Triatoma carcavalloi is considered a rare Chagas disease vector often collected inside domiciles in Rio Grande do Sul State. In this Brazilian state, T. carcavalloi has been collected in the same ecotope (rock piles) with two other species (T. rubrovaria and T. circummaculata), with which it also shares morphological characteristics. Previous morphological studies placed T. carcavalloi in the same species complex ("infestans complex") and subcomplex ("rubrovaria subcomplex") as T. rubrovaria, whereas T. circummaculata was placed in the "circummaculata complex." The phylogeny of a group composed of 16 species of triatomines was reevaluated with the inclusion of T. carcavalloi by Bayesian analysis using mtDNA sequences of subunits 12S and 16S of the ribosomal RNA, and the cytochrome oxidase I (COI) genes. The phenotypic relationship among T. carcavalloi and related triatomines was also inferred from morphometrics. Phylogenetic results indicate that T. carcavalloi is a sister species of T. rubrovaria, and both were recovered as closely related to T. circummaculata. Morphometric studies confirmed the closeness among T. carcavalloi, T. rubrovaria, and T. circummaculata, prompting the placement of the latter species in the "infestans complex" and "rubrovaria subcomplex."
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Integrative taxonomy and phylogenetic systematics of the Triatoma rubrovaria subcomplex (Hemiptera, Triatominae).
Acta Trop
January 2023
São Paulo State University (Unesp), School of Pharmaceutical Sciences, Araraquara, SP, Brazil. Electronic address:
Article Synopsis
- The Triatoma rubrovaria subcomplex includes several species that can transmit Trypanosoma cruzi, which causes Chagas disease.
- The study analyzed the morphology, morphometric details, and genetic data of five species to understand their taxonomy and evolutionary relationships.
- Findings revealed distinct morphological traits among the species, confirmed their monophyletic grouping, and supported the classification of these as important vectors in Southern Brazil.
Characterization of the Buccula, Rostrum, Stridulatory Sulcus, Scutellum, and External Female Genitalia of (Jurberg, Rocha & Lent, 1998), (Stål, 1859), and (Blanchard, 1843) (Hemiptera, Reduviidae, Triatominae).
J Parasitol Res
July 2019
Laboratório Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Pavilhão Carlos Chagas, 5° Andar, Rio de Janeiro, RJ 21040-360, Brazil.
In Brazil, (Blanchard, 1843) is the most important species in epidemiological terms in the State of Rio Grande do Sul, due to its wide geographical distribution in this state, followed by (Jurberg, Rocha & Lent, 1998) and (Stål, 1859). Structural analysis of the ventral region of the head (rostrum and buccula), thorax (stridulatorium sulcus and scutellum), and external female genitalia of adults of , , and is described here. Scutellum, head, rostrum, and part of the thorax (prosternum) containing the stridulatory sulcus, in both male and female, and the sixth abdominal segment of the female, containing the external genitalia, were processed for scanning electron microscopy studies as routine.
View Article and Find Full Text PDFMorphological study of the urotergite I process in ten species of the genus Triatoma (Hemiptera, Reduviidae, Triatominae).
Acta Trop
April 2019
Laboratory of Entomology in Public Health, Department of Epidemiology, School of Public Health, University of São Paulo, Av. Dr. Arnaldo, 715, Pinheiros, São Paulo, São Paulo, CEP 01246-904, Brazil.
The insects of subfamily Triatominae exhibit many morphological features used for taxonomic identification. In some species, however, these features are very similar. The authors have proposed by first time the description of the structure referred as urotergite I process.
View Article and Find Full Text PDFMitochondrial Gene Confirms the Specific Status of Triatoma pintodiasi Jurberg, Cunha, and Rocha, 2013 (Hemiptera, Triatominae), an Endemic Species in Brazil.
Am J Trop Med Hyg
January 2017
Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho"-São José do Rio Preto, São Paulo, Brazil.
Chagas disease is most frequently transmitted to humans through contact with feces of insects from the Triatominae subfamily. In Brazil, there are 65 species of triatomines distributed throughout the country's 27 states. Among the species in the state of Rio Grande do Sul, Triatoma rubrovaria, Triatoma oliveirai, Triatoma pintodiasi, Triatoma klugi, Triatoma carcavalloi, and Triatoma circummaculata (with the addition Triatoma limai, which is endemic to Argentina) form the T.
View Article and Find Full Text PDFDescription of the diploid chromosome set of Triatoma pintodiasi (Hemiptera, Triatominae).
Genet Mol Res
April 2016
Laboratório de Biologia Celular, Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas.
Triatoma pintodiasi has been described and recently grouped in the Rubrovaria subcomplex. T. pintodiasi was initially compared to T.
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