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[[ Apteronotus albifrons (Linnaeus, 1766) ]]
Apteronotus albifrons (Linnaeus, 1766) is the most widespread apteronotid species, occurring from Napo River in Equador to rivers in the state of Maranhão , Brazil, and from the Orinoco River to the state of Rio Grande do Sul in Southern Brazil. There are no records of the species in the trans-Andean region (Albert, 2001) and eastern coastal rivers of Brazil (Campos-da-Paz, 1997). All black ghost knifefish populations are refereed to the specific name of A. albifrons , although there is a large variation in body shapes (de Santana, 2002). The aim of this paper is to describe a new species of Apteronotus ZBK related to A. albifrons from the Pantanal wetlands, Paraguay River basin, in the State of Mato Grosso do Sul, Central Brazil.