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Authority

(Corliss & Snyder) Petz, Song & Wilbert (1995: 170, fig. 50)

Class

Spirotrichea

Order

Urostylida

Family

Urostylidae

Additional References

N/A

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Basionym

Tachysoma parvulum Corliss & Snyder (1986: 44, fig. 6)

Synonyms

N/A

Description

In vivo 155–180 × 40–45 µm. Body fusiform, frontal portion enlarged, head-like, posteriorly tapering, dorsoventrally slightly flattened; oral cavity deep, with a conspicuous cytoplasmic lip on right. Cirri: 3 frontal and 5–7 transverse. Marginal cirral rows 1 right and 1 left. Midventral row shortened, composed of 5–9 cirral pairs (sometimes irregular). Dorsal kineties 3. Adoral zone of c. 55–58 membranelles spoon-shaped, extends far onto right side. Macronuclear nodules 2; micronuclei (1 or) 2. Contractile vacuole supra-equatorial. Movement: slowly crawling.

Distribution

Ross Sea, at 73°36’S 134°51’W, in nilas ice (Petz, unpublished data); Weddell Sea (Corliss & Snyder, 1986; Petz et al., 1995).

Comments

N/A

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