorsal kinety 1–6, LMR – left marginal row, P – paroral membrane, PTVC– pretransverse ventral cirri, PVC– postoral ventral cirri, RMR – right marginal row, TC – transverse cirri. Scale bars: 40 μm.