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Authority

(Manguin) Paddock (1988: 88, pl. 32)

Class

Diatomophyceae

Order

Pennales

Family

Plagiotropidaceae

Synonyms

N/A

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Basionym

Tropidoneis fusiformis Manguin (1957: 130, pl. 6, fig. 39)

Additional References

Manguin (1960: 322, pl. 16, figs 193a, b, 194, as T. fusiformis), Paddock (1990: 153, pl. 19.1, fig. 14), Hasle & Syvertsen (1997: 289, pl. 65, tab. 72)

Description

Cells usually lying in broad girdle view, fusiform, weakly silicified, lanceolate in valve view; apical axis 49–135 µm; pervalvar axis c. 11 µm (at mid-point of cell 108 µm long). Raphe fin-like structures on narrow parts of valve. Transapical striae fine, aligned somewhat diagonally, 26–28 in 10 µm. Helictoglossae enlarged.

Distribution

Antarctic Ocean (Paddock, 1990); Weddell-Scotia Confluence (Garrison et al., 1987, as Tropidoneis fusiformis); Terre Adélie (Manguin, 1957).

Comments

See Paddock (1990: 153) for additional synonyms.

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