Paracercomonas minima ( Mylnikov, 1985 ) Bass &, 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

8. Paracercomonas minima ( Mylnikov, 1985) Bass &

Cavalier-Smith, 2009 ( Fig. 3g -i )

Basionym. Cercobodo minima Mylnikov, 1985

Material examined. Korea, Gangwon-do , Yangyang-gun, Ssangcheon Stream (38°09′33.6″N, 128°36′27.3″E), 21 Oct 2017, collected by Won Je Lee.

Description. Cells are 5-9 μm, often still and metabolic. The anterior flagellum is about the cell length and acronematic, and waves quite slowly along the entire length of the flagellum. The posterior flagellum is 1-1.5 times the cell length. Branched, finger-like or filose cytoplasmic strand is always present. Finger-like, bulbous, lamellar, fi- lose-branching pseudopodia are almost always present all around the cell. One contractile vacuole is laterally posi- tioned ( Fig. 3g ). Cysts are spherical ( Fig. 3i ). This species is slightly smaller than P. marina .

Previously reported cell length. 5-9 μm ( Mylnikov, 1985; Bass et al., 2009).

Habitat. Freshwater sediments, soils.

World distribution. UK, Sweden, Chile, New Zealand, Argentina, Panama ( Bass et al., 2009), Russia ( Mylnikov, 1985), Korea.

Deposition. National Institute of Biological Resources, Korea (NIBRPR0000109248).

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.