Table 1 

Karyomorphs previously identified in Hoplias malabaricus according to Bertollo et al. (2000). 

Karyomorphs 
Chromosome number 
Sex Chromosomes 
Geographic occurrence 


Group I: first chromosome pairs of similar sizes 

Karyomorph A 
2n = 42 
 
Northen to southern Brazil, Uruguay and northen Argentina 
Karyomorph B 
2n = 42 
XX/XY 
Vale do Rio Doce (Minas Gerais State) and Iguaçú River (Paraná State, Brazil) 
Karyomorph C 
2n = 40 
 
Northen Brazil to northen Argentina 
Karyomorph D 
Female  2n = 40/Male  2n = 39 
X_{1}X_{1}X_{2}X_{2}/X_{1}X_{2}Y 
Upper Paraná hydrographic basin, Brazil 
Group II: first chromosome pairs with clearly distinct sizes 

Karyomorph E 
2n = 42 
 
Trombetas River (Paraná State, Brazil) 
Karyomorph F 
2n = 40 
 
Surinam to southeastern Brazil 
Karyomorph G 
Female  2n = 40/Male  2n = 41 
XX/XY_{1}Y_{2} 
Amazonian Rivers, Brazil 


Cioffi et al. BMC Genetics 2009 10:34 doi:10.1186/147121561034 