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Hypotheses to explain the origin of species in Amazonia

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Academic year: 2019

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Table 1. Hypotheses of geographic speciation in Amazonia during the Tertiary and Quaternary periods (Cenozoic), as proposed by various authors.
Figure 1. Speciation models proposed for Amazonia (schematic representation). a-c) Paleogeographic hypotheses
Figure 2. Thickness maps of the Tertiary Solimoes Formation (above) and the Cretaceous Alter do Chao Formation (below)  in Amazonia
Figure  3. Barrier effect of broad river valleys for birds in  Amazonia (open circles) and main avian dispersion routes  (Open  circles  illustrate)  in  interfluvial  regions  and  in  the  headwater areas of major rivers, where the latter cease to act  a
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