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Zoomorphology

, Volume 107, Issue 2, pp 88–95 | Cite as

Ultrastructure of the lycophora larva of Gyrocotyle urna (Cestoda, Gyrocotylidea)

III. the protonephridial system
  • W. E. R. Xylander
Article

Summary

The ultrastructure of the protonephridial system of the lycophore larva of Gyrocotyle urna Grube and Wagener, 1852, is described. It consists of six terminal cells, at least two proximal canal cells, two distal canal cells and two nephridiopore cells. The terminal cells and the proximal canal cell build up the filtration weir with its two circles of weir rods. The proximal canal cell constitutes a solid, hollow cylinder without a cell gap and desmosome. The distal canal cell is characterized by a strong reduction of the canal lumen by irregularly shaped microvilli. The nephridiopore region is formed by a nephridiopore cell; its cell body is located at some distance proximally within the larva. The connection among different canal cells is brought about by septate desmosomes. Morphological, evolutionary and functional aspects of the protonephridial system within Platyhelminthes are discussed. The structure of the proximal canal cells without a desmosome is considered an autapomorphy of Cestoda.

Keywords

Developmental Biology Cell Body Strong Reduction Hollow Cylinder Functional Aspect 
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.

Abbreviations

ci

cilia of the terminal cell

Co

distal canal cell

col

lumen of the distal canal cell

Ep

epidermis

er

outer rods of the filtration weir

il

inner leptotriches

ir

inner rods of the filtration weir

ld

lipid droplets

mt

microtubule

mv

microvilli

Nc

nephridiopore cell

Ne

neodermis anlage cells

nu

nucleus

pC

proximal canal cell

ro

ciliary rootlets

sd

septate desmosome

Tc

terminal cell

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References

  1. Bartolomaeus T (1985) Ultrastructure and development of the protonephridia of Lineus viridis (Nemertini). Microfauna Marina 2:61–83Google Scholar
  2. Brooks DR, O'Grady RT, Glen DR (1985) The phylogeny of the Cercomeria Brooks, 1982 (Platyhelminthes). Proc Helminthol Soc Wash 52:1–20Google Scholar
  3. Brüggemann J (1986) Feinstruktur der Protonephridien von Paromalostomum proceracauda (Plathelminthes, Macrostomida). Zoomorphology 106:147–154Google Scholar
  4. Clement P (1980) Phylogenetic relationships of rotifers, as derived from photoreceptor morphology and other ultrastructural analyses. Hydrobiologia 73:93–117Google Scholar
  5. Ebrahimzadeh A, Kraft M (1971) Ultrastrukturelle Untersuchungen zur Anatomie der Cercarien von Schistosoma mansoni: II. Das Exkretionssystem. Z Parasitenkol 36:265–290Google Scholar
  6. Ehlers U (1984) Phylogenetisches System der Plathelminthes. Verh Naturwiss Ver Hamburg 27:291–294Google Scholar
  7. Ehlers U (1985a) Das Phylogenetische System der Plathelminthes. Gustav Fischer Verlag Stuttgart New York, pp 1–317Google Scholar
  8. Ehlers U (1985b) 9. Phylogenetic relationships within the Platyhelminthes. In: Conway Morris S, George JD, Gibson R, Platt HM (eds) The origin and relationships of lower invertebrates. Oxford University Press Oxford, pp 143–158Google Scholar
  9. Ehlers U (1986) Comments on a phylogenetic system of the Platyhelminthes. Hydrobiologia 132:1–12Google Scholar
  10. Ehlers U, Sopott-Ehlers B (1986) Vergleichende Ultrastruktur von Protonephridien: ein Beitrag zur Stammesgeschichte der Plathelminthen — Comparative ultrastructure of protonephridia: a contribution to the phylogeny of the Plathelminthes. Verh Dtsch Zool Ges 79:168–169Google Scholar
  11. Ehlers U, Sopott-Ehlers B (1987) Zum Protonephridialysystem von Invenusta paracnida (Plathelminthes, Proseriata). Microfauna Marina (in press)Google Scholar
  12. Eklu-Natey DT, Wüest J, Swiderski Z, Striebel HP, Huggel H (1985) Comparative scanning electron microscope (SEM) study of miracidia of four human Schistosome species. Int J Parasitol 15:33–42Google Scholar
  13. Howells RE (1969) Observations on the protonephridial system of the cestode, Moniezia expansa (Rud., 1805). Parasitology 59:449–459Google Scholar
  14. Ishii S (1980a) The ultrastructure of the protonephridial flame cell of the freshwater planarian Bdellocephala brunnea. Cell Tissue Res 206:441–449Google Scholar
  15. Ishii S (1980b) The ultrastructure of the protonephridial tubules of the freshwater planarian Bdellocephala brunnea. Cell Tissue Res 206:451–458Google Scholar
  16. Køie M (1971) On the histochemistry and ultrastructure of the tegument and associated structures of the cercaria of Zoogonoides viviparus in the first intermediate host. Ophelia 9:165–206Google Scholar
  17. Lumsden RD, Hildreth MB (1983) The fine structure of adult tapeworms. In: Arme C, Pappas PW (eds) Biology of the Eucestoda (Vol 1). Academic Press, London New York Paris San Diego San Francisco Sao Paulo Sydney Tokyo Toronto, pp 177–233Google Scholar
