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Authority

Cleve (1889: 55)

Class

Diatomophyceae

Order

Centrales

Family

Chaetoceraceae

Synonyms

N/A

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Basionym

N/A

Additional References

Cleve (1894: 12, pl. 1, fig. 5), Hustedt (1958: 135), VanLandingham (1968: 713), Evensen & Hasle (1975, figs 25, 26), Priddle & Fryxell (1985: 44, figs A–C), Rines & Hargraves (1988: 71, figs 141, 142), Hasle & Syvertsen (1997: 211, pl. 44, tab. 51)

Description

Cells in spirally curved chains, ±rectangular in broad girdle view, isovalvate; pervalvar axis 20–38 µm; adjacent cells connected by the raised corners. Valves elliptical, concave; apical axis 7–30 µm diameter. Apertures between adjacent cells rhombic, oval or circular. Central labiate process present only on terminal cell of chain, short, flattened, with no protrusion or thickening on the inside (Evensen & Hasle, 1975). Setae with characteristic curvature, all directed toward the outside of the spiral, thin, tapering distally. Chloroplast single. Resting spores smooth.

Distribution

Ross Sea (Watanabe, 1982); Weddell Sea (Garrison & Buck, 1989b); cosmopolitan, mostly temperate and warm waters (Hasle & Syvertsen, 1997); Antarctic sector of the Atlantic Ocean, 64°10’S 0°08’W, 59°S 0°05’W (Hustedt, 1958); Southern Ocean (Priddle & Fryxell, 1985).

Comments

N/A

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