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of the Southern Ocean (Hada, 1970); Ross Sea, in the region 69.98°–76.02°S and 134.85°–165.47°W, in sea-ice (Petz, unpublished data); Weddell Sea (Petz et al., 1995); Indian Ocean (Busch, 1930).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