Swedish ichthyologist Sven Kullander has described a new species of pike cichlid from the Paran River drainage in Paraguay.
Naming the new species Crenicichla mandelburgeri after Paraguayan ichthyologist Daro Mandelburger, Kullander distinguishes the new species from congeners by the presence of numerous narrow vertical bars along the side in young specimens, which are replaced in adults by an irregular dark horizontal band, distinct caudal blotch, number of scales in a lateral row and the E1 row, lower jaw longer than upper, and serrated preopercular margin.
Some of the specimens were collected from rapids in a large stream, 5"10m wide, to 1m deep, with turbid, brownish water, while others came from small, shallow brown-water streams up to about 3m wide, with varying velocity and transparency, with bottom of sand and stones, and generally without vegetation.
For more information, see the paper: Kullander, SO (2009) Crenicichla mandelburgeri, a new species of cichlid fish (Teleostei: Cichlidae) from the Paran river drainage in Paraguay. Zootaxa 2006: 41"50.