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 67. Nitzschia fluminensis Grunow ( Figs 146–149 ) . Synonym: Nitzschia neogena Grunow. References: Foged 1984 , p. 75, pl. 58, fig. 4; Witkowski et al. 2000 , p. 381, pl. 202, figs 6–9, pl. 94, fig. 1; Hein et al. 2008 , p. 84, pl. 58, fig. 12 Type locality: The Adriatic Sea. Morphometrics: Valves 171 (130–160) μm long, 13 (13–15) μm wide, fibulae 4 (4–6) in 10 μm, transapical striae 14 (14–16) in 10 μm. Remarks: Nitzschia fluminensis is similar to N . majuscula Grunow in size and valve morphology, but differs in that fibulae are irregularly spaced and partly prolonged into transapical ribs. It is a marine taxa inhabiting warmer coasts, of Puerto Rico ( Navarro 1983 ), Cuba ( Foged 1984 ), the Mediterranean ( Witkowski et al. 2000 ), the Bahamas ( Hein et al. 2008 ), the Cape Verde Islands off the northwestern Africa ( Stidolph et al. 2012 ), and the Baja California Peninsula of Mexico (Siqueiros-Beltrones et al. 2017). In the Seogwipo coast, it is rarely encountered in rock pools along the Seogwipo coast in Jeju Island, representing a new record for South Korea .