Pabstiella aurantiaca (Barb.Rodr.) Chiron (2011: 133) (Figure 11A) ≡ Pleurothallis aurantiaca Barb.Rodr. (1877: 10). Acianthera aurantiaca (Barb.Rodr.) Campacci (2008: 25). Specklinia aurantiaca (Barb. Rodr.) F.Barros & V.T.Rodrigues (2009: 24). Type:— BRAZIL. Minas Gerais: Serra dos Poços, Caldas (Poços de Caldas), 22. XII. 1876, J. Barbosa Rodrigues s.n. (holotype: lost: lectotype, designated here: Barbosa Rodrigues original illustration tab. 123, fig. A, vol. 2, in Iconogr. Orchid. Brésil at the Library of Rio de Janeiro Botanical Garden, cited as tab. 386 A (unpubl.) in Barb.Rodr. loc. cit; copied and reproduced in black and white in Cogn., Fl. Bras. (Mart.) 3(4), tab. 118, fig. IV, 1896: reproduced in color in Sprunger et al., 1996, vol. 1: 179). = Pleurothallis wanderbildtiana Pabst (1975: 54). Specklinia wanderbildtiana (Pabst) F.Barros & V.T.Rodrigues (2009: 24). Pabstiella wanderbildtiana (Pabst) F. Barros & C.F. Hall (2010: 31), syn. nov. Type:— BRAZIL. São Paulo: Serra da Bocaina, cultivated at Parque Nacional do Itatiaia, 15. XI. 1954 [fl.], D.B. Wanderbildt s.n. (holotype: HB). Taxonomic note:— described by Barbosa Rodrigues from a mountainous area near the border between Minas Gerais and São Paulo, the original material of Pleurothallis aurantiaca was presumably lost. Barbosa Rodrigues’ original color drawing remained inaccessible for a long period of time, and it was only effectively published by Sprunger et al. in 1996. Meanwhile, Pleurothallis wanderlibtiana was described by Guido Pabst based on material from São Paulo, near the border with Rio de Janeiro. Although the color of the flowers of P. wanderlibtiana was not mentioned in the protologue, the author compares it with Pabstiella crassicaulis (Barb. Rodr. 1881: 60) Luer (2007: 119), a yellow-flowered species with carinate sepals. Upon comparing the original drawing and protologue of P. aurantiaca with those of P. wanderbildtiana, it becomes evident that they belong to the same concept. Both, Barbosa Rodrigues and Guido Pabst describe a plant with ramicauls shorter than the leaves, spatulate, fleshy leaves, short inflorescences with yellow, fleshy flowers, sepals glandular within, petals oblong-unguiculate with rounded apex and lip oblong with erose margins.

Published as part of Morales, Nicolás Gutiérrez, Brito, A. L. V. Toscano De & Smidt, Eric De Camargo, 2023, Novelties and nomenclatural notes in Pabstiella (Orchidaceae) from the Brazilian Atlantic Rainforest of Bahia and Espírito Santo, pp. 161-179 in Phytotaxa 625 (2) on page 175, DOI: 10.11646/phytotaxa.625.2.3, http://zenodo.org/record/10150541