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Despite discussions extending back almost 160 years, the means by which Madagascar's iconic land vertebrates arrived on the island remains the focus of active debate. Three options have been considered: vicariance, range expansion across land bridges, and dispersal over water. The first assumes that a group (clade/lineage) occupied the island when it was connected with the other Gondwana landmasses...
Due to its position between the highly distinct Oriental and Australasian biogeographical realms, much effort has been spent demarcating associated separations and transitions in the faunal assemblages of the Indo‐Australian Archipelago. Initially, sharp boundary lines were proposed, with the earliest dating from the mid‐1800s. Notably, the one published by Alfred R. Wallace in 1863, based upon land‐mammal...
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