Deiregyne nonantzin (R. González ex McVaugh) Catling, Lindleyana 4: 186. 1989 sec. Salazar, G. A., Solano, R., Jiménez-Machorro, R., Carnevali, G., Hágsater, E. & Sosa, V. 2025: Revision of taxa, names and designations of Orchidaceae for the eFloraMEX.
- ≡Spiranthes nonantzin R. González ex McVaugh, Fl. Novo-Galiciana 16: 326. 1985 syn. sec. Salazar, G. A., Solano, R., Jiménez-Machorro, R., Carnevali, G., Hágsater, E. & Sosa, V. 2025: Revision of taxa, names and designations of Orchidaceae for the eFloraMEX.
- =Oestlundorchis nonantzin (R. González ex McVaugh) Szlach., Fragm. Florist. Geobot. 36(1): 27. 1991 syn. sec. Salazar, G. A., Solano, R., Jiménez-Machorro, R., Carnevali, G., Hágsater, E. & Sosa, V. 2025: Revision of taxa, names and designations of Orchidaceae for the eFloraMEX.
- =Schiedeella nonantzin (R. González ex McVaugh) R. González, Orquídea (Mexico City) n.s. 11: 271. 1988 syn. sec. Salazar, G. A., Solano, R., Jiménez-Machorro, R., Carnevali, G., Hágsater, E. & Sosa, V. 2025: Revision of taxa, names and designations of Orchidaceae for the eFloraMEX.