Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated

Abstract

The book “Peixes da planície de inundação do alto rio Paraná e áreas adjacentes” represents the most cohesive data compilation for the rio Paraná floodplain. However, considering the dynamicity of the taxonomy of freshwater fishes, several new records and taxonomic changes occurred along the past years. Therefore, the results of that publication were revisited, providing an update of the species list, their taxonomic status, records and geographic distribution, and also new keys for genera and species. The species included were those recorded in the rio Paraná basin, from the mouth of the rio Paranapanema to the Itaipu Reservoir, following the general methodology presented in the book. A total of 10 orders, 41 families, 126 genera, and 211 species were registered, with an increase of one order, six families, 14 genera, and 29 species when compared to the book. Additionally, four new genera recently described, five synonymization proposals, 14 new identifications, four new combinations, 12 new species recently described, 34 new records, and nine misidentified species were recorded. These results are associated with the redirection of human and financial resources to that area, which enabled monitoring and intensive exploration of its watercourses; as well as training of taxonomists, and new taxonomic resolutions.

A new species of Piaractus (Characiformes: Serrasalmidae) from the Orinoco Basin with a redescription of Piaractus brachypomus

“…The third species of the genus, P. mesopotamicus , is restricted to Paraná‐Paraguay River basin (Fricke et al, ; Jégu, ; Ota et al ., ). Piaractus mesopotamicus possesses morphological differences that distinguish it from its two congeners, such as tiny scales on the body, reflected in more lateral line scales (107–128 vs .…”

“…The third species of the genus, P. mesopotamicus, is restricted to Paraná-Paraguay River basin (Fricke et al, 2018;Jégu, 2003;Ota et al, 2018). Figure 6).…”

“…We also thank Otto Enrique Castillo G., Donald C. Taphorn, Iván Mojica, F. Lima and M. Andrade for their comments and suggestions. Finally, we are in debt to Mark Sabaj for providing photo in Figure , Nadayca Mateussi for photo in Figure , Bruno Barros and Renata Ota (Ota et al ., ) for photos of P. brachypomus , M. albiscopum and C. macropomum , and P. mesopotamicus , respectively in Figure , and Celsi Señaris and Sergio León for photos of P. orinoquensis and P. brachypomus , respectively, in Figure . We are grateful to SISBIO/Brazil, INCODER/Colombia and INSOPESCA/Venezuela for providing biological sample collection permits.…”

Morphological and molecular identification of Geophagus sveni Lucinda, Lucena & Assis, 2010 (Cichlidae, Cichliformes) from the Paraná river basin, Argentina

“…The finding of Geophagus sveni in the Paraná River in Argentina constitutes the first report of the genus Geophagus sensu stricto from the country; although the presence of the genus in the Paraná river basin has been suggested since 2007, with reports of G. proximus (Graça and Pavanelli 2007, Moretto et al 2008, Gois et al 2015. The first report of G. sveni in the Upper Paraná river basin is an updated checklist of fishes from the Upper Paraná floodplain by Ota et al (2018). These authors reassigned specimens previously reported as Geophagus cf.…”

“…Although the Amazon native Geophagus proximus (Castelnau, 1855) has been recorded from reservoirs of the Upper Paraná river basin in Brazil since the early 2000s (Graça and Pavanelli 2007, Moretto et al 2008, Gois et al 2015, there were no records of the genus from the Argentine stretch until now (Mirande and Koerber 2015). In a recently published update to Graça and Pavanelli (2007), Ota et al (2018) determined as Geophagus sveni Lucinda, Lucena & Assis, 2010 specimens previously assigned to Geophagus cf. proximus.…”