Our organization has bred hundreds of rays and we would like to shed some light here. We have breeding stock that was purchased as Bds and has produced amazing quality and average quality. We have also had common leos bred with Bds that give the same results. As DavidW said they are all leopoldis and grading of quality is based on the individual fish regardless if the parents are Bd or Leo.
Let me put it into perspective so everyone can understand. Coming from the wild a ray that is classified as Bd can be from parents of be either a Bd or Leo. Our breeding results have shown this to be true. So if the parent is a common Leo does it mean the fish is worth less. It is still being exported as a Bd and now it is in your tank and you are breeding it calling them pure.
Ask yourself who is classifying these fish?? Brazilian native fisherman!! Just because they call it Bd and sell it as Bd. I guess they have the final say.
Bottomline is.... Regardless of parents... Fish should be graded based on appearance just as the fisherman do it. The term 'pure' should not be used by any breeder because nobody really knows what goes on in the wild. Even to call them Sao Felix Leopoldis we cannot use the term pure because the exporter may not be telling the truth.
Great post, although I haven't owned rays like you have these are the words that have been on my mind as well........