Podocystis spathulata (Shadbolt) Van Heurck, 1896

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 : 21

27. Podocystis spathulata (Shadbolt) Van Heurck ( Figs 30, 31 )

Basionym: Euphyllodium spathulatum Shadbolt.

Synonym: Podocystis spathulata (Shadbolt) Frenguelli.

Type locality: Geo. Busk, Port Natal (now Durbon, South Africa)

Reference: Hustedt 1931 –1959, p. 133, fig. 653.

Morphometrics: Valves 41–46 (37–100) μm long, 37–41 (25–53) μm wide, transapical striae 4–5 (5–7) in 10 μm, and 5 in 10 μm towards the ends.

Remarks: Podocystis spathulata is predominant on the coastal areas of the Pacific Ocean and especially common in the Australian Islands ( Hustedt 1927 – 1931), occurring in Madagascar ( Sournia 1968), in Tanzania ( Foged 1975), in Tahiti ( Ricard 1977), in Puerto Rico ( Navarro 1981), in Fujian coast of China ( Jin et al. 1985), in Palawan of Philippines ( Podzorski & Håkansson 1987), in Ishigaki Island of Okinawa, Japan ( Negoro & Yoshida 1990), in Guam, Society Islands and Mahé ( Lobban et al. 2012), in northeastern Brazil ( Costa et al. 2009), in Chuuk Lagoon of Micronesia ( Park et al. 2018). It is a typical tropical taxon growing in warmer oceans. In South Korea, it was reported previously as plankton in the southern sea ( Shim 1994), and very rare as benthic along the Seogwipo coast in Jeju Island.

Figures

FIGURES 29–38. Diatom taxa of Seogwipo coast in Jeju Island (4). Fig. 29. Perissonoe cruciata. Figs 30, 31. Podocystis spathulata. Figs 32–34. Cyclophora tenuis. Fig. 35–37. Glyphodesmis rhombica. Fig. 38. Triceratium robertsianum. Scale bars = 10 μm.