Table 4.

Collection sites, number of specimens, diploid number (2n) and B chromosome features of the Astyanax individuals analysed.

Species	Waterway	Coordinates	Specimens	2n	B type	B name
A. paranae	Cascatinha river	22°53′30″S 48°28′36″W	20	50	Large M	BpM
A. fasciatus	Água da Madalena stream	22°59′23″S 48°25′31″W	4	46	Large M	BfMa
A. bockmanni	Alambari river	22°27′6″S 49°14′25″W	7	50	Large M	BbM

M = metacentric, BpM = metacentric B in A. paranae, BfMa = metacentric B in A. fasciatus, BbM = metacentric B in A. bockmanni.