Tetramphora decussata (Grunow) Stepanek & Kociolek, 2016

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 : 40

63. Tetramphora decussata (Grunow) Stepanek & Kociolek ( Fig. 134 )

Basionym: Amphora decussata Grunow.

Type locality: Quarnero; Honduras.

References: Hendey 1964, p. 266, pl. 37, fig. 9; Lobban et al. 2012, p. 298, pl. 54, fig. 5, pl. 55, figs 1–3; Stepanek & Kociolek 2016, p. 138.

Morphometrics: Valves 90–121 (55–110) μm long, 17–21 (15–19) μm wide, and transapical striae dorsally 16 (18– 21) in 10 μm, ventrally 13–14 (16) in 10 μm.

Remarks: Tetramphora decussata is not common, and is found occasionally in the English Channel ( Hendey 1964). This taxon has been reported from Mahé Island of the Seychelles in the western Indian Ocean ( Giffen 1980), Puerto Rico ( Navarro 1982b), Cuba ( Foged 1984), the Caribbean Sea ( Navarro & Hernández-Becerril 1997), Guam in the Pacific Ocean ( Lobban et al. 2012), the Galapagos Island of the eastern Pacific Ocean ( Stidolph et al. 2012), and from the Mediterranean ( Álvarez-Blanco & Blanco 2014). It is a typical tropical taxon inhabiting warmer coasts. It was reported previously in the southern sea of Korean Peninsula in 1984 ( Shim 1994), and in this survey of Jeju Island, it was rarely encountered along the Seogwipo coast.

Figures

FIGURES 121–134. Diatom taxa of Seogwipo coast in Jeju Island (13). Figs 121, 122. Amphora bigibba var. interrupta. Figs 123, 124. A. staurohyalina. Figs 125, 130. Nitzschia marginulata var. didyma. Figs 126, 127. Seminavis cf. pusilla. Figs 128, 129. Nitzschia composita. Figs 131, 132. Seminavis latior. Fig. 133. Tetramphora intermedia. Fig. 134. T. decussata. Scale bars = 10 μm.