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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 4785

Wilhelm Foissner, Igor Oleksiv, and Helga Muller; [Morphologie und Infraciliature einiger Ciliaten (Protozoa: Ciliophora) aus stagnierenden Gewassern] (Morphology and infraciliature of some Ciliates (Protozoa: Ciliophora) from Stagnant Waters). Arch.Protistenk 138:191-206, 1990

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The morphology and the infraciliature of some kinetofragminophoran and hypotrichous ciliates occurring in Lake Bodensee (Konstanz, FRG) and in a small pond at the University of Salzburg (Austria) were investigated. Pseudobalanion nov. gen. has a circular oral area which is nearly as wide as the body and surrounded by finger-like flaps. Its posteriorly shortened kineties are disposed meridionally. Morphogenesis is similar as in Urotricha, but the division axis is oblique. A dorsal brush (brosse) is absent. Thus, Pseudobalanion probably belongs to the Holophryidae. The very small (in vivo about 20x15 µm) type species, P. planctonicum, was discovered in large numbers in the plankton of Lake Bodensee. In the same sample occurred Urotricha furcata Schewiakoff, 1893, which is very similar to a recently redescribed Australian population. The genus Mucotrichidium nov. gen. has 1 short and 1 long ventral cirral row and an isolated cirrus close behind the peristome between the long ventral cirral row and the left marginal cirral row. Caudal and transverse cirri are present. This new genus probably belongs to the Spirofilidae. The type species, M. hospes (Ehrenberg, 1831) nov. comb., has been found in old mucus of Chironomus larvae at Salzburg. Paruroleptus gallina (Muller, 1786) is a new combination with Trichoda gallina Muller, 1786 and the Uroleptus musculus of Ehrenberg (1838) and Stein (1859). This species occurred in the same pond as M. hospes and differs from P. musculus Kahl, 1932 by many morphometric characteristers and the possession of distinct caudal cirri.