Rhinoxenus (Dactylogyridae) parasitizing piranhas (Serrasalmidae) at its southernmost limit of distribution (Paraná River, Argentina), with the description of two new species
Título del documento: Rhinoxenus (Dactylogyridae) parasitizing piranhas (Serrasalmidae) at its southernmost limit of distribution (Paraná River, Argentina), with the description of two new species
Revista: Anais da Academia Brasileira de Ciencias
Base de datos: PERIÓDICA
Número de sistema: 000436312
ISSN: 0001-3765
Autores: 1
2
1
3
1
1
Instituciones: 1Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales, Mar del Plata, Buenos Aires. Argentina
2Universidad Nacional de La Plata, Instituto Multidisciplinario de Biología Celular, La Plata, Buenos Aires. Argentina
3Instituto Nacional de Limnología, Laboratorio de Ictiología, Santa Fe. Argentina
Año:
Volumen: 91
Número: 4
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico, descriptivo
Resumen en inglés Three piranha species, Serrasalmus maculatus, S. marginatus and Pygocentrus nattereri, living sympatrically in the lower Paraná River (Argentina) were examined searching for nasal monogeneans to know its diversity and distribution. Four species of monogeneans belonging to Rhinoxenus were found parasitizing the nasal cavities. Two new species are described, and new morphological data of 2 previously described species is provided. Rhinoxenus argentinensis n. sp. is characterized by having the male copulatory organ (MCO) as a coiled tube with a reel shaped-base; an elongated accessory piece articulated to base of MCO; a sinistral vagina with a sclerotized vestibule, and a sclerotized cap of the ventral anchor laterally modified forming a triangular expansion. Rhinoxenus paranaensis n. sp. is characterized by having a MCO as a coiled tube with a reel-shaped base; an accessory piece with an elongate proximal portion, a dilated distal portion with digitiform projections articulated to base of MCO; a sinistral vagina with 5-6 cuticular spine-shaped processes, and a sclerotized cap of the ventral anchor modified laterally forming a bilobate expansion. Additionally, multivariate discriminant analyses showed significant morphometric differences in the ventral anchors among Rhinoxenus species parasitizing ‘piranhas ’
Disciplinas: Biología
Palabras clave: Taxonomía y sistemática,
Helmintos,
Nuevas especies,
Parásitos de peces,
Descripción taxonómica,
Pirañas,
Rhinoxenus argentinensis,
Rhinoxenus paranaensis,
Dactylogyridae,
Argentina
Keyword: Taxonomy and systematics,
Helminths,
New species,
Fish parasites,
Taxonomic description,
Piranhas,
Rhinoxenus argentinensis,
Rhinoxenus paranaensis,
Dactylogyridae,
Argentina
Texto completo: Texto completo (Ver HTML) Texto completo (Ver PDF)