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Authority

(Cleve) Hasle (1965a: 29, pl. 12, figs 15, 16)

Class

Diatomophyceae

Order

Pennales

Family

Bacillariaceae

Synonyms

Nitzschia barkleyi Hust. (Hustedt, 1952: 293, figs 13, 14)
Pseudonitzschia barkleyi (Hust.) Manguin (1960: 330)

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Basionym

Nitzschia lineola Cleve (1897: 300, fig. 10), Hasle & Medlin (1990a: 170, pl. 22.3, figs 15–21)

Additional References

Manguin (1954: 23, Heard I.), Hasle (1974: 319), Hasle & Syvertsen (1997: 317, pl. 71, tab. 75)

Description

Cells solitary or in long rigid chains, overlapping c. one-sixth of cell length, linear to lanceolate in girdle view, linear and attenuated towards the poles in apical view, with slightly sigmoidal ends; apical axis 56–112 µm; transapical axis 1.8–2.7 µm. Transapical striae 22–28 in 10 µm. Interstrial membranes perforated by 1 (or 2) rows of minute poroids. Keel eccentric; fibulae distinct, 11–16 in 10 µm. Central nodule present.

Distribution

Coastal waters off Davis Station and Polar Aviation I., East Antarctica; type locality, 60°03’N 05°51’W (Cleve, 1897); Antarctic, sub-Antarctic, Arctic (Hasle & Medlin, 1990a); KERFIX, 50°40’S 68°25’E, Southern Ocean (Kopczyńska et al., 1998); Weddell-Scotia Confluence (Garrison et al., 1987).

Comments

N/A

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