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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 4386

Dimas Fernandez-Galiano and Pilar Calvo; Redescription of Phacodinium metchnikoffi (Ciliophora, Hypotrichida): General Morphology and Taxonomic Position. J.Protozool. 39(4):443-448, 1992

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Living and stained specimens of Phacodinium metchnikoffi, collected near Madrid, Spain, were studied under light microscopy. Infraciliature was stained using a silver-impregnation procedure. The somatic infraciliature is composed of a relatively small number of discontinuous kineties, formed by groups of few kinetosomes (pallets). The buccal ciliature is composed of an adoral zone of membranelles and a paroral formation otherwise unknown in ciliates, with many short kineties, which lie on a rigid stem. We propose that P. metchnikoffi is primitive hypotrich and, consequently, we present a new classification system for hypotrichs.