The ultrastructure of the infective oncosphere of the cestode Mosgovoyia ctenoides (Anoplocephalidae) is described. The surface of the infective oncosphere is covered by a thin cytoplasmic layer of tegument connected by a narrow cytoplasmic process with the binucleate subtegumental cell, situated deeper in the body. Below the basal matrix of the cytoplasmic layer of the tegument are situated wide bands of the peripheral, somatic musculature responsible for body movements. The 3 pairs of hooks and their muscles form a complex hook muscle system, responsible for coordinated hook action. Five major types of cells have been distinguished: (1) a binucleate subtegumental cell, (2) a binucleate penetration gland, (3) 2 nerve cells, (4) numerous somatic cells, and (5) about 6 germinative cells. The approximate number of cells is 24 (26 nuclei, including 2 syncytial structures). The results of this study, when compared with other published reports from other cestode taxa, support previous hypotheses that the progressive reduction of oncosphere cells is an adaptive feature in cestode evolution.
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October 2006
Research Article|
October 01 2006
CELLULAR ORGANIZATION OF THE ONCOSPHERE OF MOSGOVOYIA CTENOIDES (CESTODA: ANOPLOCEPHALIDAE)
Daniel Młocicki;
Daniel Młocicki
Stefański Institute of Parasitology, Polish Academy of Sciences, 51/55 Twarda Str., 00-818 Warsaw, Poland. bconn@berry.edu
† Department of Medical Biology, Medical University of Warsaw, 73 Nowogrodzka Str., 02-018 Warsaw, Poland
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Zdzisław Świderski;
Zdzisław Świderski
Stefański Institute of Parasitology, Polish Academy of Sciences, 51/55 Twarda Str., 00-818 Warsaw, Poland. bconn@berry.edu
‡ Department of General Biology and Parasitology, Medical University of Warsaw, 5 Chałubińskiego Str., 02-004 Warsaw, Poland
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Jordi Miquel;
Jordi Miquel
§ Laboratori de Parasitologia, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII s/n, E-08028 Barcelona, Spain
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Catarina Eira;
Catarina Eira
§ Laboratori de Parasitologia, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII s/n, E-08028 Barcelona, Spain
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David Bruce Conn
David Bruce Conn
‖ To whom correspondence should be addressed. School of Mathematical and Natural Sciences, Berry College, Mount Berry, Georgia 30149-5036
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J Parasitol (2006) 92 (5): 953–961.
Citation
Daniel Młocicki, Zdzisław Świderski, Jordi Miquel, Catarina Eira, David Bruce Conn; CELLULAR ORGANIZATION OF THE ONCOSPHERE OF MOSGOVOYIA CTENOIDES (CESTODA: ANOPLOCEPHALIDAE). J Parasitol 1 October 2006; 92 (5): 953–961. doi: https://doi.org/10.1645/GE-790R1.1
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