Cocconeis pellucida Grunow, 1863

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 : 27

38. Cocconeis pellucida Grunow ( Figs 87, 88 )

Type locality: The Adriatic Sea, the Mediterranean.

References: Hustedt 1931 –1959, p. 357, fig. 812; Witkowski et al. 2000, p. 111, pl. 34, figs 1–3.

Morphometrics: Valves 46–104 (30–100) μm long, 39–95 (20–70) μm wide, transapical striae 30 (ca 30) in 10 μm of sternum valve, or 24 (20) in 10 μm of raphe valve.

Remarks: Cocconeis pellucida is common in warmer oceans, and is rarely reported in Europe ( Hustedt 1931 – 1959, Witkowski et al. 2000). This taxon has been reported abundantly as epiphytons in the eastern coast of Japan, Katsuura ( Takano 1962), the Penghu Island of Taiwan, Morlaix Bay, the western coast of France ( Riaux-Gobin 1991), Canary Islands of the eastern Atlantic Ocean, off West Africa ( Gil-Rodríguez et al. 2003), Parana coast of Brazil ( Procopiak et al. 2006), the New Hebrides (now Vanuatu) in the southern Pacific Ocean ( Stidolph et al. 2012), and from Mexico ( López-Fuerte & Siqueiros-Beltrones 2016). It was reported previously as plankton in marine waters of Korea ( Shim 1994), and is currently rarely epiphytic on seaweeds along the Seogwipo coast in Jeju Island.

Figures

FIGURES 78–90. Diatom taxa of Seogwipo coast in Jeju Island (9). Fig. 78. Cocconeiopsis orthoneoides. Fig. 79. Navicula semiarea. Figs 80, 81. Fallacia vittata. Figs 82–84. Cocconeis dirupta var. flexella. Figs 85, 86. Achnanthes citronella. Figs 87, 88. Cocconeis pellucida. Figs 89, 90. Planothidium quarnerensis f. rhombica. Scale bars = 10 μm.