Carpediemonas membranifera ( Larsen and Patterson 1990 ) Ekebom et al. 1996

Aydin, Esra Elif & Lee, Won Je, 2022, Free-living Heterotrophic Flagellates Lakes in Turkey (Protista) from Two Hypersaline, Acta Protozoologica 61, pp. 85-98 : 93

Carpediemonas membranifera ( Larsen and Patterson 1990) Ekebom et al. 1996 ( Figs 2d , 3g )

Cells are 6–7.5 μm long and elliptical with a longitudinal ventral groove extending to the posterior end of the cell. Two flagella unequal in length are emerging anteriorly; the anterior flagellum bent over backwards is as long as the cell and beating stiffly. The acronematic posterior flagellum is 2.5–4 times the cell length, beating actively and usually lying in the depression. Description is based on the observations of 7 cells. Occurance: every month at Acı Lake, temperature 1–23.5 °C, salinity 24–67.5 psu, dissolved oxygen 3.75–13.2 mg /L.

Remarks: The species was first described as Percolomonas membranifera by Larsen and Patterson (1990) but later renamed as Carpediemonas by Ekebom et al. (1996) since non-dividing cells of this species were observed with two flagella. Our observations are consistent with the description of Ekebom et al. (1996). It has a relatively long posterior flagellum, moves by skidding with the anterior flagellum beating in a paddling motion. This species is distinguished from Kipferlia bialata (Ruinen 1938) Kolisko et al. 2010 and from Ergobibamus cyprinoides ( Park et al. 2010) by its smaller size, by the absence of the moving membrane and relatively longer posterior flagellum. Carpediemonas membranifera has been described in marine sites of Australia, Brazil, Korea and Rusia (White Sea) with the previously reported size range from 3 to 9 µm ( Larsen and Patterson 1990, Ekebom et al. 1996, Simpson and Patterson 1999, Bernard et al. 2000, Lee and Patterson 2000, Al-Qassab et al. 2002; Lee 2002, 2019; Tikhonenkov et al. 2006).

Figures

Fig. 2. (a) Ancyromonas sigmoides, (b) Neobodo curvifilus, (c) Chelonemonas sp., (d) Carpediemonas membranifera, (e) Caecitellus parvulus, (f) Codosiga botrytis, (g) Cafeteria roenbergensis, (h) Pleurostomum flabellatum, (i) Rhynchomonas nasuta, (j) Salpingoeca marina, (k) Pendulomonas adriperis, (l) Neobodo saliens, (m) unidentified protist, (n) Neobodo designis, (o) Monosiga brevicollis, (p) Halocafeteria seosinensis, (q) Cantina marsupialis.

Fig. 3. (a) Ancyromonas sigmoides, (b) Caecitellus parvulus, (c) Cafeteria roenbergensis, (d) Cantina marsupialis, (e) Chelonemonas sp., (f) Codosiga botrytis, (g) Carpediemonas membranifera, (h) Neobodo curvifilus, (i) Neobodo designis, (j) Neobodo saliens, (k) unidentified protist, (l)-(m) Pleurostomum flabellatum, (n) Rhyncomonas nasuta, (o) Monosiga brevicollis, (p) Salpingoeca marina, (q) Pendulomonas adriperis, (r) Halocafeteria seosinensis. All micrographs are DIC images. Scale bar in (k) represents for all figures.