Gephyria media Arnott, 1860

Joh, Gyeongje, 2021, Distribution and frequent occurrence of diatom taxa (Bacillariophyta) inhabiting warmer oceans in Seogwipo coast of Jeju Island, southernmost Korea, Phytotaxa 517 (1), pp. 1-67 : 19

25. Gephyria media Arnott ( Figs 44, 45 )

Type locality: Guano, Islands of Elide, on coast of Lower California .

References: Hustedt 1931 –1959, p. 10, fig. 544; Witkowski et al. 2000, p. 56, p. 14, figs 1–3; Siqueiros-Beltrones & Argumedo-Hernández 2014, figs 4, 6, 8.

Morphometrics: Valves 188–198 (90–400) μm long, 27 (20–37) μm wide, transapical striae 4 (5–7) in 10 μm.

Remarks: Gephyria media is distributed in coast of warmer oceans, and, in Europe, only in the Mediterranean ( Hustedt 1931 –1959, Witkowski et al. 2000). This taxon has been reported from the East China Sea of China ( Liu 2008), as an epiphyte on a red seaweed and as benthic diatoms along the western coast of the Baja California Peninsula, Mexico, respectively ( Siqueiros-Beltrones & Argumedo-Hernández 2014, López-Fuerte et al. 2015), and from the Red Sea of Egypt ( Gerasimiuk & Kovtun 2014). It is mainly distributed in subtropical regions. In South Korea, this species was reported previously, from the southeastern coast of the East Sea, Gijang ( Choi & Noh 1987), and recently occurring very rare in The Seogwipo coast in Jeju Island.

Figures

FIGURES 39–45. Diatom taxa of Seogwipo coast in Jeju Island (5). Figs 39–41. Cocconeis convexa. Figs 42, 43. Climacosphenia moniligera. Figs 44, 45. Gephyria media. Scale bars = 10 μm.