Summary
Onuris hauthalii is a species distributed in Southern Argentina and Chile. Its generic assignment has been controversial, being included in Eudema, Brayopsis and Onuris. In order to clarify its generic affinities, we studied its morphology and phylogenetic relationships using multilocus/multispecies coalescent species-tree analyses based on four DNA regions (ITS, trnL-F, trnH-psbA, and rps16 intron). Results show that while O. hauthalii is related to Onuris s.s., it represents a well-differentiated lineage characterised primarily by having branched rhizomes, rosette flowering with ebracteate flowers, and latiseptate silicles. Based on the morphological and molecular evidence, we place this species in the new monospecific genus Alshehbazia. A description, morphological key, updated geographical distributions, map, and illustration are provided.
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Acknowledgements
Funding of this work was provided by ANPCyT (Agencia Nacional de Promoción Científica y Tecnológica) grant PICT-2013-1042, CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas) grants D4541-12 and PIP-112-201301-00124CO, and the National Geographic Society grant #9398-13, for which we are profoundly grateful. Fieldwork and visits to herbaria were also supported by the Myndel Botanical Foundation grants in 2011 and 2012. Our deep gratitude goes to Dr Ihsan A. Al-Shehbaz for his valuable support, guidance, and suggestions for this work and for the study of South American Brassicaceae over the years. We especially thank Dr David Simpson and the two anonymous reviewers for suggestions to improve an early version of this paper. We are grateful to the directors and curators of the herbaria listed and to Francisco Rojas for preparing the illustration.
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Salariato, D.L., Zuloaga, F.O. Taxonomic placement of Onuris hauthalii (Brassicaceae: Eudemeae), based on morphology and multilocus species tree analyses, and the recognition of the new genus Alshehbazia . Kew Bull 70, 49 (2015). https://doi.org/10.1007/s12225-015-9602-9
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DOI: https://doi.org/10.1007/s12225-015-9602-9