Figs 5A–G. 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 5A–G. Notohymena australis after protargol impregnation. A – ventral view of an early divider, showing oral primordium; B, C – ventral (B) and dorsal (C) view of the same middle divider, showing the formation of frontal-ventral-transverse cirral anlagen in proter and opisthe, and anlagen of marginal rows (arrows), dedifferentiation of anterior end of undulating membranes (arrowheads), and undulating membrane anlagen in opisthe (double-arrowhead); D, E – ventral infraciliature of two middle dividers, showing frontal-ventral-transverse cirral anlagen beginning to organize into new cirri from anterior (arrowheads) and a small anlage separating from anterior right end of undulating membrane anlagen (arrows), insets: fused macronucleus; F, G – ventral (B) and dorsal (C) view of the same late divider, showing the formation of anlgen of dorsomarginal kineties at anterior right end of right marginal rows anlagen (arrows in F), frontal-ventral-transverse cirral anlagen II – VI segregating into 3, 3, 3, 4 and 4 cirri, the leftmost frontal cirrus originated from undulating membranes anlagen (arrowheads), and development of dorsal kinety anlagen (arrows in G). 1–4 – dorsal kinety 1–4, LMA – anlage of left marginal row, OP – oral primordium, RMA – anlagen of right marginal row. Scale bars: 40 μm.