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Authority

(G.C.Wall.) Schütt (1892: 258, fig. 64)

Class

Diatomophyceae

Order

Centrales

Family

Thalassiosiraceae

Synonyms

N/A

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Basionym

Coscinodiscus sol G.C.Wall. (Wallich, 1860: 38, pl. 2, fig. 1)

Additional References

Ricard (1987: figs 124–128), Round et al. (1990: 134), Hasle & Syvertsen (1997: 40, pl. 2, tab. 4)

Description

Cells solitary, discoid, with a wing of organic extrusions (stiffened mucilage?) lying around the periphery of the cell. Valves circular, 10–60 µm diameter, with a shallow mantle. Areolation radial to tangential; areolae 5–9 in 10 µm, opening internally via fine cribra and externally by larger foramina. Strutted processes in a single marginal ring; processes 4–5 in 10 µm, as well as single process near valve centre. Two labiate processes present just inside marginal ring of strutted processes. Plastids small, discoid.

Distribution

Southern Ocean, south of Australia.

Comments

N/A

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