FIGURE 4. Frontonia multinucleata n in Taxonomic studies on three marine species of Frontonia from northern China: F. didieri n. sp., F. multinucleata n. sp. and F. tchibisovae Burkovsky, 1970 (Ciliophora: Peniculida)

FIGURE 4. Frontonia multinucleata n. sp. from living cells (A, B), after silver nitrate (C, F, H, K), silver carbonate (I, J) and protargol (D, E, G) impregnations. (A, B) Ventral views of typical specimens. (C) Dorsal view, to show the contractile vacuole pore (arrowhead). (D, E) Side views, to show the fibers connected with the buccal and postoral suture area. Note the contractile vacuole is near the dorsal side. (F) Detailed structure of the peniculus 3. (G) To show the different situation of the macronuclear nodules. (H) The oral apparatus, note the two-rowed paroral membrane (PM) and the vestibular kineties (VK), in which the anterior part consists of monokinetids. (I, J) The infraciliature of ventral and dorsal (ventral-to-dorsal) side of the same specimen, to show the postoral suture (arrows in I and J), and the contractile vacuole. (K) Ventral view, note the long cytopyge (arrowheads). SL = silver line. Scale bars = 30 µm