Horridocactus paucicostatus subsp. echinus (F.Ritter) Guiggi in Cactology 3: 8. 2012 Horridocactus paucicostatus subsp. echinus (F.Ritter) Guiggi in Cactology 3: 8. 2012is new combination for Pyrrhocactus echinus F.Ritter in Taxon 12: 33. 1963Taxon for this nameHorridocactus paucicostatus subsp. echinus (F.Ritter) Guiggi