Image | Scientific name | Distribution |
| Frailea alexandri Metzing | Paraguay. |
| Frailea altasensis Prestlé | Brazil (Rio Grande do Sul) |
 | Frailea amerhauseri Prestlé | Bolivia (Santa Cruz). |
 | Frailea buenekeri W.R.Abraham | Brazil (Rio Grande do Sul) |
 | Frailea castanea Backeb. | Argentina, Brazil and Uruguay |
 | Frailea cataphracta (Dams) Britton & Rose | Paraguay |
 | Frailea chiquitana Cárdenas | Bolivia |
 | Frailea curvispina Buining & Brederoo | Brazil |
| Frailea diersiana Schädlich | Bolivia. |
| Frailea erythracantha R.Pontes, A.S.Oliveira & Deble | Brazil (Rio Grande do Sul) |
| Frailea fulviseta Buining & Brederoo | Brazil |
| Frailea gracillima (Lem.) Britton & Rose | Brazil, Paraguay, and Uruguay |
 | Frailea mammifera Buining & Brederoo | Bolivia and Argentina |
 | Frailea phaeodisca (Speg.) Backeb. & F.M.Knuth | Brazil and Uruguay |
| Frailea piltzii C.A.L.Bercht & Schädlich | Paraguay |
 | Frailea pumila (Lem.) Britton & Rose | Brazil, Argentina, and Uruguay |
 | Frailea pygmaea (Speg.) Britton & Rose | Bolivia, Argentina, and Uruguay. |
 | Frailea schilinzkyana (F.Haage ex K.Schum.) Britton & Rose | Brazil to Argentina. |
| Frailea stockingeri Prestlé | Brazil (Rio Grande do Sul) |