Masdevallia diantha Schltr., Beih. Bot. Centralbl. 36: 384. 1918.

SYNTYPES: Costa Rica. [Alajuela:] Cerro de San Isidro, près San Ramon, 1300 m, juin 1901, A.M. Brenes s.n. (B, destroyed; lectotype, US, designated by Barringer, 1986; AMES; K ; tracings of Schlechter's drawings, AMES); [San José: Carrillo,] La Palma, 1500 m, im August 1912, C. Wercklé s.n. [843 in Herb. O. Jiménez] (B, destroyed; isosyntype, CR; isosyntype, K); 2500 m, im April 1910, C. Wercklé s.n. [673 in Herb. O. Jiménez] [B, destroyed; material at CR (33960!) under this number a mixed collection not referable to the type].

HETEROTYPIC SYNONYMS

Masdevallia chontalensis Rchb. f., Otia Bot. Hamburg. 1: 17. 1878.

Acinopetala chontalensis (Rchb. f.) Luer, Monogr. Syst. Bot. Missouri Bot. Gard. 105: 3. 2006.