Distribution and frequent occurrence of diatom taxa (Bacillariophyta) inhabiting warmer oceans in Seogwipo coast of Jeju Island, southernmost Korea Author Joh, Gyeongje text Phytotaxa 2021 2021-08-30 517 1 1 67 http://dx.doi.org/10.11646/phytotaxa.517.1.1 journal article 10.11646/phytotaxa.517.1.1 1179-3163 8061058 16. Triceratium reticulum Ehrenberg ( Fig. 7 ) Synonym: Biddulphia reticulum (Ehrenberg) Boyer ; Trigonium reticulum (Ehrenberg) Simonsen. Type locality: not given. References: Hustedt 1927 –1930, p. 823, figs 485, 486; Hendey 1964 , p. 102, pl. 25, fig. 6. Morphometrics: Valves 51 (25–80) μm in apical length, areolae 3–4 (4–5) in 10 μm. Remarks: Triceratium reticulum was found predominantly in marine littoral areas of tropical and subtropical oceans ( Hustedt 1927 –1930, Hendey 1964 , Witkowski et al. 2000 ). This taxon was reported near Vero Beach of Florida ( Mahoney & Gibson 1983 ), from the southeastern coast of India ( Rajasekar et al. 2005 , Sahu et al. 2012 ). It was listed in the diatom catalogue of the Caribbean Sea ( Navarro & Hernández-Becerril 1997 ). It was reported rarely from the western coast of Korea in the past ( Shim 1994 ), and occurred very rarely along the Seogwipo coast in Jeju Island.