Keriochlamys styriaca Pascher

Kim, Yong Jae, 2017, New records of coccoid green algae in Korea, Journal of Species Research 6 (1), pp. 42-50 : 44-45

Keriochlamys styriaca Pascher ( Fig. 2 f-h)

References: Komárek and Fott 1983: 607, pl. 170, fig. 4; Shubert 2003: 288, fig. 15E.

Occurrence site: Chukdong reservoir.

Description: This species is free floating and globular or semiglobular in shape. It is readily identified by the thick wall, which has alveoli that refract light. Each cell has a parietal chloroplast containing a pyrenoid. The cells are 8-10 μm in diameter.

Distribution: Southeastern United Sates (Dillard, 1989), India ( Komárek and Fott, 1983). Austria ( Komárek and Fott, 1983).

Specimen: NIBRCL0000112292; DAEJIN-20150603-2.

Remark: This species is unicellular or solitary, but has four autospores in a thick mother cell wall formed during asexual reproduction. Shubert (2003) reported this species in phytoplankton, and Komárek and Fott (1983) reported it from a highland bog. The alveoli in the thick wall is a distinctive characteristic for identification of this species. It was initially classified in the family Chlorellaceae , order Chlorococcales in the class Chlorophyceae, but Guiry and Guiry (2016) moved this species to the family Oocystaceae , order Chlorellales in the class Trebouxiophyceae.

Figures

Fig. 2. a-c. Fotterella tetrachlorelloides, d, e. Trochiscia naumannii, f-h. Keriochlamys styriaca, i-k. Placosphaera opaca. Scale bar is 10μm.