After the publication of this work  the following errors were brought to the authors’ attention: Figure two contained a mistake that occurred during the editing process and karyotype assemblage so that two chromosome pairs (X1 and X2) were inadvertently duplicated in the karyotype of the female specimen - karyomorph D. The correct figure is given below (Figure 1).
Figure 1. Karyotypes of Hoplias malabaricus (karyomorphs A-D) arranged from chromosomes probed with 18S rDNA (yellow signals) and counterstained with propidium iodide. The sex chromosomes of karyomorphs B and D are boxed. Bar = 5 μm.
The authors would like to apologise for any confusion caused by this mistake.