Hemistasia phaeocysticola ( Scherffel 1900 ) Elbrächter et al. 1996

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 : 57

publication ID

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

DOI

https://doi.org/10.5281/zenodo.12522264

persistent identifier

https://treatment.plazi.org/id/0B708784-E667-892A-FCA3-FAD02447D107

treatment provided by

Felipe

scientific name

Hemistasia phaeocysticola ( Scherffel 1900 ) Elbrächter et al. 1996
status

 

Hemistasia phaeocysticola ( Scherffel 1900) Elbrächter et al. 1996 ( Figs 2h–i View Fig )

Observation: Cells are oblong, 27 to 33 µm long, less metabolic, and are not flattened with a spiral groove. The cells form a constant shape (oblong) rather than highly metabolic, and form a flexible anterior papillum containing a tubular ingestion organelle. The nucleus is located in the centre of the cell. There are small particles throughout the cell. The posterior flagellum is slightly longer than the anterior flagellum and the cell. During swimming the cells rotate. Two cells were observed.

Remarks: This species has been reported from marine sites in Australia, Germany, Wadden Sea and Korea, with cell lengths of 12–25 µm ( Scherffel 1900; Griessmann 1913; Elbrächter et al. 1996; Tong et al. 1998; Lee and Patterson 2000; Al-Qassab et al. 2002; Lee 2002b, 2006b). The genus Hemistasia resembles Entomosigma , Rhynchobodo and Cryptaulax . The latter two genera have been synonymised ( Bernard et al. 2000). Hemistasia is very similar to Rhynchobodo , but can be distinguished by its anterior papillum. The cells observed here are similar to Rhynchobodo thiophila sensu Skuja 1956 in cell length and general appearance, but can be distinguished by the presence of the flexible anterior papillum.

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