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Authority

G.Karst. (Karsten, 1905: 90, pl. 8, fig. 14)

Class

Diatomophyceae

Order

Centrales

Family

Asterolampraceae

Synonyms

N/A

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Basionym

N/A

Additional References

Hustedt (1958: 128, fig. 91), Priddle & Fryxell (1985: 116, figs B–D, F); Hasle & Syvertsen (1997: 139, pl. 23)

Description

Cells solitary, discoid. Valves slightly convex, 22–48 µm diameter; central hyaline area occupying c. 50–75% of valve diameter; 6 or 7 hyaline rays, one markedly narrower than the others, extending from centre almost to periphery of valve and ending in a small tubular process. Separating lines within the central area broken or with small branchlets in the middle. Peripheral sectors areolate; areolae rather coarse, of uniform size, 8–10 in 10 µm, in tangential lines. Chloroplasts spherical, numerous.

Distribution

Southern Ocean, offshore MacRobertson Land, 65°38’S 68°07’E; coastal waters near Davis Station, East Antarctica; Franklin I., Ross Sea; South Orkney Is. (Ferrario & Ferreyra, 1987); Bellingshausen Sea, Drake Passage (Hendey, 1937); Indian sector of the Antarctic Ocean (Kopczyńska et al., 1986); Weddell-Scotia Sea (Garrison et al., 1987).

Comments

N/A

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