Fig. 3

Early to middle morphogenetic stages of Heterodeviata nantongensis nov. sp. after protargol staining. A Ventral view of very early dividers, arrow showing oral primordium of the opisthe and arrowheads showing macronuclear nodules. B Arrowheads indicate micronuclei and arrow denotes oral primordium of the opisthe. C Ventral view of an early divider, arrowhead showing the intrakinetally formed marginal anlagen and arrow indicates several newly formed adoral zone of membranes. D, E Ventral views of early divider, arrowheads and arrows in (D, E) separately indicate the marginal anlagen and developed oral primordia. F, G Ventral (F) and dorsal (G) view of the same early divider, arrowhead in (F) indicates incompletely formed adoral zone of membranes and arrowheads in (G) showing the dorsal kinety anlage 1, in this stage, anlagen I–IV of the proter and opisthe formed. H, I Ventral (H) and dorsal (I) view of the same early-middle divider, arrowheads in (H) showing the freshly formed anlage V of the proter and opisthe, arrowheads and arrows in (I) showing the dorsal kinety anlage 2 develops from the proximal end of RMA2 and the micronuclei, separately. I–IV, anlagen I–IV; DKA1, 2, dorsal kinety anlagen 1, 2; FVC, frontoventral cirri; LMA1, 2, 3, left marginal anlagen 1, 2, 3; LMR1, left marginal row 1; Ma, macronuclear nodules; RMA1, 2, right marginal anlagen 1, 2; RMR1, right marginal row 1; UM, undulating membrane. Scale bars = 35 μm (F, G), 30 μm (H, I)