Phylogeography of the Variable Antshrike (Thamnophilus caerulescens), a South American passerine distributed along multiple environmental gradients.

Abstract excerpt

The Neotropics show a wealth of distributional patterns shared by many co-distributed species. A distinctive pattern is the so-called "circum-Amazonian distribution," which is observed in species that do not occur in Amazonia but rather along a belt of forested habitats spanning south and east of Amazonia, the Andean foothills, and often into the Venezuelan Coastal Range and the Tepuis. Although this pattern is...

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