Amphitetras antediluviana Ehrenberg, 1840

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 : 13

15. Amphitetras antediluviana Ehrenberg ( Figs 22–24 )

Synonym: Triceratium antediluvianum (Ehrenberg) Grunow ; Biddulphia antediluviana (Ehrenberg) Van Heurck.

LectoType locality: Marine coastal locality at the Isle Tj ̂rn, SW Sweden, designated by Jahn & Kusber (2006).

References: Hustedt 1927 –1930, p. 810, fig. 472; Jahn & Kusber 2006, p. 528, figs 1–5.

Morphometrics: Valves 39–42 (25–130) μm long, areolae 4–5 (3–5) in 10 μm.

Remarks: Amphitetras antediluviana is distributed in the littoral area along the marine coasts of European Atlantic Ocean to western coast of Norway ( Hustedt 1927 –1930), and in the Mediterranean ( Rivera-González & Sánchez-Castillo 2011). This taxon has been reported from many localities: Belize in the Caribbean Sea ( Hargraves 1982), Vero Beach in Florida ( Mahoney & Gibson 1983), Cuba ( Foged 1984), Chubut Province in Argentina ( Ferrario & Ferreyra 1986), Mauritania in West Africa ( Sterrenburg & Sterrenburg 1990), and the Suez canal lakes and adjacent areas of Egypt ( Zalat 2002). It is listed on the diatom catalogue of the Caribbean Sea ( Navarro & Hernández-Becerril 1997). Although this species originates from Sweden and occurs in European coasts such as the Mediterranean, it has a much higher incidence in subtropical or tropical areas. It was encountered in seveal places of rock pools along the Seogwipo coast in Jeju Island, representing a new record for South Korea.

Figures

FIGURES 22–28. Diatom taxa of Seogwipo coast in Jeju Island (3). Fig. 22–24. Amphitetras antediluviana. Fig. 25. Amphipentas pentacrinus. Figs 26–28. Leudugeria janischii. Scale bars = 10 μm.