A new species, Ranitomeya defleri, has been described from southeastern Colombia. The species is sister to an undescribed species from Brazil. It is sympatric with R. variabilis and appears to breed in phytotelmata such as bromeliads and tree holes.
Twomey, E., & Brown, J. L. (2009). Another new species of Ranitomeya (Anura: Dendrobatidae) from Amazonian Colombia. Zootaxa, 2302, 48-60.