GBIF classification (Originally found in sources as doubtful taxon within Neolloydia Britton & Rose) göre Homotypic synonym
Neolloydia mcdowellii (Rebut ex Quehl) H. E. Moore
GBIF classification (Originally found in sources as doubtful taxon within Neolloydia Britton & Rose) göre Homotypic synonym
Thelocactus bicolor var. wagnerianus (Berger) Krainz
GBIF classification (Originally found in sources as doubtful taxon within Thelocactus bicolor (Galeotti ex Pfeiff.) Britton & Rose) göre Homotypic synonym
Thelocactus conothele var. mcdowellii (Rebut ex Quehl) G. Glass & R. Foster
GBIF classification (Originally found in sources as doubtful taxon within Thelocactus conothele) göre Homotypic synonym
Thelocactus conothelos (Regel & Klein) F. M. Knuth