Protistology 3 (4) 233–241 (2004)
A new pelobiont protist Pelomyxa corona sp. n. (Peloflagellatea, Pelobiontida) Alexander O. Frolov 1, Ludmila V. Chystjakova 2 and Andrew V. Goodkov 2, 3 1 Zoological Institute RAS, St. Petersburg, Russia
Summary A new species of multinucleate pelobionts, Pelomyxa corona, is described. Morphology of the amoebae has been studied with the use of the light and the transmission electron microscope. The cells of P. corona are rounded. The cytoplasm is clearly differentiated into the marginal hyaloplasm and the endoplasm. Numerous hyaline pseudopodia of approximately equal length make the amoeba look like a "crown", which is reflected in the specific name. Ultrastructurally P. corona is rather similar to P. palustris, but a number of unique characters allows a reliable differentiation of these two species. The study of P. corona revealed a well-developed structured glycocalyx, the dictyosomes of the Golgi apparatus and fine pseudopodia armoured with bundles of microtubules. One species out of the set of the symbiotic bacteria characteristic of P. palustris is lacking in P. corona, but another bacterial species is present which has not been reported from pelobionts so far. Flagella have not been found. Key words: pelobionts, Peloflagellatea, Pelomyxa corona sp. n., Pelomyxa palustris, ultrastructure | Back to Contents | Load PDF | |