Folia Parasitologica, vol. 56 (2009), issue 3

Folia Parasitologica 56[3] 194-198 (2009) | 10.14411/fp.2009.024

Redescription of Gessyella latridopsis (Johnston et Mawson, 1945) (Nematoda: Capillariidae), a parasite of latrid fishes from the Southern Hemisphere

María Alejandra Rossin, Juan Tomás Timi
Laboratorio de Parasitología, Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Funes 3350, (7600) Mar del Plata, Argentina

The type species of the monotypic genus Gessyella Freitas, 1959, G. latridopsis (Johnston et Mawson, 1945) (Nematoda: Capillariidae), is redescribed from specimens found in the rectum of the marine fish Nemadactylus bergi Norman (Latridae, Perciformes) (a new host record) from the southwestern Atlantic Ocean off Mar del Plata, Argentina. In addition to the morphological and biometrical variability of this species, some new, previously unreported taxonomic features, such as the extent of the spination of the spicular sheath, the morphology of the spicular canal, the distal end of the spicule, the ejaculatory duct, the cloaca, the seminal vesicle, vas deferens and the testis, are described for the first time. Despite the long geographical distance of G. latridopsis records (Australia vs. Argentina), the morphology of the newly collected specimens is in agreement with the existing descriptions of G. latridopsis and both host species are closely related. Therefore, the Argentine specimens are considered to belong to this species.

Keywords: parasitic nematodes, marine fish, Argentine Sea, Latridae, Gessyella

Received: June 2, 2009; Accepted: July 9, 2009; Published: September 1, 2009


References

  1. Burridge C.P. 1999: Molecular phylogeny of Nemadactylus and Acantholatris (Perciformes: Cirrhitoidea: Cheilodactylidae), with implications for taxonomy and biogeography. Mol. Phylogenet. Evol. 13: 93-109 Go to original source... Go to PubMed...
  2. Burridge C.P., Smolenski A.J. 2004: Molecular phylogeny of the Cheilodactylidae and Latridae (Perciformes: Cirrhitoidea) with notes on taxonomy and biogeography. Mol. Phylogenet. Evol. 30: 118-127 Go to original source... Go to PubMed...
  3. Cantatore D., Rossin M.A., Lanfranchi A.L., Timi J.T. 2009: A new species of Capillostrongyloides (Nematoda: Capillariidae) parasitizing Nemadactylus bergi (Perciformes: Cheilodactylidae) from the Argentine Sea. J. Parasitol. 95: 388-391 Go to original source... Go to PubMed...
  4. Freitas J.F.T. 1959: Esboco de novo arranjo sistematico para os Nematodos Capilariineos (Trichuroidea). Atas Soc. Biol. Rio J. 3: 4-6
  5. Greenwood P.H. 1995: A revised familial classification for certain cirrhitoid genera (Teleostei, Percoidei, Cirrhitoidea), with comments on the group's monophyly and taxonomic ranking. Bull. Nat. Hist. Mus. Lond. 61: 1-10
  6. Johnston T.H., Mawson P.M. 1945: Capillariid nematodes from South Australian fish and birds. Trans. R. Soc. S. Aust. 69: 243- 248
  7. Moravec F. 1987: Revision of capillariid nematodes (subfamily Capillariinae) parasitic in fishes. Studie CSAV No. 3, Academia, Praha, 141 pp Go to PubMed...
  8. Moravec F. 2001: Trichinelloid Nematodes Parasitic in Coldblooded Vertebrates. Academia, Prague, 429 pp
  9. Rossin M.A., Timi J.T. 2009: A new species of Paracapillaroides (Nematoda: Capillariidae) parasitizing Nemadactylus bergi (Perciformes: Latridae) from the Argentine Sea. Folia Parasitol. 56: 37-40 Go to original source... Go to PubMed...
  10. Timi J.T., Rossin M.A., Lanfranchi A.L. 2006: A new species of Capillaria (Nematoda: Capillariidae) parasitizing Conger orbignianus (Pisces: Congridae) from Argentina. J. Parasitol. 92: 628-630 Go to original source... Go to PubMed...
  11. Timi J.T., Rossin M.A., Lanfranchi A.L., Etchegoin J.A. 2007: A new species of Paracapillaria (Nematoda: Capillariidae) parasitizing the Brazilian sandperch Pinguipes brasilianus (Pisces: Pinguipedidae) from Argentina. J. Parasitol. 93: 922-924 Go to original source... Go to PubMed...