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Hylexetastes Woodcreepers

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Old Thursday 15th November 2018, 09:16   #1
Daniel Philippe
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Hylexetastes Woodcreepers

Azuaje-Rodríguez R.A., Weckstein J.D., Dispoto J.H., Patel S., Cacioppo J.A., Bates J.M., Marques Silva S. & Aleixo A., in press. Molecular systematics of the Amazonian endemic genus Hylexetastes (Aves: Dendrocolaptidae): taxonomic and conservation implications.

Abstract

Hylexetastes woodcreepers are endemic to the Terra Firme forests of the Amazon basin. Currently, most taxonomic sources recognize two species of Hylexetastes (H. perrotti and H. stresemanni), each divided into three subspecies. Some authors maintain that the subspecies H. perrotti be elevated to full species status. In particular, H. p. brigidai is endemic to the eastern Amazon, the second Amazonian area of endemism (Xingu) most affected by deforestation and habitat degradation. Consequently, the taxonomic status of H. p. brigidai is of special concern for conservation. Thus far, only morphological characters have been evaluated for the taxonomic delimitation of species and subspecies of Hylexetastes. We present a molecular phylogenetic analysis of all subspecies to help delimit Hylexetastes interspecific limits. Fragments of two mitochondrial (Cytb and ND2) and three nuclear genes (FGB5, G3PDH and MUSK) from 57 Hylexetastes specimens were sequenced. An ecological niche model was estimated to describe more accurately the potential distributions of taxa and to evaluate their vulnerability to ongoing deforestation. Phylogenetic analyses support the paraphyly of the polytypic H. perrotti as currently delimited and the elevation of H. p. uniformis to full species rank, as well as the presence of three Evolutionary Significant Units (ESUs) within this newly delimited species, including one grouping all H. p. brigidai specimens. Alternatively, under lineage-based species concepts, our results support at least five evolutionary species in Hylexetastes: H. stresemanni; H. undulatus; H. perrotii; H. uniformis; and H. brigidai. Each of these taxa and ESUs are distributed in different interfluvial areas of the Amazon basin, which have different degrees of disturbance. Because they occupy the most heavily impacted region among all Hylexetastes ESUs, regular assessments of the conservation statuses of H. p. brigidai and both H. uniformis ESUs are paramount.
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Old Thursday 15th November 2018, 09:35   #2
LeNomenclatoriste
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Do you have the name or a link of the journal please?

Last edited by LeNomenclatoriste : Thursday 15th November 2018 at 09:54.
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Old Thursday 15th November 2018, 09:53   #3
Peter Kovalik
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Quote:
Originally Posted by Daniel Philippe View Post
Azuaje-Rodríguez R.A., Weckstein J.D., Dispoto J.H., Patel S., Cacioppo J.A., Bates J.M., Marques Silva S. & Aleixo A., in press. Molecular systematics of the Amazonian endemic genus Hylexetastes (Aves: Dendrocolaptidae): taxonomic and conservation implications.
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Old Thursday 15th November 2018, 18:40   #4
Peter Kovalik
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Quote:
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Azuaje-Rodríguez R.A., Weckstein J.D., Dispoto J.H., Patel S., Cacioppo J.A., Bates J.M., Marques Silva S. & Aleixo A., in press. Molecular systematics of the Amazonian endemic genus Hylexetastes (Aves: Dendrocolaptidae): taxonomic and conservation implications.
Also

Rodríguez, Roxiris Auxiliadora Azuaje. Sistemática molecular e implicações para a conservação de uma linhagem endêmica da Amazônia: o gênero Hylexetastes Sclater, 1889 (Aves: Dendrocolaptidae). 2017. 70 f. Dissertação (Mestrado) - Universidade Federal do Pará, Museu Paraense Emílio Goeldi, Instituto de Ciências Biológicas, Belém, 2017. Programa de Pós-Graduação em Zoologia. Disponível em: <http://repositorio.ufpa.br/jspui/handle/2011/9407>.

