Paracercomonas producta Howe & Cavalier-Smith,, 2009

Lee, Won Je, 2020, First records of nine free-living heterotrophic flagellates from South Korea, Journal of Species Research 9 (4), pp. 448-454 : 452-453

9. Paracercomonas producta Howe & Cavalier-Smith,

2009 ( Fig. 3j -o )

Material examined. Korea, Gangwon-do , Yangyang-gun, Namdaechun-river (38°04′39″N, 128°37′55″E), 21 Oct 2017, collected by Won Je Lee.

Description. Cells are 6.1-9.9 (avg. 7.6) μm long and very metabolic. The anterior flagellum is slightly longer than the cell and the posterior flagellum is 1-1.5 times the cell length. Cytoplasmic strand is long and very often present ( Fig. 3j-3o , arrowheads). Lamellar, bulbous, finger-like, filose and branched pseudopodia are seen all around the cell, almost always present. The nucleus is located in the anterior part of the cell. One contractile vacuole is near the middle of the cell, but often near the left or right side of the cell ( Fig. 3j, 3l-3o ). The cells glide slowly on the substrate.

Previously reported cell length. 4-9 μm ( Lara et al., 2007; Bass et al., 2009).

Habitat. Freshwater sediments, soils.

World distribution. UK ( Bass et al., 2009), Spain ( Lara et al., 2007), Korea.

Deposition. National Institute of Biological Resources, Korea (NIBRPR0000109268).

Identifiers. Won Je Lee.

Figures

Fig. 3. (a)-(f) Paracercomonas astra, showing general appearance, contractile vacuole (CV) and cytoplasmic strand (arrowheads). (a) cell 1, (b) cell 2, (c)-(f) cell 3. (g)-(i) Paracercomonas minima, (g) cell 1 showing CV, (h) cell 2, (i) cysts. (j)-(o) Paracercomonas producta, showing general appearance, contractile vacuole and cytoplasmic strand (arrowheads). (j) three different cells, (k) cell 1, (l) cell 2, (m) cell 3, (n), (o) cell 4. AF: anterior flagellum, PF: posterior flagellum.All micrographs are DIC images. Scale bar=5 μm for all figures.