Roombia truncata Okamoto et al. 2009

Lee, Won Je, 2015, Small Free-Living Heterotrophic Flagellates from Marine Sediments of Gippsland Basin, South-Eastern Australia, Acta Protozoologica 54 (1), pp. 53-76 : 63

publication ID

https://doi.org/ 10.4467/16890027AP.15.005.2192

DOI

https://doi.org/10.5281/zenodo.12522299

persistent identifier

https://treatment.plazi.org/id/0B708784-E669-8925-FF17-FC7825DED5B6

treatment provided by

Felipe

scientific name

Roombia truncata Okamoto et al. 2009
status

 

Roombia truncata Okamoto et al. 2009 ( Figs 1h View Fig , 3g –h View Fig )

Observation: Cells are oblong, 11 to 16 µm long, laterally flattened, and rigid. There are no surface structures on both faces of the cell. Two flagella arise near the anterior-lateral side of the cell separately by a small protrusion. Both flagella are of similar length and not acronematic. The anterior flagellum beats backwardly in a small excursion and the posterior flagellum is usually held down. The nucleus is located in the centre of the cell. The cells appear to move by skidding. When the cells rest, the anterior flagellum lies along the margin of the cell. Rarely observed.

Remarks: This species was reported from a marine habitat in Nova Scotia, Canada by Okamoto et al. (2009). It is similar to Platychilomonas , but is distinguished by the flagellar orientation and the lack of the gullet, and because this species lacks rows of extrusomes. It can be distinguished from other small flagellates by the moving behaviour and the cell appearance such as flatness and lack of surface structure. This species was also observed at marine sediments in subtropical Australia and Korea (Lee unpublished data).

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