Discocelis saleuta Vørs 1988

Aydin, Esra Elif & Lee, Won Je, 2012, Free-living Heterotrophic Flagellates from Intertidal Sediments of Saros Bay, Aegean Sea (Turkey), Acta Protozoologica 51 (2), pp. 119-137 : 125-126

Discocelis saleuta Vørs 1988 ( Figs 1k , 2j )

Observation: Cells are 4–5 μm long, disc-shaped, flattened, anteriorly concave and posteriorly convex. Two flagella emerge from a depression on the anterior margin of the cell. The recurrent flagellum trails behind the gliding cell and is 1.2–1.5 times the cell length, and the shorter flagellum is hard to see and probably beats actively and causes cell motion. Cells are with large granules. The cells glide smoothly in close contact with the substrate. Description based on observations of six cells.

Remarks: Generally, our observations are in agreement with the observations of Vørs (1988) and Larsen and Patterson (1990). This genus contains two species and Discocelis saleuta is distinguished from D. punctata Larsen et Patterson 1990 by the punctae around the cell periphery of D. punctata . Some cells in D. saleuta may lack the anterior flagellum ( Vørs 1988, Larsen and Patterson 1990, Tong et al. 1998). This species has been found at marine sites in Australia, Brazil and Fiji, and the previously reported cell length is 3 to 6 μm ( Larsen and Patterson 1990, Tong et al. 1998, Lee and Patterson 2000).

Figures

Fig. 1. a – Actinomonas mirabilis/Pteridomonas danica; b – Amastigomonas mutabilis; c – Ancyromonas micra; d – Bicosoeca conica; e – Bordnamonas tropicana; f – Caecitellus parvulus; g – Cafeteria minuta; h – Cafeteria roenbergensis; i – Cyranomonas australis; j – Developayella elegans; k – Discocelis saleuta; l – Goniomonas amphinema; m – Goniomonas pasifica; n – Kiitoksia ystava; o – Dinema platysomum; p – Anisonema acinus; q – Heteronema exaratum; r – Heteronema ovale; s – Kathablepharis remigera; t – Notosolenus canellatus; u – Massisteria marina; v – Metromonas grandis; w – Neobodo designis; x – Neobodo saliens; y – Percolomonas similis. Scale bar: 10 μm for all figures.

Fig. 2. a – Actinomonas mirabilis/Pteridomonas danica; b – Amastigomonas mutabilis; c – Ancyromonas micra; d – Bicosoeca conica; e – Caecitellus parvulus, note the mouth on the left-hand side; f – Bordnamonas tropicana; g – Cafeteria roenbergensis; h – Cyranomonas australis; i – Developayella elegans; j – Discocelis saleuta; k – Goniomonas amphinema; l – Cafeteria minuta, feeding cell; m – Anisonema acinus, dorsal view, note the ingestion organelle; n – Dinema platysomum, ventral view showing surface striations; o – Goniomonas pacifica; p – Heteronema exaratum, ventral view, general appearance of cell; q – Kathablepharis remigera; r – Massisteria marina; s – Neobodo saliens; t – Neobodo designis; u–v – Heteronema ovale, same cell; u – general appearance; v – extended cell. All micrographs are DIC images. Scale bar: 5 μm for all figures.