Cocconeis cyclophora var. meisteri Riaux-Gobin

Joh, Gyeongje, 2021, Distribution of the genus Cocconeis (Bacillariophyceae) along the Seogwipo coast of Jeju Island, South Korea, Phytotaxa 528 (3), pp. 149-179 : 155

8. Cocconeis cyclophora var. meisteri Riaux-Gobin ( Figs 62, 63 )

Basionym: Riaux-Gobin et al. 2017, p. 58, figs 55–58.

Description: Valves elliptical to linear-elliptical, 22–24 μm long, 12–13 μm wide. SV: sternum broad, slightly sigmoid and enlarged between the center and ends of valve. A large ocellus in the middle on one side of the valve. Transapical striae radiate towards the apices, 24 in 10 μm, with 23 areolae in 10 μm of stria, a few small hyaline areas lacking areolae on each side of the sternum near the margins, a large hyaline area in the middle connected to the sternum. RV: a complete frustule observed with sigmoid raphe.

Remarks: This taxon was reported from the type locality, Nagasaki of Japan ( Riaux-Gobin et al. 2017).Along the Seogwipo coast of Jeju Island, it was encountered a few times in seaweeds collected from small rock pools; it is herein newly described for South Korea.

Figures

FIGURES 57–68. LM micrographs of Cocconeis species (4). Figs 57–61. Cocconeis suzukii, RVs (Figs 57, 59) and SVs (Figs 58, 60, 61) (Figs 57 and 58, 59 and 60, complete valves) Figs 62, 63. C. cyclophora var. meisteri, SV. Fig. 64. C. cyclophora var. decora, SV. Figs 65–68. C. voigtii, RVs (Figs 65, 68) and SVs (Figs 66, 67). Scale bar = 10 μm (Figs 57–68).