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Authority

Ehrenb. (Ehrenberg, 1844a: 78)

Class

Diatomophyceae

Order

Centrales

Family

Coscinodiscaceae

Synonyms

Coscinodiscus asteromphalus var. centralis (Ehrenb.) Grunow (1884: 79)
Coscinodiscus oculus-iridis var. tenuistriata Grunow (1884: 77)
See VanLandingham (1968: 873) for full synonymy.

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Basionym

N/A

Additional References

Ehrenberg (1854: pl. 18, fig. 39; pl. 21, fig. 3; pl. 22, fig. 1), Hendey (1964: 245), Priddle & Fryxell (1985: 132, figs A, B), Hasle & Syvertsen (1997: 105, fig. 6a–c; pl. 15, tab. 20a, b)

Description

Cells solitary, discoid. Valves circular, slightly convex, 100–300 µm diameter; pervalvar axis 50–60 µm (Hendey, 1964). Central rosette of large areolae conspicuous. Surrounding areolae 4–6 in 10 µm, becoming finer (6 in 10 µm) towards the margin, arranged radially in spiralling rows. Marginal ring of labiate processes within 3 or 4 areolae the margin, visible by LM. Most processes small, but 2 are comparatively large; processes 2–5 areolae apart. Chloroplasts small, plate-like.

Distribution

Southern Ocean (Priddle & Fryxell, 1985); South Georgia (Hendey, 1964); Bransfield Strait (Priddle, 1985); Ross Sea (Watanabe, 1982).

Comments

N/A

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