@ARTICLE{TreeBASE2Ref30123, author = {Diego L. Salariato and Asuncion L Cano and Fernando O. Zuloaga and Ihsan A. Al-Shehbaz}, title = {Molecular phylogeny of Cremolobus (Brassicaceae) supports the recognition of the new genus Yunkia and demonstrates the high habitat diversity of tribe Cremolobeae.}, year = {2020}, keywords = {Andes, CES clade, Cruciferae, hypervolumes, molecular phylogeny, climatic niche evolution, South America}, doi = {}, url = {http://}, pmid = {}, journal = {Systematics and Biodiversity}, volume = {}, number = {}, pages = {}, abstract = {Cremolobus is a genus of seven species distributed along the Andes from northern Argentina and Chile northward into Colombia, and inhabiting in a variety of different environments, from humid habitats as the Yungas in Bolivia and Argentina or the Andean Paramos in Colombia and Ecuador, to the arid regions of the Sechura desert in Peru. This genus, together with Aimara and Menonvillea, form the South American tribe Cremolobeae, which is morphologically defined by the indehiscent and 1-seeded schizocarpic silicles. To date, phylogenetic analyses in the tribe were mainly focused on Menonvillea and Aimara, but there are still no studies for species of Cremolobus. In this paper, we first studied the phylogenetic placement of Cremolobus within Cremolobeae using ribosomal nuclear (ITS) and chloroplast (trnL-F, trnH-psbA, rps16 intron) data, including a comprehensive sampling of taxa. We also analyzed morphological variation among species, emphasizing habitat adaptation and characterizing main lineages within the genus. Additionally, we studied the biome/habitat preference by the species and main lineages of Cremolobus and other members of the tribe, and characterized their climatic niches along the environmental space. Results from our analyses support the monophyly of Cremolobus excluding C. subscandens and C. bolivianus, which are transferred here to the new genus Yunkia. Furthermore, species of the Cremolobeae inhabit a wide diversity of habitats along the Andes that are associated with a high ecomorphological diversity, and therefore differing in this aspect from the related tribes Eudemeae and Schizopetaleae. Climatic niche comparison recovered low niche overlap between main lineages of the tribe, but high similarity among species of the same lineage, suggesting the presence of phylogenetic niche conservatism in the tribe. Systematic implications of these results, including a key distinguishing Yunkia from the remaining genera of Cremolobeae and a synopsis of its species, are also provided.} }

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