Eoramonas jungensis, Lee, 2019

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 : 184

Eoramonas jungensis sp. nov.

urn:lsid:zoobank.org:act:8D6AE46A-7679-4657-B09D-E12EC9AD110B

Figs 3g , 5f–h

Diagnosis: Eoramonas , cell 3–7 µm long and rigid. Two acronematic flagella insert separately by a small papilla or protrusion into small subapical depressions. Anterior flagellum beats to left direction. Moves by gliding.

Description: Cells are spherical to ovoid, 3–7 µm long, rigid and not flattened. The cells have two flagella, which are acronematic in similar length, 2–4 times the cell length. Both flagella insert into small subapical depressions or grooves. The flagella insert separately by a small papilla or protrusion about one third of the way down. The anterior flagellum slowly beats always to the left direction, and the posterior flagellum trails and beats very slowly. The nucleus is situated subapically. The cells move by gliding with the anterior flagellar beating. Frequently observed.

Remarks: Eoramonas jungensis was repored from Gippsland Basin by Lee (2015) as ‘Protist 1’. This species can be distinguished from other small gliding flagellates by the beating of the anterior flagellum to the left. Its anterior flagellum does not draw water towards the cell body, thus it does not belong to stramenopiles.

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. 5. (a) Protaspa verrucosa, note ventral groove. (b) Thaumatomastix sp., general appearance of cell and showing a layer of body scales. (c)–(d) Clautriavia cavus, general appearance of different cells, (c) cell from Lee and Patterson (2000). (e) Gweamonas unicus, note coiled flagellum and flagellar insertion. (f)–(h) Eoramonas jungensis sp. nov., showing general appearance of different cells, note flagellar insertion and beating pattern of anterior flagellum. (i)–(j) Glissandra similis, showing general appearance of different cells, note the ventral groove. (k) Phyllomitus undulans, note two flagella adhering each other, from Lee (2002a). (l)–(m) Protist 1, showing general appearance, note flagellar insertion. (n) Protist 2, showing general appearance, note collar and two emergent flagella.All micrographs are DIC images. Scale bar in (h) = 5 μm for (e)–(h) and in (n) = 10 μm for other figures.