Triceratium robertsianum Greville, 1866

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 : 16

17. Triceratium robertsianum Greville ( Fig. 38 )

Synonym: Biddulphia robertsiana Boyer.

Type locality: Curteis Straits, Queenland.

Reference: Hustedt 1927 –1930, p. 803, fig. 466.

Morphometrics: Valves 83 (60–160) μm in apical length, areolae 21 (15–25) in 100 μm.

Remarks: Triceratium robertsianum is distributed along the coast of warmer marine waters ( Hustedt 1927 – 1930), in the coasts of India ( Gopinathan 1984, Baliarsingh et al. 2012), and in the Suez Canal of Egypt ( Zalat 2002). In addition, it is on the check-list of diatom flora in the Caribbean Sea ( Navarro & Hernández-Becerril 1997). It was very rare along the Seogwipo coast in Jeju Island, and is newly described in South Korea.

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.