In my previous blog post i touched upon the occurrence of hybridizations between the different species of the genus Potamotrygon, which suggests a close relationship between the species. Most of the around 18 described* species in this genus show a large range of coloration patterns. Giving a example, there are several variants of P. motoro (just searching on Google for pictures reveal the range). there are everything from plain motoro rays with a dark brown background color and orange spots to the marbled variants with all their amazing patterns. Given that the other species in the genus also show this polychromatic appearance make it difficult sometimes to draw lines between the different species. This makes it important to use new tools to be able to establish the evolutionary origins and relationships between the different species in the genus and also within the Potamotrygonidae family.
|Figure 1. My old pair of P. motoro with the male showing courting behavior. This pair was wild caught, the male was from Colombia and the female from Peru.|
The Potamotrygonidae family is the only family of batoids