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PubMed1975

Remarks on the status of the genus Leucocytozoon Sambon, 1908.

Authorship of the genus Leucocytozoon has been variously assigned to several investigatiors, especially Danilewsky and Ziemann. Recently Hsu, Campbell & Levine (1973) have credited it to Berestneff. It is herein submitted that they erred in doing so and in relegating Akiba Bennett, Garnham & Fallis, 1965 and Saurocytozoon Lainson & Shaw, 1969 to synonymy with it. An attempt is made to clarify the confusion that has increasingly surrounded the genus Leucocytozoon, and it is recommended that the type species (by designation) should be Leucocytozoon majoris (Laveran, 1902), one of a mixture of organisms earlier lumped together under a name (Haemamoeba Grassi & Feletti, 1890) currently reserved for an avian subgenus of Plasmodium Marchiafava & Celli, 1885. We conclude that the generic name should be credited to Sambon, the 1st author to present an unequivocal description of the genus.

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PubMed1976

Ultrastructure of the peripheral zone of a Glugea-induced xenoma.

The Glugea stephani-induced xenoma in the winter flounder, Pseudopleuronectes americanus, is a large spherical host-parasite complex, up to 4.0 mm in diameter, with the host and parasite components of the xenoma being most active in the peripheral zone. The xenoma has an extensive periodic acid-silver methenamine-positive surface coat covering the plasma membrane. The surface of this membrane is amplified by the presence of numerous folds and fine tubular extensions. The peripheral zone of the xenoma contains many host-cell mitochondria in addition to numerous microsporidan parasites. At the ultrastructural level, the peripheral zone of the host-cell cytoplasm appears normal. Inside the peripheral region of the 0.4-1.0 mm xenoma, the host-cell component largely disintegrates in the presence of microsporidan parasites undergoing sporogenesis.

Animals↗
PubMed1986

Tritrichomonas mobilensis n. sp. (Zoomastigophorea: Trichomonadida) from the Bolivian squirrel monkey Saimiri boliviensis boliviensis.

A trichomonad flagellate, Tritrichomonas mobilensis n. sp., is described from the large intestine of the squirrel monkey, Saimiri boliviensis boliviensis. The organism has a lanceolate body 7-10.5 micrometers in length; a well developed undulating membrane; a stout, tubular axostyle with periaxostylar rings that terminate in a cone-shaped segment projecting from the posterior end of the cell; and a moderately wide costa. The anterior flagella are about as long as the body, and the recurrent flagellum is of the acroneme type. All its characteristics suggest that the new species belongs in the Tritrichomonas augusta type of the subfamily Tritrichomonadinae.

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PubMed1987

Intestinal ciliated protozoa of African rhinoceros: two new genera and five new species from the white rhino (Ceratotherium simum Burchell, 1817).

This report represents the first published information on intestinal ciliated protozoa in the African white rhinoceros (Ceratotherium simum Burchell, 1817). Two new genera which do not relate to any known ciliated protozoa from the intestines of mammals and five new species are described. The ciliates were found in the colon of three of these free-living hindgut-fermenting grazers that were shot in widely spaced districts in southern Africa. Phalodinium digitalis n. gen., n. sp., Arachnodinium noveni n. gen., n. sp., Monoposthium vulgaris n. sp., M. bracchium n. sp., and M. latus n. sp. constituted between 1% and 10% of the total ciliate population (ca. 1 X 10(5)/ml digesta) in the ascending colon. Exceedingly small numbers were observed in the descending colon, indicating temporary accommodation only.

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