  18. Lumsden RD, Specian R (1980) The morphology, histology, and fine structure of the adult stage of the cyclophyllidean tapeworm. In: Arai HP (ed) Biology of the tapeworm Hymenolepis diminuta. Academic Press, New York London Toronto Sydney San Francisco, pp 157–280Google Scholar
  19. Malmberg G (1971) On the procercoid protonephridial systems of three Diphyllobothrium species (Cestoda, Pseudophyllidea) and Janicki's cercomer theory. Zool Scr 1:43–56Google Scholar
  20. Malmberg G (1972) On the early development of the protonephridial system in some species belonging to the genera Diphyllobothrium, Triaenophorus and Schistocephalus (Cestoda, Pseudophyllidea). Zool Scr 1:227–228Google Scholar
  21. Malmberg G (1974) On the protonephridial system of Gyrocotyle and the evolution of Cercomeromorphae (Platyhelminthes). Zool Scr 3:65–81Google Scholar
  22. McKanna JA (1968a) Fine structure of the protonephridial system in Planaria: I. Flame cells. Z Zellforsch 92:509–523Google Scholar
  23. McKanna JA (1968b) Fine structure of the protonephridial system in Planaria: II. Ductules, collecting ducts and osmoregulatory cells. Z Zellforsch 92:524–535Google Scholar
  24. Mehlhorn H, Piekarski G (1985): Grundriß der Parasitenkunde, 2nd edn. UTB Gustav Fischer Verlag Stuttgart, pp 1–359Google Scholar
  25. Moraczewski J (1981) Fine structure of some Catenulida (Turbellaria, Archoophora). Zool Pol 28:367–415Google Scholar
  26. Pan SCT (1980) The fine structure of the miracidium of Schistosoma mansoni. J Invertebr Pathol 36:307–372Google Scholar
  27. Rees G (1977) The development of the tail and the excretory system in the cercaria of Cryptocotyle lingua (Creplin) (Digenea: Heterophyidae from Littorina littorea (L.)). Proc R Soc Lond [Biol] 195:425–452Google Scholar
  28. Rohde K (1972) The Aspidogastrea, especially Multicotyle purvisi Dawes, 1941. Adv Parasitol 10:78–151Google Scholar
  29. Rohde K (1982) The flame cells of a monogenean and an aspidogastrean, not composed of two interdigitating cells. Zool Anz 209:311–314Google Scholar
  30. Rohde K (1986) Ultrastructure of the flame cells and protonephridial capillaries of Temnocephala; implications for the phylogeny of parasitic Platyhelminthes. Zool Anz 216:39–47Google Scholar
  31. Rohde K, Georgi M (1983) Structure and development of Austramphilina elongata Johnston, 1931 (Cestodaria: Amphilinidea). Int J Parasitol 13:273–287Google Scholar
  32. Smyth JD, Halton DW (1983) The physiology of trematodes, 2nd edn. Cambridge University Press Cambridge London New York New Rochelle Melbourne Sydney, pp 1–446Google Scholar
  33. Swiderski Z, Euzet L, Schönenberger N (1975) Ultrastructures du systeme nephridien des cestodes Catenotaenia pusilla (Goeze, 1782), Hymenolepis diminuta (Rudolphi, 1819), Inermicapsifer madagascariensis (Davaine, 1870) Baeri, 1956. Cellule 71:7–18Google Scholar
  34. von Bonsdorff CH, Telkkä A (1966) The flagellar structure of the flame cell in the fish tapeworm (Diphyllobothrium latum). Z Zellforsch 70:169–179Google Scholar
  35. Warner FD (1969) The fine structure of the protonephridia in the rotifer Asplanchna. J Ultrastruct Res 29:499–524Google Scholar
  36. Wessing A, Polenz A (1974) Structure, development and function of the protonephridia in the trochophores of Pomatoceros triqueter (Annelida, Polychaeta, Sedentaria). Cell Tissue Res 156:21–33Google Scholar
  37. Wilson RA (1969) The fine structure of the protonephridial system in the miracidium of Fasciola hepatica. Parasitology 59:461–467Google Scholar
  38. Wilson RA, Webster LA (1974): Protonephridia. Biol Rev 49:127–160Google Scholar
  39. Xylander WER (1986) Ultrastrukturelle Befunde zur Stellung von Gyrocotyle im System der parasitischen Plathelminthen — Ultrastructural results concerning the position of Gyrocotyle within parasitic Plathelminthes. Verh Dtsch Zool Ges 79:193Google Scholar
  40. Xylander WER (1987a) Ultrastructure of the lycophora larva of Gyrocotyle urna (Cestoda, Gyrocotylidea). I. Epidermis, neodermis anlage and body musculature. Zoomorphology 106:352–360Google Scholar
  41. Xylander WER (1987b) Das Protonephridialsystem der Cestoda: Evolutive Veränderungen und ihre mögliche funktionelle Bedeutung. — The protonephridial system in Cestoda: evolutionary changes and their possible functional significance. Verh Dtsch Zool Ges (in press)Google Scholar

Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • W. E. R. Xylander
    • 1
    • 2
  1. 1.II. Zoologisches Institut der Universität GöttingenGöttingenFederal Republic of Germany
  2. 2.Institut für Allgemeine und Spezielle Zoologie der Justus-Liebig-UniversitätGießenFederal Republic of Germany

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