Browsing by Author "Menegoz, Kora"

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    Rayenia malalcurensis (Escalloniaceae), a new genus and species endemic to Central Chile
    (2021) Villarroel, Alejandro E.; Menegoz, Kora; Lavandero, Nicolas
    Rayenia, a new monotypic genus assigned here to the Escalloniaceae, is provided with a description of the type species Rayenia malalcurensis, endemic to San Fabian de Alico, Nuble Region, Central Chile. Molecular phylogenetics and morphological data support its placement in a new genus, separated from its sister taxon Tribeles australis. A detailed description, distribution map, insights about its ecology, conservation status and a key to the genera of Escalloniaceae in South America are given.
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    Phylogeny of Berberidopsidales based on nuclear and chloroplast loci, with the description of a new species of Berberidopsis endemic to Central Chile
    (2024) Menegoz, Kora; Villarroel, Alejandro E.; Lavandero, Nicolas
    Berberidopsidales comprises two families: monotypic Aextoxicaceae (Aextoxicon punctatum in Chile and Argentina) and Berberidopsidaceae. The latter includes Australian monotypic Streptothamnus (S. moorei) and Berberidopsis (B. beckleri in Australia and B. corallina in Chile). A new Berberidopsis species from the Central Chilean Andes is here described. Phylogenetic analyses based on nuclear and chloroplast data clarified the relationships within Berberidopsidales. The new species, Berberidopsis granitica, is sister to the Chilean endemic B. corallina, and this clade is sister to the Australian B. beckleri. The dated molecular phylogeny places the split between the South American B. corallina and B. granitica into the late Miocene/early Pleistocene and the split between South American and Australian Berberidopsis to the late Miocene and Pliocene, suggesting transoceanic dispersal rather than vicariance. Climatic niche analyses show two distinct and non-overlapping climatic niches for the Australian and southern South American species. Berberidopsis granitica and B. corallina also differ clearly in their habitat and morphology, in addition to their climatic niche. Berberidopsis granitica has a very restricted distribution area and grows in the Andes under montane climatic conditions, unique within Berberidopsidales.