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Transoceanic origin of microendemic and flightless New Caledonian weevils.


ABSTRACT: The origin of the astonishing New Caledonian biota continues to fuel a heated debate among advocates of a Gondwanan relict scenario and defenders of late oceanic dispersal. Here, we study the origin of New Caledonian Trigonopterus flightless weevils using a multimarker molecular phylogeny. We infer two independent clades of species found in the archipelago. Our dating estimates suggest a Late Miocene origin of both clades long after the re-emergence of New Caledonia about 37?Ma. The estimation of ancestral ranges supports an ancestral origin of the genus in a combined region encompassing Australia and New Guinea with subsequent colonizations of New Caledonia out of New Guinea in the mid-Miocene. The two New Caledonian lineages have had very different evolutionary trajectories. Colonizers belonging to a clade of foliage dwellers greatly diversified, whereas species inhabiting leaf-litter have been less successful.

SUBMITTER: Toussaint EFA 

PROVIDER: S-EPMC5493895 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

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Transoceanic origin of microendemic and flightless New Caledonian weevils.

Toussaint Emmanuel F A EFA   Tänzler Rene R   Balke Michael M   Riedel Alexander A  

Royal Society open science 20170607 6


The origin of the astonishing New Caledonian biota continues to fuel a heated debate among advocates of a Gondwanan relict scenario and defenders of late oceanic dispersal. Here, we study the origin of New Caledonian <i>Trigonopterus</i> flightless weevils using a multimarker molecular phylogeny. We infer two independent clades of species found in the archipelago. Our dating estimates suggest a Late Miocene origin of both clades long after the re-emergence of New Caledonia about 37 Ma. The estim  ...[more]

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