Hostname: page-component-78c5997874-fbnjt Total loading time: 0 Render date: 2024-11-10T05:47:08.410Z Has data issue: false hasContentIssue false
  • English
  • Français

An ultrastructural study of the cercarial excretory system in Bucephaloides gracilescens and Prosorhynchus squamatus

Published online by Cambridge University Press:  12 April 2024

I.M. Podvyaznaya  and
K.V. Galaktionov
I.M. Podvyaznaya*
Affiliation:
The Laboratory of Parasitic Worms, St Petersburg, 199034, Russia
K.V. Galaktionov
Affiliation:
The White Sea Biological Station, Zoological Institute, Russian Academy of Sciences, St Petersburg, 199034, Russia
*
*Fax: (+ +7812) 328 2941 Email: podvyaznaya_vermes@zin.ru
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The ultrastructure of the flame cells, capillaries, collecting tubes, excretory bladder, excretory atrium, caudal vesicle, lateral caudal ducts and excretory pores of cercariae of Bucephaloides gracilescens (Rudolphi, 1819) Hopkins, 1954 and Prosorhynchus squamatus Odhner, 1905 (Digenea: Bucephalidae) is described. Both species are essentially similar except for some details. The terminal parts of the protonephridia have all the structural features that are typical of trematodes. The collecting tubes in the cercarial body are composed of cells that are wrapped around the lumen. The main collecting tubes are joined to the excretory bladder syncytium by septate junctions. Features of P. squamatus excretory bladder epithelium indicate that it is involved in secretory activity, but this is not the case in B. gracilescens. In both species the luminal surface of the excretory bladder epithelium is increased by lamellae, and the basal plasma membrane forms invaginations. In the bladder syncytium of P. squamatus both apical lamellae and basal invaginations are more developed and mitochondria are also more numerous. The excretory atrium is lined by a syncytium with nucleated cytons located in the surrounding parenchyma. The atrium lining is not continuous with the body tegument and possesses specific secretory inclusions and a thick glycocalyx. Septate junctions connect the atrium syncytium to the excretory bladder epithelium at its anterior end and to the syncytial excretory epithelium lining the caudal vesicle and the lateral caudal ducts at its posterior. In the excretory pores the caudal duct syncytium is joined to the tegument by septate desmosomes.

Type
Review Article
Information
Journal of Helminthology , Volume 78 , Issue 2 , June 2004 , pp. 147 - 158
Copyright
Copyright © Cambridge University Press 2004

