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Artículo

Late Cenozoic diversification of the austral genus Lagenophora (Astereae, Asteraceae)

Sancho, GiselaIcon ; De Lange, Peter; Donato, Mariano HumbertoIcon ; Barkla, John; Wagstaff, Steve J.
Fecha de publicación: 01/2015
Editorial: Oxford University Press
Revista: Botanical Journal of The Linnean Society
ISSN: 0024-4074
e-ISSN: 1095-8339
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Ciencias de las Plantas, Botánica

Resumen

Lagenophora (Astereae, Asteraceae) has 14 species in New Zealand, Australia, Asia, southern South America, Gough Island and Tristan da Cunha. Phylogenetic relationships in Lagenophora were inferred using nuclear and plastid DNA regions. Reconstruction of spatio-temporal evolution was estimated using parsimony, Bayesian inference and likelihood methods, a Bayesian relaxed molecular clock and ancestral area and habitat reconstructions. Our results support a narrow taxonomic concept of Lagenophora including only a core group of species with one clade diversifying in New Zealand and another in South America. The split between the New Zealand and South American Lagenophora dates from 11.2 Mya [6.1–17.4 95% highest posterior density (HPD)]. The inferred ancestral habitats were openings in beech forest and subalpine tussockland. The biogeographical analyses infer a complex ancestral area for Lagenophora involving New Zealand and southern South America. Thus, the estimated divergence times and biogeographical reconstructions provide circumstantial evidence that Antarctica may have served as a corridor for migration until the expansion of the continental ice during the late Cenozoic. The extant distribution of Lagenophora reflects a complex history that could also have involved direct long-distance dispersal across southern oceans.
Palabras clave: ANTARCTICA , AUSTRAL DISTRIBUTIONS , DIVERGENCE TIMES , MOLECULAR DATING , MOLECULAR PHYLOGENY , NEW ZEALAND , SOUTH AMERICA
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/22208
DOI: http://dx.doi.org/10.1111/boj.12224
URL: https://academic.oup.com/botlinnean/article-lookup/doi/10.1111/boj.12224
Colecciones
Articulos(ILPLA)
Articulos de INST.DE LIMNOLOGIA "DR. RAUL A. RINGUELET"
Citación
Sancho, Gisela; De Lange, Peter; Donato, Mariano Humberto; Barkla, John; Wagstaff, Steve J.; Late Cenozoic diversification of the austral genus Lagenophora (Astereae, Asteraceae); Oxford University Press; Botanical Journal of The Linnean Society; 177; 1; 1-2015; 78-95
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