Transmission electron micrograph studies of developing oncospheral envelopes ofFimbriaria fasciolaris (Hymenolepididae) (original) (raw)

Abstract

Studies of the ultrastructure of oncospheral envelopes of_Fimbriaria fasciolaris_ in utero using transmission electron microscopy revealed three primary layers: uterine, outer and inner envelopes. A capsule was not found. The uterine envelope surrounds up to 12 oncospheres enclosed by the outer and inner oncospheral envelopes. The secondary envelopes arise during the embryos' development and, in part, are formed in a way different from that described for other Hymenolepididae. A thin, folded shell is a derivative of the embryo and the mother organism. The embryophore and oncospheral “membrane” originate intracellularly from the inner oncospheral envelope. The mode of formation and final shape of the definitive oncospheral envelopes in_F. fasciolaris_ and other Hymenolepididae species as well as their terminology are discussed.

Access this article

Log in via an institution

Subscribe and save

• Starting from 10 chapters or articles per month
• Access and download chapters and articles from more than 300k books and 2,500 journals
• Cancel anytime View plans

Buy Now

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

• Chomicz L, Czubaj A (1987) The ultrastructure of embryonic envelopes of_Fimbriaria fasciolaris_ (Pallas 1781) Cestoda, Hymenolepididae (in Polish). Abstracts of communications, 15th Meeting of the Polish Parasitological Society, Katowice, September 24–26, p 20
• Chomicz L, Czubaj A (1988) Further studies on the ultrastructure of embryonic envelopes of_Fimbriaria fasciolaris_ (Pallas 1781), Cestoda, Hymenolepididae. Abstracts, EMOP V, Budapest, September 4–9, p 138
  Google Scholar
• Chomicz L, Czubaj A, Walski M (1988) Electron microscope studies on the embryonic envelopes of_Diorchis elisae_ (Skrjabin 1914) Spassky et Frese, 1961, Cestoda, Hymenolepididae. Abstracts, EMOPV Budapest, September 4–9, p 138
  Google Scholar
• Fairweather I, Threadgold LTT (1981)Hymenolepis nana: the fine structure of the embryonic envelopes. Parasitology 82:429–443
  Google Scholar
• Kashin WA, Pluzhnikov LT (1983) Cytomorphology of mature eggs of_Fimbriaria fasciolaris_ (Cestoidea, Hymenolepididae) (in Russian, with English summary). Parasitologiya 17:430–435
  Google Scholar
• Lethbridge RC (1976) The architecture of the egg-shell of_Hymenolepis diminuta_. Int J Parasitol 6:87–90
  Google Scholar
• Lethbridge RC (1980) The biology of the oncosphere of cyclophyllidean cestodes. Helminthol Abstr [A] 49:59–72
  Google Scholar
• Mehlhorn H, Dubremetz JF, Franz M, Gustafsson M, Peters W, Taraschewski H, Waldorf V, Voight WP (1988) Morphology. In: Mehlhorn H (ed) Parasitology in focus. Springer, Berlin Heidelberg, New York, pp 161–311
  Google Scholar
• Pence DB (1970) Electron microscope and histochemical studies on the eggs of_Hymenolepis diminuta_. J Parasitol 56:84–97
  Google Scholar
• Rybicka K (1966) Embryogenesis in cestodes. Adv Parasitol 4:107–186
  Google Scholar
• Rybicka K (1972) Ultrastructure of embryonic envelopes and their differentiation in_Hymenolepis diminuta_ (Cestoda). J Parasitol 58:849–863
  Google Scholar
• Swiderski Z (1975) Comparative fine structure of cestode embryos. Proceedings, 2nd European Multicolloquy of Parasitology, Trogir, September 1–6, pp 265–272
• Swiderski Z (1986) Ultrastructure of the parenchymatic capsules of the cestode_Inermicapsifer madagascariensis_ (Cyclophyllidea: Anoplocephalidae, Inermicapsiferinae). Proceedings, 11th International Congress on Electron Microscopy, Kyoto
• Ubelaker JE (1980) Structure and ultrastructure of the larvae and metacestodes of_Hymenolepis diminuta_. In: Arai HP (ed) Biology of the tapeworm_Hymenolepis diminuta_. Academic Press, London, pp 59–156
  Google Scholar
• Wilanowicz H (1978) New aspects of biology of_Fimbriaria fasciolaris_ (Pallas 1781) (in Polish). PhD Dissertation, University of Warszawa

Download references

Author information

Authors and Affiliations

1. Department of General Biology and Parasitology, Medical Academy, Chałubińskiego 5, 02-004, Warsaw, Poland
   L. Chomicz
2. Department of Cytology, University of Warsaw, Krakowskie Przedmieście 26/28, 00-927, Warsaw, Poland
   A. Czubaj

Authors

1. L. Chomicz
2. A. Czubaj

Rights and permissions

About this article

Cite this article

Chomicz, L., Czubaj, A. Transmission electron micrograph studies of developing oncospheral envelopes of_Fimbriaria fasciolaris_ (Hymenolepididae).Parasitol Res 77, 503–508 (1991). https://doi.org/10.1007/BF00928418

Download citation

• Accepted: 19 January 1991
• Issue date: June 1991
• DOI: https://doi.org/10.1007/BF00928418

Keywords