| Abstrakt: |
The living morphology, infraciliature and silverline system of two marine cyrtophorid ciliates from Chinese coastal waters, Dysteria cristata (Gourret and Roeser, 1888) Kahl, 1931 collected off Zhanjiang, south China, and Dysteria monostyla (Ehrenberg, 1838) Kahl, 1931 collected off Qingdao, north east China, have been investigated. The little known Dysteria cristata is redescribed and an improved diagnosis is supplied: marine Dysteria with an asymmetrical oval body shape when viewed from lateral aspect, 40–50 × 25–30 μm in vivo; with one right ventral and 2 frontoventral kineties in right field; 5–7 short kineties in left equatorial field; two ventrally located contractile vacuoles. Based on the Qingdao population and on previous descriptions, an improved diagnosis of Dysteria monostyla is also supplied: body elongate, size in vivo 60–110 × 30–40 μm; with 2 frontoventral and 3 right ventral kineties, 6–9 left equatorial kineties; and 2 ventrally located contractile vacuoles. After careful comparison it was concluded that the large Antarctic form described by Petz et al. (1995) represents a separate member of the genus for which the new species Dysteria antarctica nov. spec. is established. It is characterized thus: large marine Dysteria about 145 × 65 μm in vivo, with elongate body shape; no conspicuous grooves or ridges on body surface; 3 frontoventral kineties; 2 right ventral kineties anterior ends of which terminate at different levels; 2 contractile vacuoles. [Copyright &y& Elsevier] |
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