Scenedesmus sempervirens Chodat

Kim, Yong Jae, 2017, New records of coccoid green algae in Korea, Journal of Species Research 6 (1), pp. 42-50 : 48-49

Scenedesmus sempervirens Chodat ( Fig. 4e, f )

References: Komárek and Fott 1983: 915, pl. 246, fig. 6; Yamagishi and Akiyama 1995: 15:30, figs. 1-5.

Synonym: Scenedesmus abundance (Kirchner) Chodat sensu auct. Post. Sine type.

Scenedesmus caudatus var. minor Kützing.

Scenedesmus spinosus var. crassispinosus Hortobagyi.

Occurrence site: Chukdong reservoir (WT 28.3℃, pH 8.3. EC 213 μs/cm).

Description: Cells arranged in coenobia composed of 2-4(-8) cell arranged with sides contacting in a straight (or only rarely curved) line or slightly alternating row. The cells are long and ovoid or ellipsoidal, with conical or rounded poles. Small spines (1-2) occur at the poles of the inner cells. The marginal cells have a slightly curved or straight spine at the poles. The outer side wall of the marginal cells is straight or slightly convex, with 1-2 spines in the center. Each cell has a chloroplast containing a pyrenoid. The cells are 10-20 μm in length and 5-8 μm in width.

Distribution: Switzerland ( Chodat, 1913), cosmopolitan ( Komárek and Fott, 1983).

Specimen: NIBRCL0000112298; DAEJIN-20150603-6.

Remark: Komárek and Fott (1983) merged S. abundance , S. caudatus var. minor and S. spinosus var. crassispinosus into this species as a synonym. S. abundance probably described a group of several types, as noted by Chodat (1926). According to Komárek and Fott (1983), Theses taxon is included in S. sempervirens .

Figures

Fig. 4. a-c. Pachycladella zatoriensis, d. Crucigenia mucronata, e, f. Scenedesmus sempervirens. Scale bar is 10μm.