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Authority

(Busch) Kahl (1932: 504, fig. 81.36)

Class

Spirotrichea

Order

Strombidiida

Family

Strombidiidae

Additional References

Petz et al. (1995: 110)

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Basionym

Buehringa antarctica Busch (1930: 84, fig. 1)

Synonyms

Strobilidium antarcticum (Busch) Kahl sensu Hada (1970: 27), par lapsus

Description

In vivo 35–55 × 20–40 µm. Body obovoid to almost spherical. Peristomial field large; oral cavity shallow apically, separated from ventral surface by cytoplasmic wall. Equatorial kinety continuous ventrally or with a very small gap, composed of dikinetids. Ventral kinety usually to right of median. Adoral zone of membranelles large and forming a closed circle in top view, 14–17 anterior membranelles continuous with 6–7 ventral membranelles that invaginate on anterior surface. Girdle of c. 20 µm long extrusomes distinct, supraequatorial. Subpellicular platelet layer in posterior two-thirds of cell. Macronucleus 1; micronucleus 1. Movement: usually rather slow.

Distribution

Indian sector of the Southern Ocean (Hada, 1970); Ross Sea, in the region 69.98°–76.02°S and 134.85°–165.47°W, in sea-ice (Petz, unpublished data); Weddell Sea (Petz et al., 1995); Indian Ocean (Busch, 1930).

Comments

The cytoplasm probably contains sequestered chloroplasts.

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