Compared to Potamotrygon henlei, what is a noted difference in the back coloration of P. leopoldi?
Answer
P. leopoldi presents a deeper black coloration on its back
Morphological distinctness exists between *P. leopoldi* and its relatives in neighboring river systems due to isolation. When directly comparing the Xingu River Ray with *Potamotrygon henlei*, which resides in the Tocantins River basin, a key difference noted is that *P. leopoldi* displays a visibly deeper black coloration across its back surface. This difference in dorsal base tone, alongside variations in spot size and number observed when compared to species like *P. albimaculata*, contributes to the overall morphological confirmation of *P. leopoldi*'s distinct species status shaped by its unique habitat.
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