| Arten: |
| Acianthera aculeata (Luer & Hirtz) Luer |
| Acianthera acuminatipetala (A.Samp.) Luer |
| Acianthera adamantinensis (Brade) F.Barros |
| Acianthera adirii (Brade) Pridgeon & M.W.Chase |
| Acianthera aechme (Luer) Pridgeon & M.W.Chase |
| Acianthera agathophylla (Rchb.f.) Pridgeon & M.W.Chase |
| Acianthera alligatorifera (Rchb.f.) Pridgeon & M.W.Chase |
| Acianthera angustisepala (Ames & Correll) Pridgeon & M.W.Chase |
| Acianthera antennata (Garay) Pridgeon & M.W.Chase |
| Acianthera aphthosa (Lindl.) Pridgeon & M.W.Chase |
| Acianthera asaroides (Kraenzl.) Pridgeon & M.W.Chase, |