They are under a constant state of reclassification. Pick your poison
I'd personally go with the list from dendrobates.org
Dendrobates.org - Dendrobatoidea
* Colostethinae (contains 4 genera)
o Ameerega (30 species)
o Colostethus (19 species)
o Epipedobates (5 species)
o Silverstoneia (3 species)
* Dendrobatinae (contains 7 genera)
o Adelphobates (3 species)
o Dendrobates (5 species)
o Excidobates (2 species)
o Minyobates (1 species)
o Oophaga (9 species)
o Phyllobates (5 species)
o Ranitomeya (26 species)
* Hyloxalinae (contains 1 genus)
o Hyloxalus (57 species)