Abstract:
Alloneuron trinervium, a new species of Melastomataceae known only from the type locality in Antioquia Department, northwestern Colombia, is described and illustrated. This new species is the only one in Alloneuron with three basal veins, a venation pattern that is intermediate between semi-craspedodromous (found in all other members of the genus) and acrodromous (predominant in the rest of the family). Alloneurum trinervium is further distinguished by the paniculate inflorescences with 4-merous, pedicellate flowers arranged in monochasial cymes bearing 3(−5) flowers along the filiform paracladia. This is the first species in the genus found in an inter-Andean valley and not in the eastern slope of the Andes.
Resumen:
Se describe e ilustra Alloneuron trinervium, una nueva especie de Melastomataceae conocida sólo de su localidad tipo en el departamento de Antioquia, noroeste de Colombia. Esta nueva especie es la única del género con tres venas basales, un patrón de venación intermedio entre semicraspedódroma (el cual se encuentran en las restantes especies del género) y acródroma (predominante en el resto de la familia). Alloneurum trinervium, se distingue adicionalmente por las inflorescencias paniculadas con flores 4-meras, pediceladas, dispuestas en cimas monocasiales de 3(−5) flores en paracladios filiformes. Esta es la primera especie del género conocida de un valle inter-Andino y no de la vertiente oriental del los Andes.
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Acknowledgements
We wish to thank the coordinators of the Colombia BIO: ANORI Project, the Colombia BIO: ANORI, Colciencias and the researchers and students from the Antioquia, Universidad EAFIT, and Universidad CES that participated in the expedition. We are also indebted to the former combatants from “Espacios Territoriales de Capacitación y Reincorporación ETCR” from Vereda La Plancha, and representatives of the local communities in the Anorí Municipality whose participation was fundamental to the success of the expedition and the discovery of this new species. We thank Adriana Sanín for the botanical illustration, Esteban Domínguez for the field photographs, Ana Cristina Pareja for editing them, and the curators at COAH, COL, CORD, F, HUA, MO, NY, US for access to their collections and/or for sending specimen loans necessary for this research. We received additional support from U.S. National Science Foundation (DEB-2001357, DEB-2002270, DBI-1828479). We also acknowledge the generous support of FAM by Jayne and Leonard Abess.
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Murillo-Serna, J.S., Michelangeli, F.A. & David-Higuita, H.A. Alloneuron trinervium (Melastomataceae: Cyphostyleae), a new species from Colombia. Brittonia 74, 43–52 (2022). https://doi.org/10.1007/s12228-021-09680-x
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DOI: https://doi.org/10.1007/s12228-021-09680-x