Neobodo curvifilus (Greissmann 1913) Moreira et al. 2004

Aydin, Esra Elif & Lee, Won Je, 2022, Free-living Heterotrophic Flagellates Lakes in Turkey (Protista) from Two Hypersaline, Acta Protozoologica 61, pp. 85-98 : 90

Neobodo curvifilus (Greissmann 1913) Moreira et al. 2004 ( Figs 2b , 3h )

Cells are 8–10 µm long and bean shaped. Two flagella insert subapically: one extends anteriorly and the other one extends posteriorly. The anterior flagellum is curved inward at the tip and the acronematic posterior flagellum is about 2.5 times the cell length. The cells move by gliding. Description is based on the observations of 13 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 description shows compatibility with Lee and Patterson (2000). Neobodo curvifilus is distinguished from other species of Neobodo and Bodo by the curved shape and the paddling beat of the anterior flagellum. This species has similar features with Bordnamonas tropicana Larsen and Patterson 1990 , but it can be distinguished by its much curved anterior flagellum, the acronematic posterior flagellum, quick movement, and by the visible mouth. A detailed discussion of Neobodo curvifilus is given in Tikhonenkov et al. (2016), in which the similarities of N. curvifilus with Procryptobia sorokini Frolov et al. 2001 and Parabodo caudatus are discussed. Procryptobia sorokini and N. curvifilus resemble in general cell shape, cell length, having curved shape and paddling beat of anterior flagellum. The morphological differences mentioned by Frolov et al. (2001) are not enough to differ these two species because Neobodo curvifilus was also reported with an attached posterior flagellum. We are of the view that Procryptobia sorokini is a junior synonym of Neobodo curvifilus . Parabodo caudatus and N. curvifilus also resemble each other. Compared to N. curvifilus , Parabodo caudatu s is more plastic and bigger. The anterior flagellum of P. caudatus beats with a paddling motion over the cell, while the anterior flagellum of N. curvifillus makes a movement like that of a beckoning index finger, as reported by Lee et al. (2003). Furthermore, P. caudatus has a prominent apical mouth and N. curvifilus also has a visible mouth, not prominent ( Lee et al. 2003, 2005). Neobodo curvifilus has been described in marine sites in Antarctica, Arctic, north Atlantic, northeast Atlantic, Australia, Denmark, West Greenland and Norway, with cell lengths ranging from 4 to 12 μm mostly under the name of Bodo curvifilus ( Griessmann 1913, Throndsen 1969, Turley and Carstens 1991; Vørs 1992a, b; Patterson et al. 1993, Tong et al. 1997, Lee 2015).

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.