Después de más de un siglo en el olvido resurge una especie en Dysopsis (Euphorbiaceae)

Murillo-A., José; López-Sepúlveda, Patricio; Fuentes, Glenda; Castro, Sergio

doi:10.4067/s0717-66432023000100049

Gayana Bot.

2023

DOI: 10.4067/s0717-66432023000100049

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Después de más de un siglo en el olvido resurge una especie en Dysopsis (Euphorbiaceae)

José Murillo-A.,

Patricio López-Sepúlveda,

Glenda Fuentes

et al.

Abstract: Se caracteriza por presentar hierbas postradas que crecen en lugares húmedos y sombríos (Müller-Argoviensis 1866, Pax & Hoffman 1914, Lozano & Murillo 2001). Dentro de los caracteres utilizados para reconocer las especies del género están el número de crenaciones en el margen de la lámina y el número de estambres (Müller-Argoviensis 1866, Lozano & Murillo 2001). El género inicialmente fue descrito por Baillon (1858) Después de más de un siglo en el olvido resurge una especie en Dysopsis (Euphorbiaceae) After m… Show more

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The challenging biogeography of the Juan Fernández Islands and Coast Range of central Chile explained by new models of East Pacific tectonics

Heads,

Saldivia

2024

Biological Reviews

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Biogeographers have often been puzzled by several unusual features in the Juan Fernández Islands (JFI) biota. These include the very high endemism density, multiple endemics that are older than the current islands, close biogeographic affinities with the central and West Pacific, and affinities with the diverse Coast Range of central Chile. We review aspects of biogeography in the JFI and the Coast Range in light of recent geological studies. These have examined the mantle below the East Pacific and South America, and have produced radical, new ideas on tectonic history. A long‐lived, intraoceanic archipelago ~9000 km long is now thought to have existed in the East Pacific (passing between the JFI hotspot and mainland Chile) until the mid‐Cretaceous. At this time, South America, which was moving westward with the opening of the Atlantic, collided with the archipelago. The assumption that the JFI biota is no older than its current islands is questionable, as taxa would have survived on prior islands produced at the JFI hotspot. We propose a new interpretation of evolution in the region based on tectonics rather than on island age and incorporating the following factors: the newly described East Pacific Archipelago; a long history for the JFI hotspot; metapopulation dynamics, including metapopulation vicariance; and formation of the Humboldt Current in the Cretaceous. The model accounts for many distinctive features of the JFI and Coast Range biota.

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The challenging biogeography of the Juan Fernández Islands and Coast Range of central Chile explained by new models of East Pacific tectonics

Heads,

Saldivia

2024

Biological Reviews

View full text Add to dashboard Cite

show abstract

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Después de más de un siglo en el olvido resurge una especie en Dysopsis (Euphorbiaceae)

Cited by 1 publication

References 16 publications

The challenging biogeography of the Juan Fernández Islands and Coast Range of central Chile explained by new models of East Pacific tectonics

The challenging biogeography of the Juan Fernández Islands and Coast Range of central Chile explained by new models of East Pacific tectonics

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