Notosolenus hemicircularis Lee & Patterson, 2000

Lee, Won Je, 2020, First records of nine free-living heterotrophic flagellates from South Korea, Journal of Species Research 9 (4), pp. 448-454 : 449

1. Notosolenus hemicircularis Lee & Patterson, 2000

( Fig. 1a -f )

Material examined. Korea, Gangwon-do , Uljin-gun, Bongpyung Beach (37°02′37″N, 129°24′47″E), 22 Oct 2017, collected by Won Je Lee.

Description. Phagotrophic euglenid. Cells are 9-11.8 μm long, ventrally flattened and dorsally convex. There is a hyaline semicircular collar ( Fig. 1a , arrowhead) around the short anterior neck ( Fig. 1c, 1e , arrowheads). The cells have five dorsal ridges running along the cell ( Fig. 1b, 1d ). On the ventral side there are three fine ridges. The right and left ventral ridges arise at the neck. The left ventral ridge curves slightly from the anterior to the posterior forming an arc. The mid-ventral ridge arises from a small protrusion near the anterior end of the cell. Two flagella are unequal in length and are slightly thickened. The anterior flagellum is 1.2-1.3 times the cell length and the re- current posterior flagellum is 0.6-1.0 times the cell length ( Fig. 1e ). The flagellar reservoir lies anteriorly in the right hand side of the cell ( Fig. 1f , arrow) and the nucleus in the left hand side ( Fig. 1a ). The cells move by gliding.

Previously reported cell length. 9-10 μm ( Lee and Patterson, 2000).

Habitat. Marine intertidal sediments.

World distribution. Australia ( Lee and Patterson, 2000), Korea.

Deposition. National Institute of Biological Resources,

Korea (ZCIVEG0000000002).

Identifiers. Won Je Lee.

Figures

Fig. 1. (a)-(f) Notosolenus hemicircularis. (a), (b) cell 1 showing general appearance, (a) note the hyaline semicircular collar (arrowhead), (b) dorsal view showing dorsal ridges, (c)-(e) cell 2 showing a short anterior neck (arrowheads) and dorsal ridges (d), (f) dividing cell. (g)- (l) Thecamonas trahens, showing general appearance, nucleus (N), sleeve (arrowheads) and cytoplasmic strand (St), and note the anterior flagellum (AF). (g) cell 1, (h) cell 2, (i)-(l) cell 3. (m)-(r) Bodomorpha minima, showing general appearance and a rostrum(arrowheads). (m) cell 1, (n) cell 2, (o) cell 3, (p)-(r) cell 4. AF: anterior flagellum, PF: posterior flagellum, FR: flagellar reservoir. All micrographs are DIC images. Scale bar=5 μm for all figures.