The English translation of the specific latin epithet "ligo" is "to tie or unite" . To my view this is the first species that links Haworthia silviae ( pygmaea argenteo-maculosa) to Haworthia fusca from Albertinia. I use the epithet "silviae" since "argenteo-maculosa" lacks clear locality data and also was never properly described. ( As per Dr. Hayashi - private communication)
Both H silviae and H fusca are probably themselves links between Haworthia pygmaea from the Mossel Bay area and Haworthia retusa from the Riversdale area respectively. Those that like to lump species together may want to consider many of the Haworthia between Riversdale (or perhaps even further west) to around Mossel Bay in the east as a single species. Odd ones out would likely be splendens, esterhuizenii and vincentii to name but three. Lumping would not be an adequate solution however, as it will only cause confusion.