A new species of rivuline killifish has been described from the Amazonas region of Brazil.
The new killi, which has been named Rivulus duckensis, has just been described by Hrbek, de Deus and Farias in a paper in the ichthyological journal Copeia.
The killi was found in the Reserva Adolpho Ducko in Manaus, and is believed to be a sister taxon to a group of Rivulus found in the upper Orinoco in Venezuela and Peru.
For more details see the paper: Tomas Hrbek, Cludia Pereira de Deus,and Izeni Pires Fariasa (2004) - Rivulus duckensis (Teleostei; Cyprinodontiformes): New Species from the Tarum Basin of Manaus, Amazonas, Brazil, and Its Relationship to Other Neotropical Rivulidae. Copeia: Vol. 2004, No. 3, pp. 569-576.