Hostname: page-component-669899f699-tpknm Total loading time: 0 Render date: 2025-04-27T05:03:43.144Z Has data issue: false hasContentIssue false
  • English
  • Français

Structure of the cephalic end of two little-known oxyuroid genera, Travnema Pereira, 1938 and Cosmoxynemoides Travassos, 1949, parasites of fishes, as revealed by SEM

Published online by Cambridge University Press:  05 June 2009

F. Moravec ,
A. Kohn  and
B.M.M. Fernandes
F. Moravec
Affiliation:
Institute of Parasitology, Academy of Sciences of the Czech Republic, Branišovská 31, 37005 Ceské Budějovice, Czech Republic
A. Kohn
Affiliation:
Instituto Oswaldo Cruz and CNPq, C.P. 926, Rio de Janeiro, RJ, 20001, Brazil
B.M.M. Fernandes
Affiliation:
Instituto Oswaldo Cruz and CNPq, C.P. 926, Rio de Janeiro, RJ, 20001, Brazil
Get access Rights & Permissions [Opens in a new window]

Abstract

The cephalic end of the type species of pharyngodonid genera Travnema and Cosmoxynemoides, T. travnema Pereira, 1938 and C. aguirrei Travassos, 1949, parasites of Brazilian freshwater fishes, was studied by scanning electron microscopy. The mouth aperture of Travnema was found to be circular, surrounded by four cephalic papillae and two lateral amphids and the cuticle of the cephalic end had a conspicuous dense sculpture. On the other hand, the mouth aperture of Cosmoxynemoides was triangular, surrounded by three lip-like elevations covering the whole surface of the relatively flat cephalic extremity, each with two inner lobes separated one from another by a short groove; the lip-like elevations bore four medium-sized, kidney-shaped cephalic papillae and two minute amphids (two papillae on the dorsal elevation and one papilla and one amphid on each of two ventrolateral elevations); the cuticle of the cephalic end was smooth. Both species were noted for the absence of oral lamellae and the presence of lateral alae. Both genera are listed in the family Pharyngodonidae but Travnema (and also Hakynema), due to its morphological peculiarities, is considered to represent a distinct subfamily Travnematinae within the Pharyngodonidae. The finding of both T. travnema and C. aguirrei in the characid fish Astyanax bimaculatus lacustris represents new host records.

Type
Research Papers
Information
Journal of Helminthology , Volume 68 , Issue 4 , December 1994 , pp. 319 - 322
Copyright
Copyright © Cambridge University Press 1994

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

Kohn, A. & Fernandes, B.M.M. (1987) Estudo comparative dos helmintos parasites de peixes do Rio Mogi Guassu, coletados nas excursões realizadas entre 1927 e 1985. Memórias do Institute Oswaldo Cruz 82, 483–500.CrossRefGoogle Scholar
Kohn, A., Fernandes, B.M.M., Macedo, B. & Abramson, B. (1985) Helminth parasites of freshwater fishes from Pirassununga, SP, Brazil. Memórias do Institute Oswaldo Cruz 80, 327–336.CrossRefGoogle Scholar
Moravec, F. (1994) Structure of the cephalic end in the genus Cithariniella Khalil, 1964 (Nematoda: Pharyngodonidae) as revealed by SEM with a key to pharyngodonid genera from fishes. Systematic Parasitology 27, 133–137.CrossRefGoogle Scholar
Moravec, F., Kohn, A. & Fernandes, B.M.M. (1992a) Three new species of oxyuroid nematodes, including two new genera, from freshwater catfishes in Brazil. Systematic Parasitology 21, 189–201.CrossRefGoogle Scholar
Moravec, F., Kohn, A. & Fernandes, B.M.M. (1992b) Nematode parasites of fishes of the Paraná River, Brazil. Part 1. Trichuroidea, Oxyuroidea and Cosmocercoidea. Folia Parasitologica 39, 327–353.Google Scholar
Moravec, F. & Sey, O. (1988) Nematodes of freshwater fishes from North Vietnam. Part 3. Cosmocercoidea, Seuratoidea, Atractoidea, Heterakoidea and Ascaridoidea. Acta Societatis Zoologicae Bohemoslovacae 52, 250–265.Google Scholar
Pereira, C. (1938) Travnema travnema n. gen. n. sp. (Nematoda: Oxyuridae) parasito de Curimatus elegans (Pisces: Characinidae) no nordeste brasileiro. Livro Jubilar do Dr. Lauro Travassos, pp. 381–383.Google Scholar
Petter, A.-J. & Quentin, J.-C. (1976) Keys to genera of the Oxyuroidea. CIH keys to the nematode parasites of vertebrates. No. 4, 30 pp. Farnham Royal, Commonwealth Agricultural Bureaux.Google Scholar
Skryabin, K.I., Shikhobalova, N.P. & Lagodovskaya, E.A. (1961) Oxyurata of animals and man. Part 2. Osnovy nematodologii 10. 499 pp. Moscow, Publishing House of the USSR Academy of Sciences. (In Russian).Google Scholar
Skryabin, K.I., Shikhobalova, N.P. & Lagodovskaya, E.A. (1964) Oxyurata of animals and man and the diseases caused by them. Part 3. Osnovy nematodologii 13. 468 pp. Moscow,Nauka. (in Russian).Google Scholar
Travassos, L. (1949) Contribuição ao conhecimento da fauna helmintológica dos peixes d'agua doce do Brasil. IV. Dois novos gêneros de Cosmocercidae (Nematoda) e uma nota de nomenclature helmintológica. Memórias do Institute Oswaldo Cruz 46, 633–637.CrossRefGoogle Scholar
Vicente, J.J., Rodrigues, H.O. & Gomes, D.C. (1985) Nematóides do Brasil. la parte: Nematóideos de peixes. Atas do Sociedade de Biologia do Rio de Janeiro 25, 1–79.Google Scholar
Yamaguti, S. (1961) The nematodes of vertebrates, Pts. I,2. Systema Helminthum III. 1261 pp. New York, London., Interscience Publishers.Google Scholar