| Thelocactus aguirreanus (Glass & Foster) Bravo |
Synonym |
 |
TRO |
| Thelocactus beguinii N.P. Taylor |
Synonym |
 |
TRO |
| Thelocactus bicolor (Galeotti) Britton & Rose |
Accepted |
 |
TRO |
| Thelocactus bicolor subsp. bicolor |
Accepted |
 |
TRO |
| Thelocactus bicolor subsp. bolaensis (Runge) Doweld |
Accepted |
 |
TRO |
| Thelocactus bicolor var. bolaensis (Runge) A. Berger |
Synonym |
 |
TRO |
| Thelocactus bicolor subsp. flavidispinus (Backeb.) N.P. Taylor |
Accepted |
 |
TRO |
| Thelocactus bicolor var. flavidispinus Backeb. |
Synonym |
 |
TRO |
| Thelocactus bicolor var. pottsii Britton & Rose |
Synonym |
 |
TRO |
| Thelocactus bicolor var. schottii (Engelm.) Krainz |
Synonym |
 |
TRO |
| Thelocactus bicolor subsp. schwarzii (Backeb.) N.P. Taylor |
Accepted |
 |
TRO |
| Thelocactus buekii (Klein) Britton & Rose |
Synonym |
 |
TRO |
| Thelocactus conothelos (Regel & Klein) F.M. Knuth |
Accepted |
 |
TRO |
| Thelocactus conothelos var. argenteus Glass & R.A. Foster |
Synonym |
 |
TRO |
| Thelocactus conothelos subsp. argenteus (Glass & R.A. Foster) Glass |
Accepted |
 |
TRO |
| Thelocactus conothelos var. aurantiacus Glass & R.A. Foster |
Synonym |
 |
TRO |
| Thelocactus conothelos subsp. aurantiacus (Glass & R.A. Foster) Glass |
Accepted |
 |
TRO |
| Thelocactus conothelos subsp. flavus (Mosco & Zanov.) Mosco & Zanov. |
Accepted |
 |
TRO |
| Thelocactus conothelos subsp. garciae (Glass & M.L. Mend.) Mosco & Zanov. |
Accepted |
 |
TRO |
| Thelocactus crassihamatus (F.A.C. Weber) W.T. Marshall |
Synonym |
 |
TRO |
| Thelocactus dasyacanthus (Engelm.) W.T. Marshall |
Synonym |
 |
TRO |
| Thelocactus durangensis (Ruenge) G.D. Rowley |
Synonym |
 |
TRO |
| Thelocactus ehrenbergii (Pfeiff.) F.M. Knuth |
Synonym |
 |
TRO |
| Thelocactus erectocentrus (J.M.Coult.) W.T.Marshall |
Unresolved |
 |
WCSP (in review) |
| Thelocactus flavidispinus (Backeb.) Backeb. |
Unresolved |
 |
WCSP (in review) |
| Thelocactus flavus Mosco & Zanov. |
Synonym |
 |
TRO |
| Thelocactus fossulatus (Scheidw.) Britton & Rose |
Synonym |
 |
TRO |
| Thelocactus garciae Glass & M.L. Mend. |
Synonym |
 |
TRO |
| Thelocactus gielsdorfianus (Werderm.) W.T.Marshall |
Unresolved |
 |
WCSP (in review) |
| Thelocactus gielsdorfianus (Werderm.) Borg |
Unresolved |
 |
WCSP (in review) |
| Thelocactus goldii Bravo |
Synonym |
 |
TRO |
| Thelocactus hastifer (Werderm. & Boed.) F.M. Knuth |
Accepted |
 |
TRO |
| Thelocactus hertrichii (Weinberg) Borg |
Unresolved |
 |
WCSP (in review) |
| Thelocactus heterochromus (F.A.C. Weber) Oosten |
Accepted |
 |
TRO |
| Thelocactus hexaedrophorus (Lem.) Britton & Rose |
Accepted |
 |
TRO |
| Thelocactus hexaedrophorus subsp. hexaedrophorus |
Accepted |
 |
TRO |
| Thelocactus hexaedrophorus subsp. lloydii (Britton & Rose) Kladiwa & Fittkau |
Accepted |
 |
TRO |
| Thelocactus horripilus (Lem.) Kladiwa |
Unresolved |
 |
WCSP (in review) |
| Thelocactus intertextus (Engelm.) W.T.Marshall |
Unresolved |
 |
WCSP (in review) |
| Thelocactus johnsonii (Parry ex Engelm.) W.T.Marshall |
Unresolved |
 |
WCSP (in review) |
| Thelocactus knuthianus (Boed.) Borg |
Synonym |
 |
TRO |
| Thelocactus krainzianus Oehme |
Synonym |
 |
TRO |
| Thelocactus lausseri Riha & Busek |
Accepted |
 |
TRO |
| Thelocactus leucacanthus (Zucc. ex Pfeiff.) Britton & Rose |
Accepted |
 |
TRO |
| Thelocactus leucacanthus var. ehrenbergii (Pfeiff.) Bravo |
Synonym |
 |
TRO |
| Thelocactus leucacanthus subsp. leucacanthus |
Accepted |
 |
TRO |
| Thelocactus leucacanthus var. porrectus (Lem.) Backeb. |
Synonym |
 |
TRO |
| Thelocactus leucacanthus var. sanchezmejoradai (J. Meyrán) Backeb. |
Synonym |
