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Systematic studies in Neotropical Rinorea (Violaceae): Two new sections and a new generic segregate

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Rinorea, the second most species-rich genus in the Violaceae, has been shown to be polyphyletic with four separate clades recovered in phylogenetic studies. Among these clades is the Rinorea crenata… Click to show full abstract

Rinorea, the second most species-rich genus in the Violaceae, has been shown to be polyphyletic with four separate clades recovered in phylogenetic studies. Among these clades is the Rinorea crenata group, which is composed of three Neotropical species. This group has been shown in family- and genus-level molecular phylogenies to be resolved outside of a large clade representing Rinorea s.str. Based on phylogenetic, morphological, and anatomical evidence, Bribria, a new genus, is segregated from Rinorea s.str. and described, with new combinations made for its three species: Bribria apiculata, Bribria crenata, and Bribria oraria. In addition, two new sections in Rinorea s.str. are described to accommodate the remaining Neotropical species: Rinorea sect. Rinorea and Rinorea sect. Pubiflora, which correspond to Group IIa Rinorea and Group IIc Pubiflora, respectively, in W. H. A. Hekking’s monograph of Neotropical Rinorea.ResumenSe ha demostrado que Rinorea, el segundo género más rico en especies de la família Violaceae, es polifilético con cuatro clados independientes, recuperados en estúdios filogenéticos. Entre estos clados está el grupo de Rinorea crenata, que está compuesto por tres especies neotropicales. Este grupo ha mostrado en filogenias a nível de família y género estar resuelto por fuera del gran clado representado por Rinorea s. str.. Basado en filogenias moleculares, evidencias morfológicas y anatómicas, un nuevo género, Bribria, es segregado de Rinorea s. str. y descrito con las nuevas combinaciones realizadas para estas trés especies: Bribria apiculata, Bribria crenata, y Bribria oraria. Adicionalmente, dos nuevas secciones de Rinorea s. str. son descritas para acomodar las especies neotropicales faltantes: Rinorea sect. Rinorea y Rinorea sect. Pubiflora, los cuales corresponden al Grupo IIa Rinorea y Grupo IIc Pubiflora, respectivamente, en la monografía Neotropical de Rinorea de W. H. A. Hekking.

Keywords: violaceae; two new; neotropical rinorea; rinorea str; new sections; rinorea

Journal Title: Brittonia
Year Published: 2017

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