Neotropical freshwater fishes (NFFs) constitute the most diverse continental vertebrate fauna
on Earth, with more than 6,200 named species compressed into an aquatic footprint< 0.5 …

Assessing biodiversity and understanding how it works is a prerequisite for species
conservation. The Amazon basin is one of the main biodiversity hotspots where fish are …

Cichlids are a conspicuous component of Amazonian ichthyofauna, filling a wide range of
niches. Yet taxonomy of many groups is still poorly known in the Amazon, and most of the …

A new species of Geophagus sensu stricto is described from the Tapajos River basin, Brazil,
elevating the number of species of the genus to 21. The new species is of commercial …

Alterations, such as drainage network reorganization, in the landscape in the Amazon basin
influence the distribution range and connectivity of aquatic biota and, therefore, their …

Neotropical cichlid fishes are one of the most diversified and evolutionarily successful
species assemblages. Extremely similar forms and intraspecific polychromatism present …

South American freshwater ichthyofauna is taxonomically the most diverse on the planet, yet
its diversity is still vastly underestimated. The Amazon basin alone holds more than half of …

ABSTRACT A new species of Odontostilbe is described from the rio Jaciparaná, rio Madeira
basin, Rondônia, Brazil. Odontostilbe pacaasnovos differs from all its congeners, except O …

Apistogramma megastoma sp. n. is described based on a total of 18 specimens from small
forest streams in the Departamento Loreto, Peru, tributaries of the Río Jutai in the border …

Phenotypic macroevolutionary studies provide insight into how ecological processes shape
biodiversity. However, the complexity of phenotype-ecology relationships underscores the …