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Authority

(Schütt) VanLand. (VanLandingham, 1968: 733)

Class

Diatomophyceae

Order

Centrales

Family

Chaetoceraceae

Synonyms

Chaetoceros septentrionalis auct. non Østrup (1895), sensu Cleve (1896: 9, pl. 2, fig. 8)

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Basionym

Chaetoceros gracile Schütt (1895: 42, pl. 5, fig. 13)

Additional References

Hustedt (1927–30), Cupp (1943: fig. 101), Priddle & Fryxell (1985: 48, figs A–F)

Description

Cells solitary, rectangular in girdle view, isovalvate; pervalvar axis 6–10 µm. Valves elliptical; apical axis 6–10 µm. Setae fine, smooth, diverging at 60–90° to the pervalvar axis. Chloroplasts 2 per cell. Resting spores discoid.

Distribution

Weddell-Scotia Sea (Buck & Garrison, 1983; Garrison et al., 1987); Ross Sea (Watanabe, 1982); Southern Ocean (Priddle & Fryxell, 1985); Bransfield Strait (Priddle, 1985).

Comments

Chaetoceros neogracilis has also been reported from the Mediterranean, Baltic and Arctic seas.

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