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Parasitology Research

, Volume 101, Issue 2, pp 373–383 | Cite as

Ultrastructure of the proglottid tegument (neodermis) of the cestode Echinophallus wageneri (Pseudophyllidea: Echinophallidae), a parasite of the bathypelagic fish Centrolophus niger

  • Larisa G. Poddubnaya
  • Tomáš ScholzEmail author
  • Roman Kuchta
  • Céline Levron
  • Magdaléna Bruňanská
Original Paper

Abstract

Ultrastructural data are provided on the tegument (or neodermis) of proglottids of the cestode Echinophallus wageneri Monticelli, 1890, the first representative of the family Echinophallidae (Pseudophyllidea), parasites of bathypelagic fish, studied using transmission and scanning electron microscopy. The surface of the ventral concave side of proglottids is covered with filiform microtriches about 1.7 μm long. Their glycocalyx, although very thick, is less extensively developed compared to that on digitiform microtriches localized on the dorsal side of the proglottids, which is also covered with filiform microtriches. The digitiform microtriches of the convex dorsal side are about 0.6 μm long, with a very short, rounded spine and the extraordinarily extensive glycocalyx seen as flocculent material. Short digitiform microtriches of E. wageneri seem to differ from microthrix types previously reported in other cestodes by transmission electron microscopy. The posterodorsal margin of all proglottids is typical in possessing a transverse band of large spiniform, tusk-shaped microtriches with a very long spine (approximately 13 μm in length), merged with filiform microtriches. Marked regional differences found in the morphology and distribution of microtriches on the proglottids of E. wageneri may be related to the different functions of the individual parts of the strobila because of the curling of the tapeworm body within the intestine of its fish host.

Keywords

Ventral Side Syncytial Layer Distal Cytoplasm Tegumental Syncytium Trypanorhynch Cestode 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

Specimens of E. wageneri were obtained during stays of R.K. at the Institute of Aquaculture, University of Stirling, Scotland, and his field trips on the research vessel “Scotia” of the Fisheries Research Services, Aberdeen, in 2004. These stays were supported by the Access to Research Infrastructure Action of the Improving Human Potential Programme of the European Community (contract HPRI-CT-2001-00180). The authors are also indebted to Dr. Andy P. Shinn, Institute of Aquaculture, University of Stirling, UK, for his support, to the staff of the Laboratory of Electron Microscopy (head J. Nebesářová), Institute of Parasitology, BC AS CR, České Budějovice, and the Centre of Electron Microscopy, Institute of Biology of Inland Waters, Borok, for invaluable technical assistance and providing facilities for TEM observations. The present study was supported by the Grant Agency of the Czech Republic (projects Nos. 206/03/1317, 524/03/H133, 524/04/0342 and 524/07/P039), by Russian Foundation of Fundamental Researches (RFFR, grant no. 05-04-48250), and research projects of the Institute of Parasitology, Academy of Sciences of the Czech Republic (Z60220518 and LC 522), Faculty of Biological Sciences, University of South Bohemia (MSM 6007665801), and Grant Agency of the Slovak Republic VEGA (project no. 2/4177/04).

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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Larisa G. Poddubnaya
    • 1
  • Tomáš Scholz
    • 2
    • 3
    Email author
  • Roman Kuchta
    • 2
    • 3
  • Céline Levron
    • 2
  • Magdaléna Bruňanská
    • 2
    • 4
  1. 1.Institute of Biology of Inland WatersRussian Academy of SciencesBorokRussia
  2. 2.Institute of ParasitologyBiology Centre of the Academy of Sciences of the Czech RepublicČeské BudějoviceCzech Republic
  3. 3.Faculty of Biological SciencesUniversity of South BohemiaČeské BudějoviceCzech Republic
  4. 4.Parasitological InstituteSlovak Academy of SciencesKošiceSlovak Republic

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