I am not knowledgeable in stingrays - far from it - but I don´t see a single P. hystrix in there... which is natural because they do not occur in Peru.
P. orbigny, P. reticulatus and P. motoro (among other species), yes and I believe that is what you´ve got.
I know that some exporters sell the "Peru hystrix" but hose are NOT P. hystrix
But let the experts chime in