; Hort. Kew., ed. 2 [W.T.Aiton] 5: 211 (1813) s. str.
Distribution: Tropical America. Circumscription following Karremans (2016)
= Acronia C.Presl; Reliq. Haenk. 1: 103 (1827)
= Ancipitia (Luer) Luer; Monogr. Syst. Bot. Missouri Bot. Gard. 95 (Icon. Pleurothallid. XXVI): 254 (2004)
= Colombiana Ospina; Orquideologia 8(3): 230 (1973)
= Cryptophoranthus Barb.Rodr.; Gen. Sp. Orchid. 2: p. 79 (1882)
= Erectorostrata Brieger; Orchideen [Schlechter] 428 (1975), nomen
= Humboltia Ruiz & Pav.; Fl. Peruv. Prodr. 121, t. 27 (1794)
= Lalexia Luer; Harvard Pap. Bot. 16(2): 358 (2011), nom. nov. for Loddigesia Luer
= Lindleyalis Luer; Monogr. Syst. Bot. Missouri Bot. Gard. 95 (Icon. Pleurothallid. XXVI): 258 (2004)
= Loddigesia Luer; Monogr. Syst. Bot. Missouri Bot. Gard. 105 (Icon. Pleurothallid. XXVIII): 251 (2006), nom. inval.
= Lomax Luer; Monogr. Syst. Bot. Missouri Bot. Gard. 105 (Icon. Pleurothallid. XXVIII): 88 (2006)
= Mirandopsis Szlach. & Marg.; Polish Bot. J. 46(2): 117 (2001)
= Mixis Luer; Monogr. Syst. Bot. Missouri Bot. Gard. 95 (Icon. Pleurothallid. XXVI): 258 (2004)
= Orbis Luer; Monogr. Syst. Bot. Missouri Bot. Gard. 103 (Icon. Pleurothallid. XXVII): 308 (2005)
= Pleurobotryum Barb.Rodr.; Gen. Sp. Orchid. 1: 20 (1877)
= Pleurothallis subgen.Lalexia (Luer) Karremans; Lankesteriana 19(3): 338 (2019)
= Rhynchopera Klotzsch; Icon. Pl. Rar. [Link, Klotzsch & Otto] 103, t. 41 (1850)
= Talpinaria Karst.; Fl. Columb. [Karsten] 1: 153, t. 76 (1859)
= Tigivesta Luer; Monogr. Syst. Bot. Missouri Bot. Gard. 112 (Icon. Pleurothallid. XXIX): 121 (2007)
= Zosterophyllanthos Szlach. & Marg.; Polish Bot. J. 46(2): 118 (2001)