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Checklist of the freshwater fishes of Colombia: a Darwin Core alternative to the updating problem
Updating the current checklist is a fundamental requirement to ensure its incorporation in the decision-making process with regard to the conservation of Colombian aquatic species and ecosystems, which are facing transformation processes as a result of activities such as mining, construction of hydroelectric plants, expansion of the agricultural frontier and subsequent deforestation.
Genetic and Morphometric Evidence for the Recognition of Several Recently Synonymized Species of Trans-Andean Rhamdia (Pisces: Siluriformes: Heptapteridae)
Evidence is presented here from DNA sequence data, external morphology, and morphometrics that argues for the recognition of R. guatemalensis in Central and northern South America and R. cinerascens in the Pacific drains of Colombia and Ecuador.
Cruciglanis, a new genus of Pseudopimelodid catfish (Ostariophysi: Siluriformes) with description of a new species from the Colombian Pacific coast
The phylogenetic position of the new genus, Cruciglanis pacifici, is proposed and new insights in the family interrelationships are presented.
Panaque nigrolineatus laurafabianae, a new, commercially exploited subspecies of ornamental wood-eating pleco (Loricariidae: Hypostominae) from the Guaviare River basin in Colombia.
A phenotypically distinct population of P. nigrolineatus from the Guaviare River in southern Colombia at the southwesternmost corner of the Orinoco River basin is examined and it is proposed to recognize this population as a distinct subspecies of the Royal Pleco.
Ancient genetic divergence in bumblebee catfish of the genus Pseudopimelodus (Pseudopimelodidae: Siluriformes) from northwestern South America
Results indicate high levels of genetic divergence among individuals of nominal P. schultzi and P. bufonius in Colombia, and molecular-clock dating showed that most diversification processes in Pseudopimelodus took place during the Miocene, when Andean tectonic evolution was occurring in northwestern South America.
Two new species of Pseudopimelodus Bleeker, 1858 (Siluriformes: Pseudopimelodidae) from the Magdalena Basin, Colombia
A phylogenetic analysis using a fragment of the Cytochrome C Oxidase subunit 1 gene (COI) and analyzed osteological and traditional morphometric characters provided strong support for two clades phylogenetically related to Pseudopimelodus, that showed clear-cut molecular, osteological, and morphometric differences from previously described bumblebee catfishes.
Two new trans-Andean species of Imparfinis Eigenmann & Norris, 1900 (Siluriformes: Heptapteridae) from Colombia
Two new species of Imparfinis are described from the trans-Andean region of Colombia, one of them only known from rio Guarapas, and the other broadly distributed in the upper basin of rios Cauca and Magdalena and in the lower Patia river basin.
Characidium chancoense, a new species of South American darter from the Río Cauca drainage, Colombia (Characiformes: Crenuchidae).
Characidium chancoense new species, is described from the transandean upper Río Cauca drainage in Colombia. It can be distinguished from all congeners by its pigmentation pattern that consists of
Species delimitation reveals an underestimated diversity of Andean catfishes of the family Astroblepidae (Teleostei: Siluriformes)
Catfishes of the family Astroblepidae form a group composed by 82 valid species of the genus Astroblepus inhabiting high-gradient streams and rivers throughout tropical portions of the Andean
Rediscovery of the holotype of Characidium sanctjohanni Dahl 1960 (Characiformes: Crenuchidae) from the Colombian Pacific slope
Presentamos el redescubrimiento de la especie Characidium sanctjohanni descrita por Dahl (1960), lote que se encontraba perdido en el ICN. Tomamos conteos, medidas y fotografias para comparar los