(NAT 26 Revision of the genera Acineria, Trimyema and Trochiliopsis (Protozoa, Ciliophora) H. Augustin, W. Foissner & H. Adam Zoologisches Institut der Universitat Salzburg, Hellbrunnerstrasse 34, Salzburg, Austria, A-5020 Conte Synopsis . Introduction . Materials and Methods Genus Acineria Genus Trimyema Genus Trochiliopsis . References Synopsis The genera Acineria, Trimyema and Trochiliopsis are reviewed. The revision is based on an investigation of each of the type-species, namely Acineria incurvata Dujardin, Trimyema compressa Lackey, and Trochiliopsis opaca Penard, which were found in a sewage-treatment plant. Acineria comprises three species; A. incurvata, A. nasuta, and A. uncinata. A. acuta is a synonym of A. incurvata. Trimyema comprises eight species; T. alfredkahli, T. claviformis, T. compressa, T. echinometrae, T. kahli, T. marina, T. minuta and T. pleuri-spiralis but T. alfredkahli and T. claviformis are perhaps synonyms of T. marina. Trochiliopsis is monotypic and new for the fauna of Austria. This genus is apparently closely related to the autochthonous soil ciliate Stammeridium kahli. Zusammenfassung Die Gattungen Acineria, Trimyema und Trochiliopsis werden revidiert. Die Revision basiert auf der Untersuchung der Typusarten, namlich Acineria incurvata Dujardin, Trimyema compressa Lackey und Trochiliopsis opaca Penard, die in einer Klaranlage gefunden wurden. Die Gattung Acineria umfasst drei Arten; A . incurvata, A . nasuta und A . uncinata. A . acuta ist ein Synonym von A . incurvata. Von Trimyema sind acht Arten beschrieben; T. alfredkahli, T. claviformis, T. compressa, T. echinometrae, T. kahli, T. marina, T. minuta und T. pleurispiralis. T. alfredkahli und T. claviformis sind moglicherweise Synonyme von T. marina. Trochiliopsis ist monotypisch und neu fur die Fauna Osterreichs. Diese Gattung ist hochstwahrscheinlich nahe verwandt zum autochthonen Boden-Ciliaten Stammeridium kahli. Introduction Only few activated-sludge ciliates have been characterized by silver-staining techniques which is sometimes necessary for their correct identification. To overcome this deficiency, a project to redescribe the most frequently occurring species was begun. During these studies the poorly known type-species of the genera Acineria, Trimyema, and Trochiliopsis were found. They have been reinvestigated using modern techniques which provide a base upon which to revise these genera. Supported by the 'Fonds zur Forderung der wissenschaftlichen Forschung, Projekt Nr. P 5889'. Bull. Br. Mus. nat. Hist. (Zool.) 52(6): 197-224 Issued 25 June 1987 197
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