 |
TRO |
| Thelocactus leucacanthus subsp. schmollii (Werderm.) Mosco & Zanov. |
Accepted |
 |
TRO |
| Thelocactus leucacanthus var. schmollii Werderm. |
Synonym |
 |
TRO |
| Thelocactus lloydii Britton & Rose |
Synonym |
 |
TRO |
| Thelocactus lophophoroides Werderm. |
Synonym |
 |
TRO |
| Thelocactus lophothele (Salm-Dyck) Britton & Rose |
Synonym |
 |
TRO |
| Thelocactus lophothele var. nidulans (Quehl) Kladiwa & Fittkau |
Synonym |
 |
TRO |
| Thelocactus macdowellii (Rebut ex Quehl) W.T. Marshall |
Accepted |
 |
TRO |
| Thelocactus mandragora A.Berger |
Unresolved |
 |
WCSP (in review) |
| Thelocactus matudae Sánchez-Mej. & A.B. Lau |
Synonym |
 |
TRO |
| Thelocactus × mirandus Halda & Panar. |
Unresolved |
 |
WCSP (in review) |
| Thelocactus multicephalus Halda & Panar. ex Halda |
Synonym |
 |
TRO |
| Thelocactus nidulans (Quehl) Britton & Rose |
Synonym |
 |
TRO |
| Thelocactus panarottanus Halda |
Accepted |
 |
TRO |
| Thelocactus phymatothele (Poselger in Foerster) Britton & Rose |
Synonym |
 |
TRO |
| Thelocactus porrectus (Lem.) F.M. Knuth |
Synonym |
 |
TRO |
| Thelocactus pottsii (Salm-Dyck) Britton & Rose |
Synonym |
 |
TRO |
| Thelocactus pseudopectinatus (Backeb.) E.F.Anderson & Boke |
Unresolved |
 |
WCSP (in review) |
| Thelocactus rinconensis (Poselger) Britton & Rose |
Accepted |
 |
TRO |
| Thelocactus rinconensis subsp. freudenbergeri (R. Haas) Mosco & Zanov. |
Accepted |
 |
TRO |
| Thelocactus rinconensis var. freudenbergeri R. Haas |
Synonym |
 |
TRO |
| Thelocactus rinconensis subsp. multicephalus (Halda & Panar. ex Halda) Lüthy |
Accepted |
 |
TRO |
| Thelocactus rinconensis subsp. nidulans (Quehl) Glass |
Accepted |
 |
TRO |
| Thelocactus rinconensis var. nidulans (Quehl) Glass & R.A. Foster |
Synonym |
 |
TRO |
| Thelocactus rinconensis subsp. phymatothele (Poselger ex Rumpler) Glass |
Accepted |
 |
TRO |
| Thelocactus rinconensis var. phymatothele (Poselger ex Rumpler) Glass & R.A. Foster |
Synonym |
 |
TRO |
| Thelocactus rinconensis subsp. rinconensis |
Accepted |
 |
TRO |
| Thelocactus roseanus (Boed.) W.T. Marshall |
Synonym |
 |
TRO |
| Thelocactus sanchezmejoradai J. Meyrán |
Synonym |
 |
TRO |
| Thelocactus santaclarensis Halda, Kupcák & Sladk. |
Unresolved |
 |
WCSP (in review) |
| Thelocactus saueri (Boed.) A. Berger |
Synonym |
 |
TRO |
| Thelocactus saussieri (F.A.C.Weber) A.Berger |
Unresolved |
 |
WCSP (in review) |
| Thelocactus schottii (Engelm.) Kladiwa & Fittkau |
Unresolved |
 |
WCSP (in review) |
| Thelocactus schwarzii Backeb. |
Synonym |
 |
TRO |
| Thelocactus setispinus (Engelm.) E.F. Anderson |
Accepted |
 |
TRO |
| Thelocactus smithii (Muehlenpf.) Borg |
Unresolved |
 |
WCSP (in review) |
| Thelocactus subterraneus Backeb. |
Synonym |
 |
TRO |
| Thelocactus tulensis (Poselger) Britton & Rose |
Accepted |
 |
TRO |
| Thelocactus tulensis subsp. buekii (Klein) N.P. Taylor |
Accepted |
 |
TRO |
| Thelocactus tulensis subsp. matudae (Sánchez-Mej. & A.B. Lau) E.F. Anderson |
Accepted |
 |
TRO |
| Thelocactus uncinatus (Galeotti ex Pfeiff.) W.T. Marshall |
Synonym |
 |
TRO |
| Thelocactus unguispinus (Engelm.) G.D. Rowley |
Synonym |
 |
TRO |
| Thelocactus valdezianus |
Synonym |
 |
TRO |
| Thelocactus vaskoanus Halda, Hovorka & Zatloukal |
Unresolved |
 |
WCSP (in review) |
| Thelocactus viereckii (Werderm.) Werderm. |
Unresolved |
 |
WCSP (in review) |
| Thelocactus viereckii (Werderm.) Borg |
Unresolved |
 |
WCSP (in review) |
| Thelocactus wagnerianus A.Berger |
Unresolved |
 |
WCSP (in review) |
| Thelocactus ysabelae Schlange |
Synonym |
 |
TRO |
| Thelocactus ysabelae var. brevispinus Schlange |
Synonym |
 |
TRO |