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Authority

I.A.N.Lucas (1967: 330, pl. 1a, b, d)

Class

Chrysophyceae

Order

Ochromonadales

Family

Paraphysomonadaceae

Additional References

Preisig & Hibberd (1982: 403, fig. 2A–F), Vørs (1992: 64, figs 26e, f, 30f, g)

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Basionym

N/A

Synonyms

N/A

Description

Cells spherical, 3.6–5.1 µm diameter, biflagellate. Flagella unequal; long flagellum 13.5–18 µm long, covered with 1.5 µm long mastigonemes; short flagellum c. 4.5 µm long. Cells with 1 type of body scale; scales circular, 0.8 µm diameter, with a central spine 1–1.3 µm long, without a thickened rim.

Distribution

Southern Ocean, south of Australia; sea-ice near Casey Station, East Antarctica (McConville & Wetherbee, 1983); East Australian waters (Hallegraeff, 1983); New Zealand (Moestrup, 1979); British waters (Lucas, 1967); Denmark (Thomsen, 1975).

Comments

Paraphysomonas imperforata is also known from many freshwater habitats, e.g. lakes in Greece (Kristiansen, 1980) and Denmark (Wujek & van der Veer, 1976) and a river in Chile (Dürrschmidt, 1980).

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