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A new genus and species of the Monticelliinae (Eucestoda: Proteocephalidea), a parasite of Pseudoplatystoma fasciatum (Pisces: Siluriformes) from the Paraná River basin (Argentina), with comments on microtriches of proteocephalideans

2013; Institute of Parasitology of the Czech Academy of Sciences; Volume: 60; Issue: 3 Linguagem: Inglês

10.14411/fp.2013.028

1803-6465

Nathalia J. Arredondo, Alain de Chambrier, Alicia A. Gil de Pertierra,

Fish biology, ecology, and behavior

The Pimelodidae, which includes large catfishes (Froese and Pauly 2012), is the most diversified family of siluriforms inhabiting the great river basins of south America.Large catfishes of the genera Brachyplatystoma Bleeker, Pseudoplatystoma Bleeker and Zungaro Bleeker are mainly parasitized by a rich fauna of proteocephalidean cestodes (de chambrier and Vaucher 1999(de chambrier and Vaucher , rego et al. 1999(de chambrier and Vaucher , carfora et al. 2003(de chambrier and Vaucher , de chambrier et al. 2006a)).During a collecting trip in the Paraná river basin in Argentina, specimens of an undescribed proteocephalidean tapeworm were collected from the intestines of the barred sorubim, Pseudoplatystoma fasciatum (linnaeus), locally known as 'surubí atigrado'.these tapeworms were assigned to the Monticelliinae Mola, 1929, but could not be allocated to any of the known genera.therefore, a new genus is proposed to accommodate the new species described herein, which is the eighth proteocephalidean species found in P. fasciatum. Materials and Methodsten specimens of Pseudoplatystoma fasciatum (siluriformes: Pimelodidae) were caught during December 2001December , 2003December and 2010 in the colastiné river (tributary of the Paraná river), santa Fe Province, Argentina.All tapeworms found in the intestines were removed, fixed in hot 4% formaldehyde solution and subsequently stored in 70% ethanol.Additionally, small pieces of strobila from the new worms were placed in 99% pure ethanol for future DNA analysis and deposited at the Natural History Museum, geneva, switzerland (MHNg-PlAt 79184) and at the laboratory of Helminthology, Facultad de ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina.Entire tapeworms were stained with langeron's alcoholic hydrochloric carmine (langeron 1949), differentiated in acid ethanol, dehydrated through a graded ethanol series, cleared in beechwood creosote and mounted in canada balsam.Details of the internal anatomy were determined from thick, hand-cut, transverse serial sections of proglottides stained with langeron's alcoholic hydrochloric carmine.intrauterine eggs were examined in distilled water for drawing.type material is deposited in the Parasitological collection of the Museo Argentino de ciencias Naturales 'Bernardino rivadavia', Buenos Aires, Argentina (MAcN-Pa); the Natural History Museum, geneva, switzerland (MHNg-PlAt); and the institute of Parasitology, České Budějovice, Czech Republic (IPCAS).three entire specimens of the new species were prepared for scanning electron microscopy (sEM) as follows: worms were a new genus and species of the Monticelliinae (eucestoda: Proteocephalidea), a parasite of Pseudoplatystoma fasciatum (Pisces: siluriformes) from the Paraná river basin (argentina), with comments on microtriches of proteocephalideans