Abstract:

The genus Hylexetastes is endemic to the Amazon rainforest. Currently, two species are accepted in the genus (H. perrotti and H. stresemannii), each one divided into three subspecies. Nevertheless, some authors defend that the subspecies of H. perrotti should be considered as full species. In particular, H. p. brigidai is an endemic taxon from Pará and Mato Grosso and seems to have the smallest distribution area. This lineage is distributed by the most deforested region within the biome and thus its taxonomic status is of particular concern for conservation. So far, only morphological characters have been evaluated for taxonomic definition of this genus. Therefore, in this study we present a molecular phylogenetic hypothesis to help solve the taxonomic uncertainties within the genus. Fragments of two mitochondrial markers (Cytb and ND2) and three nuclear markers (BF5, G3PDH and MUSK) were sequenced on 58 Hylexetastes specimens. In addition, ecological niche modeling was developed for each of the identified strains to evaluate their potential distribution area, climatic requirements and their vulnerability to deforestation. The phylogenetic analyzes support the designation of H. perrotti, H. uniformis and H. brigidai as full species, and H. perrotti seems to be a sister species of H. stresemanni and not of the other taxa considered co-specific. In addition, it was possible to distinguish the presence of two Significant Evolutionary Units within H. uniformis. Each of these taxa are distributed in different interfluvial / endemic areas of the Amazon basin. In particular, it confirms the status of full species for H. brigidai, endemic to the second area of Amazonian endemism with greater deforestation. Thus, we suggest the continued in-depth evaluation of its conservation status to promote its preservation.

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Old Thursday 15th November 2018, 20:16   #5
James Jobling
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Some suggested English names:
Hylexetastes perroti (de La Fresnaye, 1844), Red-billed Woodcreeper.
Hylexetastes uniformis Hellmayr, 1909, Uniform Woodcreeper.
Hylexetastes brigidai (Cardoso da Silva et al., 1995), Grey-lored Woodcreeper.
Hylexetastes stresemanni Snethlage, 1925, Bar-bellied Woodcreeper.
Hylexetastes undulatus Todd, 1925, Undulated Woodcreeper.
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Old Thursday 15th November 2018, 20:37   #6
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Can I suggest French names for my own checklist ?

Hylexetastes brigidai (Cardoso da Silva et al., 1995) – Grimpar de Brigida
Hylexetastes perroti (de La Fresnaye, 1844) – Grimpar de Perrot
Hylexetastes stresemanni Snethlage, 1925 – Grimpar de Stresemann
Hylexetastes undulatus Todd, 1925 – Grimpar ondulé (?)
Hylexetastes uniformis Hellmayr, 1909 – Grimpar uni
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Old Friday 16th November 2018, 08:18   #7
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Originally Posted by LeNomenclatoriste View Post
Can I suggest French names for my own checklist ?

Hylexetastes brigidai (Cardoso da Silva et al., 1995) – Grimpar de Brigida
...
Of course you can, anyone can suggest whatever name they feel like, for their "own checklist". It´s a free world!

In any case, I would spell the Common/Vernacular name "Grimpar de Santa-Brígida" for Hylexetastes brigidai (that is, if you don't like to follow, relate or translate James's suggested "Grey-lored Woodcreeper", of course), with the full Surname, as the name of the dedicatee seems to be written either as Manoel Santa‐Brígida or Manoel Santa Brígida (with or without hyphen?), however with accent (over the first i,= í ), see, for examples; here, here or here. The latter with a Photo of Manoel himself (together with his Son Nilton).

Looks like Mr Santa‐Brígida is "still going strong" ...

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Old Friday 16th November 2018, 13:41   #8
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If I understand it right the abstract in IBIS proposes either a split of H. perrotti into 2 species or alternatively a split into at least 3 species (a change from the thesis abstract). The reason for this more conservative approach is I assume that genetic data in the thesis for the brigidai/uniformis pair are not that convincing (see e.g. p40, p44 and p45 !).
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