Distribution and frequent occurrence of diatom taxa (Bacillariophyta) inhabiting warmer oceans in Seogwipo coast of Jeju Island, southernmost Korea Author Joh, Gyeongje text Phytotaxa 2021 2021-08-30 517 1 1 67 http://dx.doi.org/10.11646/phytotaxa.517.1.1 journal article 10.11646/phytotaxa.517.1.1 1179-3163 8061058 78. Campylodiscus stellatus Greville ( Figs 150–152 ) Type locality: In Californian guano. References: Williams 1988 , p. 22, pl. 27, figs 5, 6; Stidolph et al. 2012 , pl. 38, fig. 23. FIGURES 193–202. Diatom taxa of Seogwipo coast in Jeju Island (20). Figs. 193, 194. Cocconeis convexa : sternum valve (Fig. 180) and raphe valve (Fig. 181) of external view. Figs. 195–197, 200, 201. Navicula zostereti : characteristic lineate striation and cental raphe endings in external valves. Figs 198, 199. Hydrosynedra lanceolata : external valves. Fig. 202. Amphipentas pentacrinus : internal valve. Figs 193–202: SEM. Scale bars = 20 μm (Fig. 201), 10 μm (Figs 196, 202), 5 μm (Figs 193, 194, 197), 2 μm (Figs 195, 200), 1 μm (Figs 198, 199). FIGURES 203–212. Diatom taxa of Seogwipo coast in Jeju Island (21). Figs 203–206. Amphora staurohyalina : external (Figs 203, 204) and internal view (Figs 205, 206) of valves, double striation, hyaline thickened stauros in the middle parts of dorsal side, and apical folds on valve. Figs 207–210. Amphora arenaria : dotted striation and arcing central raphe endings of the external valves (Figs 207–219), internal view of valve (Fig. 210). Figs 211, 212. Diploneis gemmatula : external view of valve. Figs 203–212: SEM. Scale bars = 20 μm (Fig. 211), 10 μm (Figs 207, 210), 5 μm (Figs 203, 206, 209), 2 μm (Figs 204, 205, 208, 212). Morphometrics: Valves 73–91 (103) μm long, 72–98 (107) μm wide, and transapical ribs in inner parts of valve, 4–5 (4.4) in 10 μm. Remarks: Campylodiscus stellatus was reported from the Saint Paul Island of the southern Indian Ocean ( Reichardt 1871 ), and Paama Island, a small one in the New Hebrides (now, Vanuatu ) of the southern Pacific Ocean ( Stidolph et al. 2012 ). This taxon has been reported in a few places except for the type locality. It was rare epiphytic along the Seogwipo coast, Jeju Island, and represents a new record for South Korea .