Sistemática e biogeografia do complexo automolus infuscatus (aves: furnariidae): testando hipóteses de diversificação para o neotrópico
Abstract. Sistematics and Biogeography of the Automolus infuscatus complex (Aves:Furnariidae): Testing diversification hypotheses to the Neotropic. Recent revisions of the avian neotropical genus Automolus and the Furnariidae family pointed to the paraphyly of A. infuscatus and revealed a species...
| Autor principal: | Schultz, Eduardo de Deus |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/12044 http://lattes.cnpq.br/6652618216857326 |
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Abstract. Sistematics and Biogeography of the Automolus infuscatus complex
(Aves:Furnariidae): Testing diversification hypotheses to the Neotropic.
Recent revisions of the avian neotropical genus Automolus and the Furnariidae family
pointed to the paraphyly of A. infuscatus and revealed a species complex comprising A. infuscatus,
A.ochrolaemus, A. paraensis, A. leucophthalmus, A. lammi and A. subulatus, the latter historically
classified in the genus Hyloctistes. The detailed knowledge of the taxonomy, geographic
distribution, phylogenetic relationship and divergence times of a taxon allows to explore its
evolutionary history and test different scenarios of diversification. Different biogeographical
hipotheses were proposed to explain the patterns of distribution found in the neotropical lowland
forests biota, where the species of the complex inhabit. These hypotheses, generally, relate lineages
diversification to the geological evolution of the landscape and cycles of forestry expansion and
retraction associated with climatic variations. In this context, we inferred the phylogenetic
relationships, divergence times and biogeography of the A. infuscatus complex seeking to unveil the
cryptic diversity within the complex and reveal its evolutionary history. To do that we sequenced
two mitochondrial (ND2 and cytb) and three nuclear markers (G3PDH, ACO, Fib7) comprising 302
individuals belonging to all species in the complex and most described subspecies. Our analysis
support the paraphyly of A. infuscatus, indicating the existing of at least two distinct clades not
closely related. The remaining species were all recovered as monophyletic. Notwithstanding, a well
structured intraspecific diversity was found with 19 lineages suggesting a great cryptic diversity
within the described species. A. subulatus was recovered within the complex, corroborating its
positioning inside the genus. The patterns of distribution encountered match with known
distribution patterns of neotropical lowland birds. In spite of the high congruence between
distributions of different lineages, with several sister lineages currently separated by the same
barriers, the temporal incongruence between divergences of lineages co-separated by the same
barriers reveals a complex evolutionary history. While older events might be related with the
emergence of barriers such as the Andes and major amazonian rivers, younger events suggest
dispersal after the consolidation of those barriers. Our analysis suggest that the complex had its
origin around 6 million years (Ma) and inhabited Western Amazonia in Late Miocene-Early
Pliocene. Considering the riparian habit of species in its sister clade, the rise and early
diversifications of the complex may be related to the establishment of terra firme forests as it
changed form a floodplain to a fluvial system. |