scholarly journals A new species of Pseudocrepidobothrium (Cestoda: Proteocephalidea) from Pseudoplatystoma reticulatum (Pisces: Siluriformes) in the Parana River basin (Argentina)

2014 ◽  
Vol 61 (5) ◽  
pp. 462-472 ◽  
Author(s):  
Nathalia J. Arredondo ◽  
Alicia A. Gil de Pertierra ◽  
Alain de Chambrier
Keyword(s):  
New Species ◽  
River Basin ◽  
Paraná River ◽  
Parana River ◽  
A New Species ◽  
Paraná River Basin

Origin of species diversity in the catfish genus Hypostomus (Siluriformes: Loricariidae) inhabiting the Paraná river basin, with the description of a new species

Zootaxa ◽  
2012 ◽  
Vol 3453 (1) ◽  
pp. 69 ◽  
Author(s):  
YAMILA P. CARDOSO ◽  
ADRIANA ALMIRÓN ◽  
JORGE CASCIOTTA ◽  
DANILO AICHINO ◽  
MARTA S. LIZARRALDE ◽  
...  
Keyword(s):  
New Species ◽  
Species Diversity ◽  
River Basin ◽  
Mitochondrial Control Region ◽  
Paraná River ◽  
Sea Level Changes ◽  
Parana River ◽  
D Loop ◽  
A New Species ◽  
Paraná River Basin

Within the Loricariidae, the genus Hypostomus is one of the most diversified freshwater catfish groups. Using new se-quence data from the mitochondrial Control Region (D-loop) we examined the phylogeny of this genus. Our phylogeneticanalyses suggest that, in the Paraná river basin, species diversity in the genus Hypostomus has been shaped by two proc-esses: 1) by inter-basin diversification, generating groups of species that inhabit different basins, as a result of dispersalevents; and 2) via intra-basin speciation as a result of basin fragmentation due to past marine transgressions, which pro-duced groups of species within a basin. Using the D-loop as a molecular clock, each event of diversification was datedand linked with documented hydrological events or sea level changes. We also assessed the possible dispersal routes be-tween the Paraná and Uruguay rivers, in addition to the obvious dispersal route via the Río de la Plata estuary. Finally, wedescribe a new species of Hypostomus inhabiting Middle Paraná river, Hypostomus arecuta n. sp. This species can be sep-arated from all other Hypostomus by having light roundish dots on a darker background and by number of premaxillary/ dentary teeth.

scholarly journals A new species of the catfish genus Cambeva from the Paranapanema river drainage, southeastern Brazil (Siluriformes: Trichomycteridae)

2020 ◽  
Vol 33 (1) ◽  
Author(s):  
Axel M. Katz ◽  
Wilson J.E.M. Costa
Keyword(s):  
New Species ◽  
River Basin ◽  
Paraná River ◽  
Valid Species ◽  
Colour Pattern ◽  
Southeastern Brazil ◽  
River Drainage ◽  
Parana River ◽  
A New Species ◽  
Paraná River Basin

The recently described catfish trichomycterid genus Cambeva comprises about 25 valid species, occurring mostly in river basins of south-eastern and southern Brazil. Fifteen species are endemic to the Paraná river basin, of which three are endemic to the Paranapanema river drainage. Herein we describe a fourth new species, Cambeva guareiensis n. sp., known only from the Guareí river. Cambeva guareiensis is similar to C. brachykechenos, C. cubataonis, C. diabola, C. davisi, C. diatropoporos, C. pascuali, C. poikilos and C. stawiarski by having a colour pattern consisting of dark brown spots scattered on the flank and can be differentiated by an exclusive combination of characters, including: the shape of the autopalatine; number of branchiostegal, anal-fin, dorsal-fin, dorsal and ventral caudal procurrent, and pectoral-fin rays; number of interopercular and opercular odontodes; number of vertebrae; and, insertion of anal fin, pelvic fin and urogenital papillae. This study indicates the potential for discovering a greater still unknown trichomycterid species diversity in the Paraná river basin.

scholarly journals Heptapterus mbya (Siluriformes: Heptapteridae), a new species of catfish from the Paraná river basin, in Argentina

2011 ◽  
Vol 118 ◽  
pp. 319-327 ◽  
Author(s):  
Maria De Las Mercedes Azpelicueta Gaston Uglier ◽  
Juan Marcos Mirande
Keyword(s):  
New Species ◽  
River Basin ◽  
Paraná River ◽  
Parana River ◽  
A New Species ◽  
Paraná River Basin

scholarly journals Hypostomus hermanni redescription and a new species of Hypostomus (Siluriformes: Loricariidae) from Upper Paraná River basin, Brazil

