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Spermatogenesis in the hermaphroditic Digenea (Trematoda)

Published online by Cambridge University Press:  06 April 2009

R. A. R. Gresson
R. A. R. Gresson
Affiliation:
Department of Zoology, The Queen's University of Belfast, Northern Ireland
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Extract

While some variation of detail may be found in different species of the hermaphroditic Digenea, the process of spermatogenesis conforms to a common plan throughout the group. There is divergence of opinion concerning the interpretation of the structure of the ripe spermatozoon.

In the testis of a young animal, primary, secondary and tertiary spermatogonia are present. The tertiary spermatogonia divide to give a group of eight primary spermatocytes that undergo the first division of the meiotic phase to form sixteen secondary spermatocytes. As a result of the second division of the meiotic phase, the sixteen secondary spermatocytes give a group of thirty-two spermatids that through a complicated series of changes are transformed into spermatozoa. During spermateleosis much of the cytoplasm of the late spermatid is sloughed off.

Recent research, including the application of the Feulgen technique, the examination of living material, and electron microscopy, supports the view that the ripe spermatozoon is composed of an elongate head, and a flagellum. The head, with the exception of its external sheaths, consists of nuclear material.

The flagellum of the sperm of Fasciola hepatica is Feulgen-negative and is composed of a proximal and a distal region. Its proximal part is provided with two axial filaments, a middle fibril and an external sheath. The axial filaments and the middle fibril are continued into the distal region where the external sheath appears to be absent. The external sheath of the flagellum of the sperm of Haematoloechus ( = Ostiolum) medioplexus is said to be composed of thirty-six fibrils. Claims that the flagellum of some digeneans contains a centriole, a middle-piece, and mitochondria have not so far been substantiated by means of electron microscopy.

Type
Research Article
Information
Parasitology , Volume 55 , Issue 1 , February 1965 , pp. 117 - 125
Copyright
Copyright © Cambridge University Press 1965

