Cymatoneis circumvallata Cleve, 1894

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

45. Cymatoneis circumvallata Cleve ( Figs 104 )

Synonym: Navicula circumvallata (Cleve) Schmidt.

References: Peragallo & Peragallo 1897–1908, p. 107, pl. 13, fig. 28; Giffen 1976, p. 384, figs 44, 45; Podzorski & Håkansson 1987, p. 56, pl. 18, figs 6, 9, 11, 12.

Type locality: Balearic Island ; Ceylon ; Labuan; Japan.

Morphometrics: Valves 28–38 (27–52) μm long, 13–14 (10–13) μm wide, transapical striae 10–11 (9–12) in 10 μm.

Remarks: This taxon has been reported from a few localitions: Saldanha Bay lagoon of South Africa ( Giffen 1976), Palawan of Philippines ( Podzorski & Håkansson 1987) , and the mangrove coast of the Baja California Peninsula of Mexico ( Siqueiros-Beltrones et al. 2011). It has been reported rarely, but can be assigned to a typical tropical taxon based on the earliest type locality and subsequent discovery areas. It was found rarely in rock pools along the Seogwipo coast in Jeju Island, and is herein newly reported in 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.