Microthelys is a genus of flowering plants from the orchid family, Orchidaceae. Its species are native to Mexico, Central America and Ecuador.

1. Microthelys constricta (Szlach.) Szlach. - central Mexico
2. Microthelys hintoniorum (Todzia) Szlach., Rutk. & Mytnik - Nuevo León
3. Microthelys intagana (Dodson & Dressler) Szlach. - Ecuador
4. Microthelys markowskiana (Szlach.) Szlach. - Oaxaca
5. Microthelys minutiflora (A.Rich. & Galeotti) Garay - from San Luis Potosí south to Guatemala
6. Microthelys nutantiflora (Schltr.) Garay - Guatemala, Costa Rica
7. Microthelys rubrocallosa (B.L.Rob. & Greenm.) Garay - from central Mexico south to Guatemala

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