A new species of the South American genus Crenicichla has been described by Carmen Montaña, Hernán López-Fernández, and Donald C. Taphorn in a recent issue of the journal Zootaxa. The new species is named Crenicichla zebrina, from the common zebra for the striped African equid, referring to the zebra-like pattern of vertical dark bars in the caudal part of the bodyl.

Two new species of darter tetra have been described from eastern Brazil by Brazilian scientists Weferson da Graça, Carla Pavanelli, and Paulo Buckup in the latest issue of the journal Copeia. The two new species are named Characidium nupelia and Characidium xavante. Characidium is the most speciose genus of the family Crenuchidae, including 50 valid species, distributed in most freshwater drainages in tropical and subtropical areas of the Neotropical Region located between eastern Panama and La Plata, Argentina.