Abstract
Light and scanning electron microscopical examinations of nematode samples collected from the stomachs and intestines of catfishes Trichomycterus spp. (Trichomycteridae, Siluriformes) from three streams in Colombia revealed the presence of two species, Dentinema trichomycteri n. g., n. sp. (Cosmocercidae) (type-host Trichomycterus sp.) and Procamallanus (Spirocamallanus) chimusensis Freitas & Ibáñez, 1968 (Camallanidae). The new, monotypic genus Dentinema is characterised mainly by the presence of a triangular mouth surrounded by three poorly developed lips, four submedian cephalic papillae, three conical teeth in the well-developed buccal cavity, an elongate oesophageal isthmus which is clearly separated from the corpus, precloacal oblique muscle bands, and by the absence of a ventral sucker. P. chimusensis, recorded from Colombia for the first time, is redescribed from specimens collected from Trichomycterus chapmani (Eigenmann) (a new host record) and Trichomycterus sp.; new observations show that this species belongs to a small group of Procamallanus spp. exhibiting a distinct sexual diversity in the structure of the buccal capsule. P. pexatus Pinto, Fábio, Noronha & Rolas, 1976 is synonymised with P. chimusensis.
Similar content being viewed by others
References
Chabaud, A.G. (1978) Keys to genera of the superfamilies Cosmo-cercoidea, Seuratoidea, Heterakoidea and Subuluroidea. In: Anderson, R.C., Chabaud, A.G. & Willmott, S. (Eds) CIH keys to the nematode parasites of vertebrates. No. 6. Farnham Royal, Bucks: Commonwealth Agricultural Bureaux, 71 pp.
Freitas, J.F.T. & Ibáñez, H.N. (1968) Fauna helmintológica del PerÚ: nueva especie del género Spirocamallanus Olsen, 1952 (Nem-atoda, Camallanoidea). Boletin Chileno de Parasitología, 23, 146–148.
Froese, R. & Pauly, D. (Eds) (2003) FishBase. World Wide Web electronic publication. www.fishbase.org, 23 January, 2004.
Mateo, E.C. (1970) Nematodes de peces del Lago Titicaca. I. Per-unema escomeli, nuevo género y nueva especie de la sub-familia Cosmocercinae Railliet, 1916. Revista del Programa Académico de Oceanografía y Pesquería de la Universidad Nacional Fed-erico Villareal, Lima, 1, 50–56.
Moravec, F. (1998) Nematodes of freshwater fishes of the Neotrop-ical Region. Prague: Academia, 464 pp.
Moravec, F., Salgado-Maldonado, G. & Caspeta-Mandujano, J. (2000) Three new Procamallanus (Spirocamallanus) species from freshwater fishes in Mexico. Journal of Parasitology, 86, 119–127.
Moravec, F. & Sey, O. (1990) Some nematode parasites of frogs from Papua New Guinea and Australia. Acta Societatis Zoolo-gicae Bohemoslovacae, 54, 268–286.
Pinto, R., Fábio, S.P., Noronha, D. & Rolas, F.J.T. (1976) Novas considerações morfológicas e sistemáticas sobre os Procamal-lanus brasileiros (Nematoda, Camallanoidea). Memórias do Instituto Oswaldo Cruz, 74, 77–84+ pl. I-V.
Tantaleán, V.M., Franco, A.H. & Huayta, E.H. (1985) Helmintos parásitos de peces de agua dulce del PerÚ. Puno, Peru: Instituto de Investigaciones para el Desarrollo Social del Altiplano, 44 pp.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Moravec, F., Chara, J. & Shinn, A.P. Two nematodes, Dentinema trichomycteri n. g., n. sp. (Cosmocercidae) and Procamallanus chimusensis Freitas & Ibáñez, 1968 (Camallanidae), from catfishes Trichomycterus spp. (Pisces) in Colombia. Syst Parasitol 59, 189–197 (2004). https://doi.org/10.1023/B:SYPA.0000048098.80098.26
Issue Date:
DOI: https://doi.org/10.1023/B:SYPA.0000048098.80098.26