There are something like 7 species in the genus Pogona, vitticeps being the standard bearded dragon. Besides that I think only henrylawsoni has any presence outside of australia. This is one of the other species.
*on a very brief googling of 'black pogona' it seems that this could be an Easter bearded dragon, Pogona barbata. And that there are in fact 7 species in this genus (according to wikipedia)