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References

Afzelius, B. (1959). Electron microscopy of the sperm tail. Results obtained with a new fixative. J. biophys. biochem. Cytol. 5, 269.CrossRefGoogle ScholarPubMed
Anderson, M. G. (1935). Gametogenesis in the primary generation of a digenetic trematode, Proterometra macrostoma Horsfall 1933. Trans. Am. micr. Soc. 54, 271.CrossRefGoogle Scholar
Britt, H. G. (1947). Chromosomes of digenetic trematodes. Am. Nat. 81, 276.CrossRefGoogle ScholarPubMed
Burton, P. R. (1960). Gametogenesis and fertilization in the frog lung fluke, Haematoloechus medioplexus Stafford (Trematoda: Plagiorchiidae). J. Morph. 107, 93.CrossRefGoogle ScholarPubMed
Cable, R. M. (1931). Studies on the germ cell cycle of Cryptocotyle lingua. I. Gametogenesis in the adult. Quart. J. micr. Sci. 74, 563.Google Scholar
Chen, Pin-Dji (1937). The germ cell cycle in the trematode Paragonimus kellicotti Ward. Trans. Am. micr. Soc. 56, 208.CrossRefGoogle Scholar
Ciordia, H. (1956). Cytological studies of the germ cell cycle of the trematode family Bucephalidae. Trans. Am. micr. Soc. 75, 103.CrossRefGoogle Scholar
Dhingra, O. P. (1954 a). Gametogenesis and fertilization in Isoparorchis eurytremum. Res. Bull. Panjab Univ. 44, 21.Google Scholar
Dhingra, O. P. (1954 b). Taxonomic values of chromosomes and cytoplasmic inclusions in a digenetic trematode, Phyllodistomum spatula. Res. Bull. Panjab Univ. 51, 101.Google Scholar
Dhingra, O. P. (1954 c). Spermatogenesis of a digenetic trematode, Cyclocoelium bivesiculatum. Res. Bull. Panjab Univ. 61, 159.Google Scholar
Dhingra, O. P. (1955 a). Spermatogenesis of a digenetic trematode, Cotylophoron elongatum. Res. Bull. Panjab Univ. 64, 1.Google Scholar
Dhingra, O. P. (1955 b). Spermatogenesis of a digenetic trematode, Gastrothylax crumenifer. Res. Bull. Panjab Univ. 65, 11.Google Scholar
Dhingra, O. P. (1955 c). Gametogenesis, fertilization and cleavage in Asymphlodora sp. Res. Bull. Panjab Univ. 66, 19.Google Scholar
Dingler, M. (1910). Über die spermatogenese des Dicrocoelium lanceolatum Stil. et Hass. (Distomum lanceolatum). Arch. Zellforsch. 4, 672.Google Scholar
Dunn, M. C. (1959). Studies on the germ cell cycle of Neorenifer wardi (Byrd, 1936). Trans. Am. micr. Soc. 78, 385.CrossRefGoogle Scholar
Franzén, Å. (1956). On spermiogenesis, morphology of the spermatozoon, and biology of fertilization among invertebrates. Zool. Bidr. Uppsala, 31, 355.Google Scholar
Govaert, J. (1960). Étude cytologique et cytochemique des cellules de la lignée germinative chez Fasciola hepatica. Expl Parasit. 9, 141.CrossRefGoogle Scholar
Gresson, R. A. R. (1957). Spermateleosis in Fasciola hepatica. Quart. J. micr. Sci. 98, 493.Google Scholar
Gresson, R. A. R. (1958). The gametogenesis of the digenetic trematode, Sphaerostoma bramae (Müller) Lühe. Parasitology, 48, 293.CrossRefGoogle ScholarPubMed
Gresson, R. A. R. (1962). Spermatogenesis of a cestode. Nature, Lond., 194, 397.CrossRefGoogle ScholarPubMed
Gresson, R. A. R. (1964). Oogenesis in the hermaphroditic Digenea (Trematoda). Parasitology, 54, 409.CrossRefGoogle Scholar
Gresson, R. A. R. & Perry, M. M. (1961). Electron microscope studies of spermateleosis in Fasciola hepatica L. Expl Cell Res. 22, 1.CrossRefGoogle ScholarPubMed
Guilford, H. G. (1955). Gametogenesis in Heronimus chelydrae Macallum. Trans. Am. micr. Soc. 74, 182.CrossRefGoogle Scholar
Hendelberg, J. (1962). Paired flagella and nucleus migration in the spermiogenesis of Dicrocoelium and Fasciola (Digenea, Trematoda). Zool. Bidr. Uppsala, 35, 569.Google Scholar
John, B. (1953). The behaviour of the nucleus during spermatogenesis in Fasciola hepatica. Quart. J. micr. Sci. 94, 41.Google Scholar
Jones, E. J. (1932). Fertilization and egg formation in a digenetic trematode, Podocotyle atomon. Parasitology, 24, 545.CrossRefGoogle Scholar
Jones, A. W., Mounts, B. W. & Wolcott, G. B. (1945). Macravestibulum kepneri n.sp.; a morphological and cytological study of a pronocephalid trematode. J. Morph. 77, 285.CrossRefGoogle ScholarPubMed
Markell, E. K. (1943). Gametogenesis and egg-shell formation in Probilotrema californiense Stunkard, 1935 (Trematoda: Gorgoderidae). Trans. Am. micr. Soc. 62, 27.CrossRefGoogle Scholar
Nez, M. M. & Short, R. B. (1957). Gametogenesis in Schistosomatium douthitti (Cort) (Schistosomatidae: Trematoda). J. Parasit. 43, 167.CrossRefGoogle ScholarPubMed
Perkins, K. W. (1956). Studies on the morphology and biology of Acetodextra amiuri (Stafford) (Trematoda: Heterophyidae). Am. Midl. Nat. 55, 139.CrossRefGoogle Scholar
Rees, G. (1939). Studies on the germ-cell cycle of the digenetic trematode Parorchis acanthus Nicoll. Part 1. Anatomy of the genitalia and gametogenesis in the adult. Parasitology, 31, 417.CrossRefGoogle Scholar
Retzius, G. (1909). Die Spermien der Cestoden und der Trematoden. B. Die Spermien der Trematoden. Biol. Untersuch. 14, 72.Google Scholar
Ris, H. (1962). Interpretation of ultrastructure in the cell nucleus. Symp. Int. Soc. Cell Biol. 1, 69.Google Scholar
Sanderson, A. R. (1959). Maturation and fertilization in two digenetic trematodes, Haplometra cylindracea (Zeder, 1800) and Fasciola hepatica (L.). Proc. roy. Soc. Edinb. B, 67, 83.Google Scholar
Shapiro, J. E., Hershenov, B. R. & Tulloch, G. S. (1961). The fine structure of Haematoloechus spermatozoon tail. J. biophys. biochem. Cytol. 9, 211.CrossRefGoogle Scholar
Van Der Woude, A. (1954). Germ cell cycle of Megalodiscus temperatus (Stafford, 1905) Harwood, 1932. (Paramphistomidae: Trematoda). Am. Midl. Nat. 51, 172.CrossRefGoogle Scholar
Willmott, S. (1950). Gametogenesis and early development in Gigantocotyle bathycotyle (Fischoeder, 1901) Näsmark, 1937. J. Helminth. 24, 1.CrossRefGoogle Scholar
Willy, C. H. & Godman, G. C. (1951). Gametogenesis, fertilization and cleavage in the trematode, Zygocotyle lunata (Paramphistomidae). J. Parasit. 37, 283.CrossRefGoogle Scholar
Willy, C. H. & Koulish, S. (1950). Development of germ cells in the adult stage of the digenetic trematode, Gorgoderina attenuata Stafford, 1902. J. Parasit. 36, 67.CrossRefGoogle Scholar
Woodhead, A. E. (1931). The germ-cell cycle in the trematode family Bucephalidae. Trans. Am. micr. Soc. 50, 169.CrossRefGoogle Scholar
Yosufzai, H. K. (1952). Cytological studies on the spermatogenesis of Fasciola hepatica L. Cellule, 55, 5.Google ScholarPubMed
Yosufzai, H. K. (1953). Fertilization in Fasciola hepatica L. Cellule, 55, 178.Google ScholarPubMed