Color morphs
Some poison dart frogs species include a number of conspecific color morphs that emerged as recently as 6,000 years ago.[12] Therefore, species such as Dendrobates tinctorius, Oophaga pumilio, and O. granulifera can include color pattern morphs that can be interbred (colors are under polygenic control, while the actual patterns are probably controlled by a single locus).[15] Differing coloration has historically misidentified single species as separate, and there is still controversy among taxonomists over classification.[16]
Variation in predation regimens may have influenced the evolution of polymorphism in O. granulifera,[17] while sexual selection appears to have contributed to differentiation among the Bocas del Toro populations of Oophaga pumilio.[18][19][20]