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  • 1
    Electronic Resource
    Electronic Resource
    Myxosoma funduli Kudo (Myxosporida) in Fundulus kansae: Ultrastructure of the Plasmodium Wall and of Sporogenesis (1979)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 26 (1979), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSISUltrastructure of the plasmodium wall and of sporogenesis were studied in Myxosoma funduli Kudo infecting the gills of Fundulus kansae (Garman). Plasmodia were located within the lamellar tissues adjacent to sinuses and capillaries. The plasmodium wall consisted of a single unit membrane which was continuous with numerous pinocytic canals extending into the parasite ectoplasm. The plasmodium membrane was covered by a surface coat of almost uniform thickness which prevented direct parasite-host cell contact. Numerous generative cells and cell aggregates, representing early stages of spore development, were seen in immature plasmodia. Later stages of spore development, including mature spores, were observed in older plasmodia. Sporogenesis was initiated by envelopment of one generative cell, the sporont, by a 2nd, nondividing cell, the envelope cell. The sporont and its progeny proceeded through a series of divisions until there were 10 cells, all compartmentalized within the envelope cell. Subsequently, the 10 cells became structurally differentiated and arranged into two 5-celled spore-producing units, each consisting of 1 binucleate sporoplasm and 2 capsulogenic cells, all surrounded by 2 valvogenic cells. Observations of later developmental stages revealed the major events of capsulogenesis, valvogenesis, and sporoplasm maturation, which occurred concomitantly during spore construction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1979.tb04198.x
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  • 2
    Electronic Resource
    Electronic Resource
    Two New Menosporine Gregarines, Hoplorhynchus acanthatholius N. Sp. and Steganorhynchus dunwoodyi N. G., N. Sp. (Apicomplexa: Eugregarinorida: Actinocephalidae) from Coenagrionid Damselflies (Odonata: Zygoptera) (1995)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 42 (1995), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: . Hoplorhynchus acanthatholius, n. sp. is described from Enallagma civile, the Civil Bluet damselfly. Trophozoites are solitary, lie in the mesenteron between the peritrophic membrane and the epithelium, and attain a maximum length of 850 μm. Epimerite ovoid to broadly ovoid; anterior margin bearing eight equidistant retroarcuate hooks; attached to protomerite by means of a vermicular stalk. Protomerite ovoid; deutomerite narrowly obvoid. Gametocysts spherical; diam 300 μm, sporulating by simple dehiscence in 48–72 h. Oocysts are characteristic of Menosporinae: smooth, biconical, crcscentic, uniform in size and shape. Steganorhynchus dunwoodyi, n. g., n. sp. is described from the damselfly Ischnura verticalis. The genus is characterized by an epimerite comprising an ovoid papilla enclosed in a retractable, globular sheath, borne on a long vermicular stalk. Trophozoites are solitary, lie in the mesenteron between the peritrophic membrane and epithelium, and attain a maximum length of 605 μm. Protomerite very broadly ovoid; deutomerite obvoid. Gametocysts spherical; diam 258 μm, sporulating by simple dehiscence in 48–72 h. Oocysts are characteristic of Menosporinae: smooth, biconical, crescentic, uniform in size and shape. The population dynamics of H. acanthatholius and S. dunwoodyi among damselfly populations in five Nebraska localities are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1995.tb01603.x
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  • 3
    Electronic Resource
    Electronic Resource
    Gregarina niphandrodes N. Sp. (Apicomplexa: Eugregarinorida) from Adult Tenebrio molitor (L.) with Oocyst Descriptions of Other Gregarine Parasites of the Yellow Mealworm (1991)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 38 (1991), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Gregarina niphandrodes, a new species of septate eugregarine, is described from the adult mealworm, Tenebrio molitor. Measurements given are means in μm. Gamonts in association. Nuclear diameter consistent, 35.5. Primite: protomerite hemispherical; length 59.5; width 91.2; deutomerite ovoid; length 173.4; width 145.6; total length 232.9. Length of protomerite/total length index 25.7. Length of deutomerite/total length index 74.3. Length of protomerite/length of deutomerite index 35.4. Width of protomerite/width of deutomerite index 63.5. Satellite: protomerite hemispherical; length 40.2; width 81.6; deutomerite ovoid; length 177.4; width 113.9; total length 217.6. Length of protomerite/total length index 19.0. Length of deutomerite/total length index 81.0. Length of protomerite/length of deutomerite index 23.8. Width of protomerite/width of deutomerite index 76.7. Gametocysts spherical, diameter 225, producing multiple oocyst chains under dry storage in 36–52 h. Oocysts very uniform in shape and size, dorsum doliform with angles squared by enclosing sheath, length 8.8, width 5.5; flattened dorsoventrad with mesad tumidus, pleuron height 2.2. Morphological measurements, indices, and oocyst descriptions are given for G. cuneata, G. polymorpha and G. steini.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1991.tb04819.x
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  • 4
    Electronic Resource
    Electronic Resource
    Monsterism in Dileptus (Ciliata) Fed on Planarians (Dugesia tigrina) (1963)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 10 (1963), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. The occurrence of monstrous individuals of Dileptus is reported. These monsters appeared in cultures which had been fed planarians for over 72 hr. The first abnormal forms to appear were giants, 700–1200 μ long, which were common in the cultures after 72 hr. Giants were occasionally observed to develop a large, non-contractile vacuole in the central region of the body after a week of feeding on planarians. A sequence of events is described in which this vacuole enlarged until the animal appeared to be a water-filled sphere which then collapsed into an amorphous blob. This blob then divided unevenly to produce as many as seven small Dileptus. The described morphological changes are presumed to be a result of Dileptus' feeding on planarians. The similarities between abnormal Dileptus and monstrous individuals of other species are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1963.tb01701.x
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  • 5
    Electronic Resource
    Electronic Resource
    Comparative Study of Ultrastructure of Interlamellar and Intralamellar Types of Henneguya exilis Kudo from Channel Catfish (1978)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 25 (1978), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. The inter- and intralamellar types of Henneguya exilis Kudo (Myxosporida) infections from channel catfish are similar in spore structure and sporogenesis, but differ in the structure of their plasmodium wall and surface coat and in their relationship with the host cells. The 2 clinical types differ also in the sites of development and growth patterns of plasmodia within a gill filament. Interlamellar plasmodia are limited by 2 outer unit membranes which give rise to both single-and double-membraned pinocytic canals. Intralamellar plasmodia are limited by a single outer unit membrane which gives rise to single-membraned pinocytic canals. Interlamellar plasmodia are covered by a fine granular coat of highly variable thicknesses; in some regions there is direct contact between the parasite and cells of the host. There is some evidence that host cell cytoplasm as well as interstitial material are taken in by interlamellar plasmodia. In contrast, intralamellar plasmodia are covered by a fine granular coat of almost uniform thickness, which prevents direct contact between the parasite and cells of the host; probably only interstitial material is taken by these plasmodia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1978.tb03868.x
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