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Authority

(Laackmann) Laackmann (1910a: 391, pl. 36, fig. 4; pl. 42, fig. 12)

Class

Spirotrichea

Order

Tintinnida

Family

Xystonellidae

Additional References

Van der Spoel (1986: 7), Petz et al. (1995: 151), Alder (1999: 349)

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Basionym

Cyttarocylis calyciformis Laackmann (1907: 236, fig. 3)

Synonyms

Cymatocylis brevicaudata (Laackmann) Kofoid & Campbell (1929: 125, fig. 272)
Cymatocylis cylindroides (Laackmann) Kofoid & Campbell (1929: 134, fig. 270)

Description

Lorica 125–520 × 115–150 µm; bowl cup-shaped; inner collar serrated; outer collar bent downwards; antapical horn highly variable, often long; wall finely reticulate (appears hyaline at low magnification and in fixed specimens), without agglutinated particles. Trophont with 41–51 somatic kineties (c. 17 in lateral field, 15 in left and 12 in right field, 1 ventral kinety, 1 dorsolateral kinety). Adoral membranelles 17 external and 1 internal. Macronuclear nodules 2. Contractile vacuole probably 1. Movement: moderately fast.

Distribution

Indian sector of the Southern Ocean (Laackmann, 1907; Hada, 1970); Bellingshausen Sea (Klöser, 1990); Atlantic sector of the Southern Ocean (Van der Spoel, 1986; Wasik & Mikolajczyk, 1994a; Thompson et al., 1999); Weddell Sea (e.g. Heinbokel & Coats, 1986; Petz et al., 1995); South Atlantic (Van der Spoel, 1986).

Comments

N/A

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