References

Bennett, C.E. Threadgold, L.T. (1973) Electron microscope studies of Fasciola hepatica. XIII. Fine structure of newly excysted juvenile. Experimental Parasitology 34: 85–99.CrossRefGoogle Scholar
Bennett, C.E. (1977) Fasciola hepatica : development of excretory and parenchymal system during migration in the mouse. Experimental Parasitology 41: 43–53.CrossRefGoogle ScholarPubMed
Ebrahimzadeh, A. Kraft, M. (1971) Ultrastrukturelle Untersuchungen zur Anatomie der Cercarien von Schistosoma mansoni. II. Das Exkretionssystem. Zeitschrift für Parasitenkunde 36: 265–290.CrossRefGoogle Scholar
Gibson, D.I. (1974) Aspects of the ultrastructure of the daughter sporocyst and cercaria of Podocotyle staffordi Miller, 1941 (Digenea: Opecoelidae). Norwegian Journal of Zoology 22: 237–252.Google Scholar
Göbel, E.P. Pan, J.P. (1985) Ultrastructure of the daughter sporocyst and developing cercaria of Schistosoma japonicum in experimentally infected snails, Oncomelania hupensis hupensis . Zeitschrift für Parasitenkunde 71: 227–240.CrossRefGoogle ScholarPubMed
Kniskern, V.B. (1952) Studies on the trematode family Bucephalidae Poche, 1907. Part 2. The life history of Rhipidocotyle septpapillata Krull, 1934. Transactions of the American Microscopical Society 71: 317–340.CrossRefGoogle Scholar
Kruidenier, F.J. (1959) Ultrastructure of the excretory system of cercariae. Journal of Parasitology 45 (Suppl.), 59 (abstract).Google Scholar
Krupa, P.L., Cousineau, G.H. Bal, A.K. (1969) Electron microscopy of the excretory vesicle of a trematode cercaria. Journal of Parasitology 55: 993–1003.CrossRefGoogle Scholar
Leong, C.H.D. Howell, M.J. (1971) Formation and structure of the cyst wall of Stictodora lari (Trematoda: Heterophyidae). Zeitschrift für Parasitenkunde 35: 340–350.CrossRefGoogle Scholar
Malkova, I.I. Galaktionov, K.V. (1989) Electron microscope study of microphallid cercariae excretory system (Trematoda: Microphallidae). Parasitologiya 23: 511–517 (in Russian).Google Scholar
Matthews, R.A. (1973) The life-cycle of Prosorhynchus crucibulum (Rudolphi, 1819) Odhner, 1905, and a comparison of its cercaria with that of Prosorhynchus squamatus Odhner, 1905. Parasitology 66: 133–164.CrossRefGoogle Scholar
Matthews, R.A. (1974) The life-cycle of Bucephaloides gracilescens (Rudolphi, 1819) Hopkins, 1954 (Digenea: Gasterostomata). Parasitology 68: 1–12.CrossRefGoogle ScholarPubMed
Mattison, R.G., Hanna, R.E.B. Nizami, W.A. (1992) Ultrastructure and histochemistry of the protonephridial system of juvenile Paramphistomum epiclitum and Fischoederius elongatus (Paramphistomidae: Digenea) during migration in Indian ruminants. International Journal for Parasitology 22: 1103–1115.CrossRefGoogle ScholarPubMed
Niewiadomska, K. Czubaj, A. (1996) Structure and TEM ultrastructure of the excretory system of the cercaria and daughter sporocyst of Diplostomum pseudospathaceum Niew., 1984 (Digenea, Diplostomidae). Acta Parasitologica 41: 167–181.Google Scholar
Niewiadomska, K. Czubaj, A. (2000) Ultrastructure of the excretory system in the metacercaria of Diplostomum pseudospathaceum Niew., 1984 (Digenea). Acta Parasitologica 45: 307–321.Google Scholar
Orido, Y. (1987) Metamorphosis of the excretory system of Paragonimus ohirai (Trematoda), with special reference to its functional significance. Journal of Morphology 194: 303–310.CrossRefGoogle ScholarPubMed
Popiel, I. (1977) The ultrastructure of the excretory bladder of the free-living cercariae and metacercariae of Cercaria stunkardi Palombi, 1934 (Digenea, Opecoelidae). Zeitschrift für Parasitenkunde 51: 249–260.CrossRefGoogle Scholar
Powell, E.C. (1972) Optical and electron microscope studies on the excretory bladder of the supposed epitheliocystid cercaria of Ochetosoma aniarum . Zeitschrift für Parasitenkunde 40: 19–30.CrossRefGoogle ScholarPubMed
Powell, E.C. (1973) Studies on the excretory ‘bladder’ and caudal ducts of the supposed anepitheliocystid cercaria of Schistosoma mansoni . Zeitschrift für Parasitenkunde 43: 43–52.CrossRefGoogle ScholarPubMed
Powell, E.C. (1975) The ultrastructure of the excretory bladder in the supposed anepitheliocystid cercariae of Posthodiplostomum minimum (Maccallum, 1921). Iowa State Journal of Research 49: 259–262.Google Scholar
Rees, F.G. (1977) The development of the tail and the excretory system in the cercaria of Cryptocotyle lingua (Creplin) (Digenea: Heterophyidae) from Littorina littorea (L.). Proceedings of the Royal Society of London B 195, 425–452.Google ScholarPubMed
Rohde, K. (2001) Protonephridia as phylogenetic characters. pp. 203–216 in Littlewood, D.T.J. & Bray, R. (Eds) Interrelations of the Platyhelminthes. London, Taylor & Francis.Google Scholar
Rohde, K. Watson, N.A. (1992) Ultrastructure of the developing protonephridial system of the cercaria of Philophthalmus sp. (Trematoda, Digenea). Parasitology Research 78: 368–375.CrossRefGoogle ScholarPubMed
Soboleva, T.N., Zdarska, Z., Sterba, J. Valkounova, J. (1988) Ultrastructure of the excretory system of Brachylaimus aequans (Trematoda, Brachylaimoidea). Folia Parasitologica 35: 335–339.Google ScholarPubMed
Woodhead, A.E. (1929) Life history studies on the trematode family, Bucephalidae. Transactions of the American Microscopical Society 48: 256–275.CrossRefGoogle Scholar