Cymatoneis margarita Witkowski

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 : 33

46. Cymatoneis margarita Witkowski ( Fig. 105 )

Type locality: Orum Beach , Oman .

References: Witkowski et al. 2000. p. 179, pl. 109, figs 9–17.

Morphometrics: Valves 16–17 (13.5–18) μm long, 6–6.3 (5–6) μm wide, and transapical striae 18–19 (18–20) in 10 μm.

Remarks: This species differs from other Cymatoneis in smaller size and lanceolate to elliptic-lanceolate valve outline ( Witkowski et al. 2000). Cymatoneis margarita is distributed in Oman as type locality, the Mississippi Delta and Borneo ( Witkowski et al. 2000). Since then, it has been reported off the coasts of Guinea, West Africa ( Compère and Riaux-Gobin 2009). Although the species have been reported in a few areas, it seems to be pantropical taxon in warmer ocean.

This taxon has been found a few times in sand beaches of the Seogwipo coast, representing a new report to South Korea.

Figures

FIGURES 101–110. Diatom taxa of Seogwipo coast in Jeju Island (11). Figs 101, 110. Amphora arenaria. Figs 102, 103. Navicula perrhombus. Figs. 104. Cymatoneis circumvallata. Fig. 105. C. margarita. Figs 106, 107. Diploneis gemmatula. Figs 108, 109. D. notabilis. Scale bars = 10 μm.