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Ocean Ecosystems/ESRIG, University of Groningen and Arctic Centre, University of Groningen and the RaTS program, British Antarctic Survey.

Authority

G.Karst. (Karsten, 1905: 83, pl. 3, fig. 9a, b)

Class

Diatomophyceae

Order

Centrales

Family

Coscinodiscaceae

Synonyms

N/A

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Basionym

N/A

Additional References

Manguin (1915: 52, fig. 36), Heiden & Kolbe (1928: 495), Hendey (1937: 244–245, pl. 13, figs 3, 4), Priddle & Fryxell (1985: 130, figs A, B), Everitt & Thomas (1986: 5, fig. 3), Priddle & Thomas (1989: 163–165, figs 1–10), Hasle & Syvertsen (1997: 109, pl. 17, tab. 20a, b)

Description

Cells solitary or in chains of 2–18 cells, characteristically octagonal in girdle view; pervalvar axis 144–180 µm (Fig. d); girdle broad. Valves circular, 140–200 µm diameter, flat; central part raised, c. 50–75% of total diameter. Central rosette of areolae distinct (Fig. a, b); areolae hexagonal, 6 in 10 µm, decreasing slightly in size toward margin. Central labiate processes absent; row of marginal labiate processes 2–3 in 10 µm. Chloroplasts numerous, irregular, stellate.

Distribution

Wide distribution in Antarctic waters and southern seas; Lützow-Holm Bay (Tanimura et al., 1990); South Georgia, the Sandwich Group, Bransfield Strait, Cape of Good Hope (Hendey, 1937); inshore Davis Station, Prydz Bay, East Antarctica (Everitt & Thomas, 1986).

Comments

N/A

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