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Authority

Cleve (1901a: 933, fig. 12)

Class

Diatomohyceae

Order

Pennales

Family

Bacillariaceae

Synonyms

N/A

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Basionym

N/A

Additional References

Hustedt (1958: 169, figs 176–190), Simonsen (1974: 50, pl. 35, figs 3–15), Kaczmarska et al. (1986: 1859, fig. 10), Hasle & Medlin (1990b: 177, pl. 23.3, fig. 3), Hasle & Syvertsen (1997: 330, pl. 74, tab. 77), Fryxell (2000: 47, figs 1–12)

Description

Cells solitary, lanceolate, with capitate apices; apical axis 8–27 µm; transapical axis 3.8–5.8 µm [see Hasle & Syvertsen (1997, tab. 77) and Fryxell (2000, fig. 2)]. Transapical striae straight in valve centre, but curved towards ends, 25–34 in 10 µm, each a uniseriate row of areolae; areolae 30–40 in 10 µm. Fibulae 12–16 in 10 µm. Raphe eccentric (Fig. a). Central nodule present.

Distribution

Coastal waters off Davis Station, East Antarctica; Southern Ocean, offshore Davis Sea and offshore Wilkes Land; Weddell-Scotia Confluence (Garrison et al., 1987); 66°N–62°S (Hasle, 1976b).

Comments

Cells collected by us had slightly larger dimensions (apical axis 10.4–27 µm; transapical axis 3.8–5.8 µm; striae 30–34 in 10 µm; areolae 30–35 in 10 µm) than the emended description of Fryxell (2000).

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