2021 ◽  
Vol 19 (2) ◽  
Author(s):  
Angelica Corrêa Dias ◽  
Cláudio Henrique Zawadzki
Keyword(s):  
New Species ◽  
River Basin ◽  
Paraná River ◽  
Parana River ◽  
Upper Paraná River ◽  
Upper Paraná River Basin ◽  
A New Species ◽  
Paraná River Basin

Abstract A redescription of Hypostomus hermanni is presented herein along with the description of a new species of Hypostomus, which is apparently endemic to the Ivaí River basin, a tributary of the Upper Paraná River basin, Brazil. Hypostomus hermanni is diagnosed from congeners mainly by having: usually large black blotches on body and fins; absence of keels on compound pterotic, on pre-dorsal plates, and on lateral series of bony plates; by having parieto-supraoccipital and predorsal region flat; and by having less than 46 teeth per each premaxilla or dentary ramus. The new species is distinguished from congeners mainly for lacking conspicuous blotches, parieto-supraoccipital non-carinate, and villiform bicuspid teeth.

New species and records of Arrenurus from the Paraná river, Argentina (Acari: Parasitengona: Arrenuridae)

Zootaxa ◽  
2006 ◽  
Vol 1208 (1) ◽  
pp. 25
Author(s):  
ROSSO De FERRADÁS BEATRIZ
Keyword(s):  
New Species ◽  
River Basin ◽  
Geographic Distribution ◽  
Paraná River ◽  
Morphometric Characteristics ◽  
Parana River ◽  
Brazilian Species ◽  
First Time ◽  
Paraná River Basin

Arrenuridae inhabiting the Paraná river basin show great diversity relative to that of this family in Argentina and other Neotropical regions, with 38 species (35 studied by the author). In this new contribution Arrenurus mocovi n.sp. is described and A. (Arrenurus) trichophorus Daday is recorded for the first time. The female of this latter species is redescribed and data for the males are added, as well as the geographic distribution of the species. For Arrenurus imperator imperator Lundblad, a Brazilian species, morphometric characteristics are given. The recently created subgenus A. (Brevicaudaturus) is analyzed, within which the last species plus three other neotropical taxa are placed.

Trinigyrus spp. (Monogenea: Dactylogyridae) from Brazilian catfishes: new species, molecular data and new morphological contributions to the genus

2020 ◽  
Vol 94 ◽  
Author(s):  
L. Franceschini ◽  
A.A. Acosta ◽  
A.C. Zago ◽  
M.I. Müller ◽  
R.J. da Silva
Keyword(s):  
New Species ◽  
River Basin ◽  
Phylogenetic Analyses ◽  
Copulatory Organ ◽  
Molecular Data ◽  
Paraná River ◽  
Parana River ◽  
Upper Paraná River ◽  
Upper Paraná River Basin ◽  
Paraná River Basin

Abstract This study describes two new species, Trinigyrus anthus n. sp. and Trinigyrus carvalhoi n. sp., from gills of Hypostomus spp. from the Upper Paraná River basin, Brazil. Trinigyrus peregrinus is redescribed based on examination of its holotype, paratypes and new material of specimens parasitizing Pterygoplichthys ambrosettii, also from the Upper Paraná River basin, Brazil. New morphological features were included in the diagnosis of the genus, such as the presence of a sclerotized border on the anchor base, and a weakly sclerotized fringe on the base of the male copulatory organ (MCO). Trinigyrus anthus n. sp. differs from other congeners by the shape of the MCO, presenting an enlarged base with sclerotized fringes resembling flower petals. Trinigyrus carvalhoi n. sp. and T. peregrinus are similar but can be differentiated from each other mainly by the sclerotization of the vagina (absent in the new species), and the morphology of the MCO (C-shaped versus one counterclockwise circle, respectively). For the first time, gene sequences of Trinigyrus spp. from Brazil were obtained (partial ribosomal 28S and mitochondrial cytochrome c oxidase I (mtCOI)). The genetic divergences among the new species and T. peregrinus varied from 2 to 3% (6‒18 pb) based on sequences of 28S ribosomal DNA (rDNA), and 6–7% (83‒92 pb) using mtCOI. Phylogenetic analyses based on partial 28S rDNA revealed that Trinigyrus, Heteropriapulus and Unilatus formed a monophyletic and well-supported clade of monogeneans from Neotropical freshwater loricariids, suggesting a closer relationship among these dactylogyrids and their hosts.

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