Cercomonas sp.1

Lee, Won Je, 2019, Small Free-Living Heterotrophic Flagellates from Marine Intertidal Sediments of the Sydney Region, Australia, Acta Protozoologica 58 (4), pp. 167-189 : 181

Cercomonas sp.1

Figs 3c , 4c–d

Description: Cercomonas . Cells are 7–15 µm long and flexible. The cells are slender; narrow towards the posterior end which is somewhat elliptical. The cells have one flagellum; the second flagellum is not seen. The flagellum arises from the anterior end of the cell and is about the cell length, and its tip is thin at two third from its base. The cells have a ventral groove. When moving, pseudopodia move backwards and the strands of cytoplasm are drawn out from the posterior end of the cell. Some food materials are seen under the cell surface. The cells move by gliding.

Remarks: Cercomonas sp.1 is tentatively assigned to Cercomonas although it has only one flagellum. This species can be distinguished from the species in Cercomonas that have two flagella by having only one flagellum and the slender cell shape.

Figures

Fig. 3. Apusomonadida, Cercomonadida, Protaspidae, Thaumatomonadidae and Protista incertae sedis. (a) Apusomonas proboscidea, (b) Cercomonas parva, (c) Cercomonas sp.1, (d) Cercomonas sp.2, (e) Protaspa flexibilis sp. nov., (f) Thaumatomastix sp., (g) Eoramonas jungensis sp. nov., (h) Gweamonas unicus, (i) Phyllomitus undulans (from Lee 2002a), (j) Protist 1, (k) Protist 2. Scale bar = 10 μm for all figures.

Fig. 4. (a)–(b) Rhynchobodo longiciliatus, (a) general appearance of cell, (b) flagellar insertion into pocket. (c)–(d) Cercomonas sp.1, general appearance, note slender anterior part and hyaline cell body. (e)–(f) Cercomonas parva, (e) genera appearance showing a posterior fla- gellum attached to the body, (f) flexible body. (g)–(h) Cercomonas sp.2, general appearance, note both short flagella and cytoplasms drawn from the posterior part. (i) Cyranomonas australis, showing general appearance of different cells, note flagellar insertion. (j)–(k) Protaspa flexibilis sp. nov., general appearance of different cells, (j) nuclear caps around nucleus. All micrographs are DIC images. Scale bar in (k) = 10 μm for all figures with the exception of (b). Scale bar in (b) = 5 μm.