Re: Validity of status!
There has been very little work on the systematics of the Afrotropical stingless bees (save some taxonomic works). Whether genus or subgenus depends on the classification you follow. I treated them as valid in two recent papers (Rasmussen & Cameron, 2007, in press). Michener (1990, 2000, 2007) kept them under Meliponula.
You can read more about the Afrotropical stingless bees at Alain Pauly's excellent site (including a pdf of my 2007 paper and many others on Afrotropical stingless bees):
--- In firstname.lastname@example.org, "felbay2002" <felbay2002@...> wrote:
> All: I was wondering whether Axestotrigona, Apotrigona and Meliplebeia are valid genera of bees or they are subgenera under genus Meliponula.