Ardissonea pulcherrima (Hantzsch) Grunow

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 : 12

9. Ardissonea pulcherrima (Hantzsch) Grunow ( Figs 58–60 )

Basionym: Synedra pulcherrima Hantzsch.

References: Mann 1925, p. 159, pl. 37, fig. 1; Hustedt 1931 –1959, p. 236, fig. 722; Cheng & Gao 2013, p. 57, fig. 139.

Type locality: East Indies .

Morphometrics: Valves 306 (240–750) μm in length, 30 (18–28) μm in width, transapical striae 9 (9) in 10 μm.

Remarks: This species is distinguished from neighboring taxa of similar morphology in that the apices of the valve are wedge-shaped and thickly expanded. It was reported from Philippines ( Mann 1925, Podzorski & Håkansson 1987), from Cuba ( Foged 1984), from China ( Cheng & Gao 2013). Only a few cases are recorded worldwide, and it must be a tropical taxon from the occurring localities or the type locality. This taxon was encountered rarely in a rock pool along the Seogwipo coast, and is newly reported to South Korea.

Figures

FIGURES 58–68. Diatom taxa of Seogwipo coast in Jeju Island (7). Figs 58–60. Ardissonea pulcherrima. Figs 61–64. Grammatophora undulata. Fig. 65. Bleakeleya notata. Fig. 66–68. Synedrosphenia gomphonema. Scale bars = 10 μm.