Systematic Parasitology

, Volume 24, Issue 3, pp 191–199 | Cite as

Life-history studies of heterophyid trematodes in the Neotropical Region: Ascocotyle (Phagicola) diminuta (Stunkard & Haviland, 1924) and A. (P.) angrense Travassos, 1916

  • Margarita Ostrowski de Núñez


The life-cycle of Ascocotyle (Phagicola) diminuta (Stunkard & Haviland, 1924) was reproduced experimentally, starting from cercariae from naturally infected Littoridina castellanosae and L. parchappei (Hydrobiidae) collected from artificial ponds in the Zoological Garden in Buenos Aires and from Los Ranchos stream, Buenos Aires Province, respectively. Metacercariae were found encysted in the gills of experimentally exposed Cnesterodon decemmaculatus (Poecilidae) and of other naturally infected freshwater fishes. Adults were obtained experimentally in chicks and mice and from a naturally infected egret, Egretta thula. A. (P.) angrense Travassos, 1916 was found parasitising the egret Ixobrychus involucris; it is considered a valid species and the morphological differences between it and A. (P.) diminuta were established. The “Phagicola-form” of the cercaria in the present life-cycle is also known in the genus Pygidiopsis.


Ventral Sucker Oral Sucker Seminal Receptacle Anterior Extremity Vitelline Follicle 
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  1. Font, W.F., Overstreet, R.M. & Heard, R.W. (1984) Taxonomy and biology of Phagicola nana (Digenea, Heterophyidae). Transactions of the American Microscopical Society, 103, 408–422.CrossRefGoogle Scholar
  2. Køie, M. (1990) The life cycle of Pygidiopsis ardeae Køie, 1990 (Digenea, Heterophyidae). Journal of Parasitology, 76, 537–541.PubMedCrossRefGoogle Scholar
  3. Leigh, W.H. (1974) Life history of Ascocotyle mcintoshi Price, 1936 (Trematoda, Heterophyidae). Journal of Parasitology, 60, 768–772.PubMedCrossRefGoogle Scholar
  4. O'Hara, M.G. (1961) The life cycle of Parascocotyle diminuta. Masters Thesis. University of Miami. Coral Gables Florida.[Not seen]Google Scholar
  5. Ostrowski de Núñez, M. (1974) Estudio sobre estados larvales de trematodes digeneos de peces Cyprinodontiformes. Physis, Buenos Aires, Seccion B, 33 (84), 45–61.Google Scholar
  6. Ostrowski de Núñez, M. (1976) Fauna de Agua Dulce en la Republica Argentina. IV. Las cercarias de Ascocotyle (A.) tenuicollis Price, 1935 y de Pygidiopsis pindoramensis Travassos, 1929 (Trematoda, Heterophyidae). Physis, Buenos Aires, Seccion B, 35 (90), 51–57.Google Scholar
  7. Schroeder, R.E. & Leigh, W.H. (1965) The life history of Ascocotyle pachycystis n.sp., a trematode (Digenea, Heterophyidae) from the racoon in south Florida. Journal of Parasitology, 51, 594–599.PubMedCrossRefGoogle Scholar
  8. Scott, L. (1964) Studies on some parasites associated with salt marshes of southeastern New Hampshire. Ph.D Thesis University of New Hampshire, Department of ZoologyGoogle Scholar
  9. Snyder, D.E., Hamir, A.N., Haulon, C.A. & Rupprecht, C.E. (1989) Phagicola angrense (Digenea, Heterophyidae) as a cause of enteritis in a racoon (Procyon lotor). Journal of Wildlife Diseases, 25, 273–275.PubMedGoogle Scholar
  10. Sogandares-Bernal, F. & Lumsden, R.D. (1963) The generic status of the heterophyid trematodes of the Ascocotyle complex, including notes on the systematics and biology of Ascocotyle angrense Travassos, 1916. Journal of Parasitology, 49, 264–274.CrossRefGoogle Scholar
  11. Stein, P.C. (1968) Studies on the life history and biology of the trematode genus Ascocotyle. PhD Thesis. University of Miami, Department of Zoology.Google Scholar
  12. Stunkard, H.W. & Uzman, R.J. (1955) The killifish, Fundulus heteroclitus, second intermediate host of the trematode, Ascocotyle (Phagicola) diminuta. Biological Bulletin. Marine Biological Laboratory Woods Hole, 109, 475–483Google Scholar
  13. Travassos, L. (1930) Revisao do genero Ascocotyle (Looss, 1899) (Trematoda, Heterophyidae). Memorias Instituto Oswaldo Cruz, 23, 61–97.Google Scholar
  14. Travassos, L. (1931) Contribuicoes ao conhecimento das Heterophyidae (Trematoda). Memorias Instituto Oswaldo Cruz, 25, 47–49.Google Scholar
  15. Witenberg, G. (1929) Studies on the trematode family Heterophyidae. Annals of Tropical Medicine and Parasitology, 23, 131–239.Google Scholar

Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • Margarita Ostrowski de Núñez
    • 1
  1. 1.Facultad de Ciencias Exactas y Naturales, Departamento de Ciencias BiológicasCiudad UniversitariaNúñezArgentina

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