I am not sure how many of the new species has found their way into the pet trade. I know that some commercial breeders specializing in Xenopus has been selling species identified only by their genetic code (or as a "new species"). I have seen some species from European breeders that are not found in the U.S. Currently, the species for sale in the U.S. include X. laevis, X. muelleri, X. borealis and X. tropicalis. I find the frogs in the genus Xenopus fascinating because of their genetic makeup.