Fig. 4

Early to middle morphogenetic stages of Heterodeviata nantongensis nov. sp. after protargol staining. A, B Ventral view of very early dividers, arrows in (A, B) showing oral primordium of the opisthe. C Ventral view of an early divider, arrowhead indicates the intrakinetally formed marginal anlagen and arrow denotes 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, arrow in (F) indicates uncompletely formed adoral zone of membranes, arrows and arrowheads in (G) showing the dorsal kinety anlage 1 and micronuclei, 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 in (I) showing the dorsal kinety anlage 2 develops from the proximal end of RMA2. I–IV, anlagen I–IV; DKA1, 2, dorsal kinety anlagen 1, 2; LMR1, 2, left marginal row 1, 2; LMA1, 2, 3, left marginal anlagen 1, 2, 3; Ma, macronuclear nodules; Mi, micronuclei; RMR1, 2, right marginal row 1, 2; RMA1, 2, right marginal anlagen 1, 2; UM, undulating membrane. Scale bars = 30 μm