Dependng on which scientific circle you're looking to follow, liposarcus has been reinstated. Besides, it was always a synonym of pterygoplichthys to begin with, so either terminology is acceptable. Because of the far more widespread mass breeding of l. pardalis (scrophus and gibbis are also relatively common, though less so), almost all of the cases of albinism amongst "common" plecos are of said species. And, as T stated, dorsal hard rays say the fish belongs with pterygoplichthyi, not a hypostomini. In fact, there has not been a readily fixable strain of albino hypostomus for quite a while. Btw, where are you getting your information regarding the instating of an entirely, as of yet, undescribed pterygoplichthyiid as being what most people know as the albino (various forms) strain of both g. scrophus and l. pardalis? That is certainly news to me.