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Systematic Parasitology

, Volume 69, Issue 1, pp 23–31 | Cite as

The development of Gymnophallus australis Szidat, 1962 (Digenea: Gymnophallidae) from the Patagonian coast (Argentina) from metacercaria to adult, with an amended diagnosis of Gymnophallus Odhner, 1905

  • Florencia CremonteEmail author
  • Nuria Vázquez
  • Cristián Ituarte
Article

Abstract

Parvatrema australis (Szidat, 1962) Szidat, 1965 was described based on larval stages found in specimens of the mussel Mytilus edulis from the Buenos Aires Province, Argentina. Although Szidat later examined hundreds of mussels, this parasite has never been found again until now. In the present study, larval stages, including germinal sacs, found in mytilids from the Patagonian coast were identified as P. australis. Metacercariae were incubated in vitro at 39°C in physiological solution for 18–20 hours, by which time 80% of the specimens had eggs. P. australis is redescribed, on the basis of infective metacercariae and adults obtained in the laboratory, and is reassigned to Gymnophallus Odhner, 1900, the genus in which it was originally described. The generic diagnosis of Gymnophallus is here amended to include as diagnostic characters the presence or absence of the lateral lips, the form and position of the vitellarium (compact or follicular) and the presence of a pars prostatica (i.e. prostatic cells open into proximal part of the ejaculatory duct). The validity of some characters (i.e. the presence of lateral lips of the oral sucker, the form of the vitellarium and excretory vesicle, the extent of the uterus) as diagnostic at the generic level within the family Gymnophallidae is discussed. It is proposed that the least unambiguous characters that can be used to distinguish gymnophallid genera include the position of the ovary, the presence of a ventral pit and a pars prostatica, and caecal diverticula.

Keywords

Seminal Vesicle Ventral Sucker Oral Sucker Genital Pore Ejaculatory Duct 
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.

Notes

Acknowledgements

The authors express their gratitude to Javier Klaich, Graciela Escudero and other people from the Centro Nacional Patagónico, who collaborate in sampling activities, and Patricia Sarmiento (from the Museo de La Plata SEM unit) for her advice and technical assistance in the preparation of metacercariae for SEM. Special thanks are owed to Pierre Bartoli (Centre d’Océanologie de Marseille) for a critical revision of the manuscript and for his marvellous work on gymnophallids, which were a guide for this work. The authors also thank both anonymous reviewers for their suggestions that improve the manuscript. The present study was funded by the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) (projects Nos PIP 5990 and 5653) and the Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT) (Project Nos. PICT 01–11902 BID 1728/OC-AR). F.C. and C.I. are members of CONICET.

References

  1. Bartoli, P. (1963). Note préliminaire sur l’anatomie et la biologie de Parvatrema timondavidi n. sp. (Trematoda, Digenea). Comptes Rendus de l’Académie des Sciences, Paris, 273, 518–520.Google Scholar
  2. Bartoli, P. (1974). Recherches sur les Gymnophallidae F. N. Morozov, 1955 (Digenea) parasites d’oiseaux des côtes de Camargue: systématique, biologie et ecologie. Thèse, Université d’Aix-Marseille, 338 pp.Google Scholar
  3. Ching, H. L. (1982). Description of germinal sacs of gymnophallid trematode, Cercaria margaritensis sp. n., in the extrapallial fluid of subtidal snails (Margarites spp.) in British Columbia. Canadian Journal of Zoology, 60, 516–520.Google Scholar
  4. Ching, H. L. (1995). Evaluation of characters of the family Gymnophallidae Morozov, 1955. Canadian Journal of Fisheries and Aquatic Sciences, 52 (Suppl. 1), 78–83.Google Scholar
  5. Cremonte, F. (1999). Estudio parasitológico de bivalvos que habitan ambientes marinos y mixohalinos en Argentina. Tesis doctoral: Universidad Nacional de La Plata, 196 pp.Google Scholar
  6. Cremonte, F. (2001). Bartolius pierrei n. g., n. sp. (Digenea: Gymnophallidae) from the Península Valdés, Argentina. Systematic Parasitology, 49, 139–147.PubMedCrossRefGoogle Scholar
  7. Cremonte, F. (2004). Life cycle and geographic distribution of the gymnophallid Bartolius pierrei (Digenea) on the Patagonian coast, Argentina. Journal of Natural History, 38, 1591–1604.CrossRefGoogle Scholar
  8. Franjola, R., & Gallardo, C. (1991). Estados larvales de Digenea en Kingiella chilenica (Mollusca—Bivalvia, Cyamiidae). Boletín Chileno de Parasitología, 64, 34–35.Google Scholar
  9. Galaktionov, K. B. (1996). The experimental study of the unusual life cycle of Parvatrema sp. (Trematoda: Gymnophallidae). Parazitologiya, 30, 487–494, (In Russian).Google Scholar
  10. Galaktionov, K. V., Irwin, S. W., & Saville, D. H. (2006). One of the most complex life-cycles among trematodes: A description of Parvatrema margaritense (Ching, 1982) n. comb. (Gymnophallidae) possessing parthenogenetic metacercariae. Parasitology, 132, 733–746.PubMedCrossRefGoogle Scholar
  11. James, B. L. (1960). A new cercaria of the subfamily Gymnophallinae (Trematoda: Digenea) developing in a unique “parthenita” in Littorina saxatilis (Olivi). Nature, 185, 181–182.CrossRefGoogle Scholar
  12. James, B. L. (1964). The life cycle of Parvatrema homoeotecnum sp. nov. (Trematoda: Digenea) and a review of the family Gymnophallidae Morozov, 1955. Parasitology, 54, 1–41.CrossRefGoogle Scholar
  13. Martorelli, S. R., & Morriconi, E. (1998). A new gymnophallid metacercaria (Digenea) in Nacella (P.) magellanica and N. (P.) deaurata (Mollusca, Patellidae) from the Beagle Channel, Tierra del Fuego, Argentina. Acta Parasitologica, 43, 20–25.Google Scholar
  14. Pekkarinen, M. (1984). Anatomy, histology and maturing of the metacercaria of Lacunovermis macomae (Trematoda: Gymnophallidae) from brackish-water Macoma balthica (Southwestern Finland, Baltic Sea). Annales Zoologici Fennici, 21, 481–498.Google Scholar
  15. Scholz, T. (2002). Family Gymnophallidae Odhner, 1905. In Gibson, D. I., Jones, A., & Bray, R. A. (Eds), Keys to the Trematoda (Vol. 1, pp. 245–251). Wallingford: CAB International.Google Scholar
  16. Szidat, L. (1962). Über eine ungewohnliche Form parthenogenetischer Vermehrung bei Metacercarien einer Gymnophallus-art aus Mytilus platensis, Gymnophallus australis n. sp. des Sudatlantik. Zeitschrift für Parasitenkunde, 22, 196–213.CrossRefGoogle Scholar
  17. Szidat, L. (1965). Los parásitos de los mitílidos y los daños por ellos causados II. Los parásitos de Mytilus edulis platensis (Orb.) (mejillón del plata). Comunicaciones del Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, 1, 1–16.Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Florencia Cremonte
    • 1
    Email author
  • Nuria Vázquez
    • 1
  • Cristián Ituarte
    • 2
  1. 1.Centro Nacional Patagónico (CONICET)Puerto MadrynArgentina
  2. 2.Museo Argentino de Ciencias Naturales (CONICET)Buenos AiresArgentina

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