Brazilian ichthyologist Manoela Marinho has described a new Moenkhausia tetra from the upper Xingu River drainage in the most recent issue of the journal Neotropical Ichthyology.
The new tetra, named Moenkhausia eurystaenia, is distinguished by the presence of a broad, dark stripe running along the entire length of the body, 18–21 branched anal-fin rays, and the presence of 34 vertebrae, among other characters.
The name of the new species comes from the Greek eurys, meaning broad and the Latin taenia, meaning band, in reference to the broad, dark band present in this species.
For more information, see the paper: Marinho, MMF (2010) A new species of Moenkhausia Eigenmann (Characiformes: Characidae) from the rio Xingu basin, Brazil. Neotropical Ichthyology 8, pp. 655–659.