Ecological niche and geographic distribution of the Chagas disease vector, Triatoma dimidiata (Reduviidae: Triatominae): Evidence for niche differentiation among cryptic species

Gómez-Palacio, Andrés; Arboleda, Sair; Dumonteil, Eric; Peterson, A. Townsend

doi:10.1016/j.meegid.2015.08.035

Cited by 34 publications

(28 citation statements)

References 44 publications

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“…One possible mechanism driving the evolution of the T. dimidiata species complex may be ecological niche divergence (Gómez-Palacio et al, 2015). Indeed, our finding of the divergent taxon in a single cave system in Belize supports this hypothesis (although more extensive sampling is necessary to confirm this), and other cave populations are monophyletic with T. dimidiata s.s. Work has just begun on understanding the environmental and geological forces that have separated the Triatominae (Justi et al, 2016) and specifically T. dimidiata taxa (Gómez-Palacio et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

“…Indeed, our finding of the divergent taxon in a single cave system in Belize supports this hypothesis (although more extensive sampling is necessary to confirm this), and other cave populations are monophyletic with T. dimidiata s.s. Work has just begun on understanding the environmental and geological forces that have separated the Triatominae (Justi et al, 2016) and specifically T. dimidiata taxa (Gómez-Palacio et al, 2015). Clarity of how many taxa are under the T. dimidiata umbrella will facilitate these studies.…”

Section: Discussionmentioning

confidence: 99%

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Hypothesis testing clarifies the systematics of the main Central American Chagas disease vector, Triatoma dimidiata (Latreille, 1811), across its geographic range

Dorn

Rúa

Axen

et al. 2016

Infection, Genetics and Evolution

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The widespread and diverse Triatoma dimidiata is the kissing bug species most important for Chagas disease transmission in Central America and a secondary vector in Mexico and northern South America. Its diversity may contribute to different Chagas disease prevalence in different localities and has led to conflicting systematic hypotheses describing various populations as subspecies or cryptic species. To resolve these conflicting hypotheses, we sequenced a nuclear (internal transcribed spacer 2, ITS-2) and mitochondrial gene (cytochrome b) from an extensive sampling of T. dimidiata across its geographic range. We evaluated the congruence of ITS-2 and cyt b phylogenies and tested the support for the previously proposed subspecies (inferred from ITS-2) by: (1) overlaying the ITS-2 subspecies assignments on a cyt b tree and, (2) assessing the statistical support for a cyt b topology constrained by the subspecies hypothesis. Unconstrained phylogenies inferred from ITS-2 and cyt b are congruent and reveal three clades including two putative cryptic species in addition to T. dimidiata sensu stricto. Neither the cyt b phylogeny nor hypothesis testing support the proposed subspecies inferred from ITS-2. Additionally, the two cryptic species are supported by phylogenies inferred from mitochondrially-encoded genes cytochrome c oxidase I and NADH dehydrogenase 4. In summary, our results reveal two cryptic species. Phylogenetic relationships indicate T. dimidiata sensu stricto is not subdivided into monophyletic clades consistent with subspecies. Based on increased support by hypothesis testing, we propose an updated systematic hypothesis for T. dimidiata based on extensive taxon sampling and analysis of both mitochondrial and nuclear genes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Hypothesis testing clarifies the systematics of the main Central American Chagas disease vector, Triatoma dimidiata (Latreille, 1811), across its geographic range

Dorn

Rúa

Axen

et al. 2016

Infection, Genetics and Evolution

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“…Although this research was focused on evaluating the possibility of correctly discriminating three haplogroups of T. dimidiata using the dorsal spot pattern, the value of coloration patterns in species biology cannot be forgotten. Color in insects has important biological functions including mate choice, intra-sexual competition, dominance relationships, and other social interactions [52]. Therefore, its study is relevant in many contexts beyond taxonomy, and research should be increased to explore the role that coloration patterns play in nature.…”

Section: Discussionmentioning

confidence: 99%

“…In relation to other groups of insects such as Coleoptera, Lepidoptera and Hymenoptera, in Hemiptera and especially the Triatominae subfamily, there are very few studies associated with the coloring patterns. [52].…”

Section: Discussionmentioning

confidence: 99%

Quantitative Imagery Analysis of Spot Patterns for Haplogroup Classification of Triatoma Dimidiata (Latreille, 1811) (Hemiptera: Reduviidae) an Important Vector of Chagas Disease

Flores

Denis

Arellano

et al. 2020

Preprint

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Background: Spots and coloring patterns evaluated quantitatively can be used to discrimination and identify possible cryptic species. Triatoma dimidiata (Reduviidae: Triatominae) is one of the main complexes of Chagas disease vector species. Phylogenetic studies have defined three haplogroups for Mexico and part of Central America. In this work, we evaluate the possibility of correctly discriminating among these T. dimidiata haplogroups using the pattern of dorsal spots.Results: A distinctive spot pattern was found for each haplogroup. The most differentiated pattern was presented by haplogroup 2, mainly apparent in the notably larger central spots. Haplogroups 1 and 3 were more similar to each other, but there were consistent differences in the shape and orientation of the spots. Significant differences were found among haplogroups in almost all the variables analyzed, these differences being greater in relative spot area, mean relative area of central spots, central spots Feret diameters, lateral spots Feret diameters and aspect ratio. Both the DFA and the neural network had correct discrimination values above 90%. Conclusions: We conclude that the spot pattern can be reliably used to discriminate among haplogroups, and possibly among triatomine species.

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“…It is worth noting that all of the T. dimidiata specimens analyzed in this study were collected in Colombia, where a remarkable genetic diversity and an extensive population sub-structure had been reported , and where all of the populations were classified as belonging to dimidiata group I (Gómez-Palacio et al, 2015;Gómez-Palacio and Triana, 2014), which has been suggested as a new cryptic species . Given these results, we propose that the EF-1α gene could be used to support genetic divergence among dimidiata complex species, as well as to access a more suitable Table 3.…”

Section: Description Of Ef-1α In Triatominaementioning

confidence: 95%

The nuclear elongation factor-1α gene: a promising marker for phylogenetic studies of Triatominae (Hemiptera: Reduviidae)

Díaz

Triana-Chávez

Gómez-Palacio

2016

Infection, Genetics and Evolution

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Ecological niche and geographic distribution of the Chagas disease vector, Triatoma dimidiata (Reduviidae: Triatominae): Evidence for niche differentiation among cryptic species

Cited by 34 publications

References 44 publications

Hypothesis testing clarifies the systematics of the main Central American Chagas disease vector, Triatoma dimidiata (Latreille, 1811), across its geographic range

Hypothesis testing clarifies the systematics of the main Central American Chagas disease vector, Triatoma dimidiata (Latreille, 1811), across its geographic range

Quantitative Imagery Analysis of Spot Patterns for Haplogroup Classification of Triatoma Dimidiata (Latreille, 1811) (Hemiptera: Reduviidae) an Important Vector of Chagas Disease

The nuclear elongation factor-1α gene: a promising marker for phylogenetic studies of Triatominae (Hemiptera: Reduviidae)

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