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Authority

Ehrenb. (Ehrenberg, 1844a: 78)

Class

Diatomophyceae

Order

Centrales

Family

Coscinodiscaceae

Synonyms

N/A

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Basionym

N/A

Additional References

Ehrenberg (1854: 18, fig. 44), Hendey (1964: 78, pl. 22, fig. 2), Hasle & Syvertsen (1997: 107, pl. 18, tab. 20a, b)

Description

Cells solitary, discoid, thick-walled. Valves circular, flat, 35–200 µm diameter. Central rosette of areolae absent. Areolae coarse, 1–4 in 10 µm, in irregular radial rows. Marginal area prominent, with a ring of labiate processes (not visible by LM) 2–10 areolae apart. Chloroplasts small, spherical.

Distribution

Ross Sea (Watanabe, 1982); Bransfield Strait (Boden, 1985); Amundsen Sea, 70°50’S 102°13’W, “Belgica ” (van Heurck, 1909).

Comments

See VanLandingham (1968: 923) for full synonymy.

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