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Background <p>A new triatomine species was discovered in the semiarid Caatinga region of Rio Grande do Norte, Brazil, where it coexists with <i>Triatoma brasiliensis</i> in both natural and artificial habitats.</p> Methods <p>Triatomine specimens were captured in peridomestic and sylvatic environments in Rio Grande do Norte. Their identification was based on a combination of analyses, including morphology using dichotomous keys, head and hemelytron morphometry, and phylogeny using cytochrome b and internal transcribed spacer markers.</p> Results <p>The new species exhibits morphological traits that are intermediate between those of <i>Triatoma brasiliensis</i> and <i>Triatoma petrocchiae</i>, but has distinct characteristics, leading to its designation as <i>Triatoma chiarii</i> sp. nov. Geometric morphometric analysis of its wings and head clearly distinguished <i>T. chiarii</i> sp. nov. from <i>T. brasiliensis</i> and <i>T. petrocchiae</i>, while phylogenetic reconstruction confirmed its placement within the <i>T. brasiliensis</i> species complex. Both approaches consistently supported <i>T. chiarii</i> sp. nov. as a species closely related to <i>T. petrocchiae</i>, but with sufficient phenotypic and genotypic divergence to warrant its recognition as a new taxonomic entity.</p> Conclusions <p>Since <i>T. chiarii</i> sp. nov. was also found in the peridomestic environment, its possible role in the eco-epidemiology of Chagas disease warrants further investigation.</p>

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Triatoma chiarii sp. nov. (Hemiptera, Reduviidae, Triatominae): a new species in the Triatoma brasiliensis complex from Rio Grande do Norte state, Brazil

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  • 发表日期：

    2025年12月1日

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  • Andressa Noronha Barbosa-Silva,
  • Nathan Ravi Medeiros Honorato,
  • Rita de Cássia Moreira de Souza,
  • Carolina Dale,
  • João Luís Reis Cunha,
  • Carlos Eduardo Almeida,
  • Samuel Alexandre Pimenta Carvalho,
  • Ana Carolina Passos,
  • Flávio Campos Ferreira,
  • Paulo Marcos da Matta Guedes,
  • Daniela Maeda Takiya,
  • Liléia Gonçalves Diotaiuti,
  • Daniella Castanheira Bartholomeu,
  • Carlos Ramon do Nascimento Brito,
  • Antonia Claudia Jácome da Câmara,
  • Lúcia Maria da Cunha Galvão

摘要

Background

A new triatomine species was discovered in the semiarid Caatinga region of Rio Grande do Norte, Brazil, where it coexists with Triatoma brasiliensis in both natural and artificial habitats.

Methods

Triatomine specimens were captured in peridomestic and sylvatic environments in Rio Grande do Norte. Their identification was based on a combination of analyses, including morphology using dichotomous keys, head and hemelytron morphometry, and phylogeny using cytochrome b and internal transcribed spacer markers.

Results

The new species exhibits morphological traits that are intermediate between those of Triatoma brasiliensis and Triatoma petrocchiae, but has distinct characteristics, leading to its designation as Triatoma chiarii sp. nov. Geometric morphometric analysis of its wings and head clearly distinguished T. chiarii sp. nov. from T. brasiliensis and T. petrocchiae, while phylogenetic reconstruction confirmed its placement within the T. brasiliensis species complex. Both approaches consistently supported T. chiarii sp. nov. as a species closely related to T. petrocchiae, but with sufficient phenotypic and genotypic divergence to warrant its recognition as a new taxonomic entity.

Conclusions

Since T. chiarii sp. nov. was also found in the peridomestic environment, its possible role in the eco-epidemiology of Chagas disease warrants further investigation.