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| Andinia peruviana Ocupa, S.Vieira-Uribe & Mark Wilson, in Ocupa-Horna, Vieira-Uribe, Ward, Brose & Wilson, 2022. |
Abstract
A new species, Andinia peruviana, from Amazonas department, Peru, is described and illustrated. Updated phylogenetic analyses of nuclear internal transcribed spacer (nrITS) sequences in this study re-affirm the monophyletic nature of Andinia sensu lato and further support the previously proposed circumscription which incorporated genera Lueranthos, Masdevalliantha, Neooreophilus, and Xenosia. Andinia subgenus Aenigma was strongly supported in all analyses. The new species was determined phylogenetically to belong to subgenus Aenigma, along with A. barbata, A. dalstroemii, A. hirtzii, A. pogonion, A. schizopogon and A. uchucayensis. The phylogenetically-confirmed representatives of subgenus Aenigma are illustrated with drawings and photographs, and their geographic distribution is discussed. The updated phylogenetic analyses also show the corrected phylogenetic positions of A. vestigipetala, as the sole representative of the clade corresponding to subgenus Minuscula, and A. trimytera, as a member of the clade corresponding to subgenus Andinia.
Keywords: Aenigma species, endemic species, montane forests, neotropics, phylogeny, taxonomy
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| Andinia peruviana Ocupa, S.Vieira-Uribe & Mark Wilson. A. Habit. B. Flower. C. Dissected perianth. D. Lip, column and ovary, lateral and dorsal views. E. Column, ¾ view. F. Lip, adaxial (above) and abaxial (two views, below). G. Anther cap and pollinia. LCDP prepared by L. Ocupa Horna |
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| Andinia peruviana Ocupa, S.Vieira-Uribe & Mark Wilson in situ. A. Close-up of the flower. B. Detail of the plant growing on moss-covered tree trunk. C. Habitat. |
Andinia peruviana Ocupa, S.Vieira-Uribe & Mark Wilson, sp. nov.
Diagnosis: Andinia peruviana is most similar to Andinia schizopogon (Luer) Pridgeon & M.W.Chase (Fig. 6) but differs in the lateral sepals connate for ca. ⅔ of its length (vs. connate to less than ½ of their length), covered with hairs up to 5 mm long (vs. longpubescent-spiculate), with strongly revolute sides (vs. revolute sides), petals with tortuous cilia on the margins (vs. microscopically irregular margins), the apical mid-lobe of the lip with lacerate to filiform-papillose margins (vs. shortly muriculate), basal lobes of the lip with papillose margins (vs. entire margins).
Etymology: The specific name is in reference to the country where the type was first collected, Peru.
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| Photographs of the Andinia species subgenus Aenigma. A-B. A. barbata. C. A. dalstroemii. D-G. A. hirtzii. H-J. A. pogonion. K-M. A. schizopogon. N-O. A. peruviana. P. A. uchucayensis. Photographs by J.M. Pallandre (A), J. Ponert (B, G, O), Y. Dewèvre (C), M. Wilson (D, E, F, J, K, L, P), K. Olszowski (H), Kilian Zuchan (I), A. Diaz (M), L. Ocupa (N). Garden, vol. 103 |
Luis Ocupa-Horna, Sebastián Vieira-Uribe, Raven Ward, Caroline Brose and Mark Wilson. 2022. A New Species of Andinia (Pleurothallidinae) from Peru and An updated Phylogenetic Analysis of the Genus with Emphasis on Subgenus Aenigma. Lankesteriana: International Journal on Orchidology. 22(3); 241–262. DOI: 10.15517/lank.v22i3.53319
Resumen. Se describe e ilustra una nueva especie de Andinia, A. peruviana, procedente del departamento de
Amazonas, Perú. Los análisis filogenéticos actualizados de las secuencias del espaciador transcrito interno
nuclear (nrITS) en este estudio reafirman la naturaleza monofilética de Andinia sensu lato y apoyan aún
más la circunscripción propuesta anteriormente que incorporaba los géneros Lueranthos, Masdevalliantha,
Neooreophilus y Xenosia. El subgénero Aenigma de Andinia recibió un fuerte apoyo en todos los análisis.
Se determinó que la nueva especie pertenece filogenéticamente al subgénero Aenigma, junto con A. barbata,
A. dalstroemii, A. hirtzii, A. pogonion, A. schizopogon y A. uchucayensis. Los representantes del subgénero
Aenigma confirmados filogenéticamente se ilustran con dibujos y fotografías y se discute su distribución
geográfica. Los análisis filogenéticos actualizados también muestran las posiciones filogenéticas corregidas
de A. vestigipetala, como único representante del clado correspondiente al subgénero Minuscula, y de A.
trimytera, como miembro del clado correspondiente al subgénero Andinia.
