Immature instars of three species of Rhodnius Stal, 1859 (Hemiptera, Reduviidae, Triatominae): morphology, morphometry, and taxonomic implications

Autor(es)

Lazari Cacini, Gustavo ; de Oliveira, Jader ; Belintani, Tiago ; dos Santos Souza, Eder ; Olaia, Nicoly ; Pinto, Mara Cristina ; da Rosa, Joao Aristeu

• Tipo de documento: Artigo Científico
• Fonte: PARASITES & VECTORS; v. 15, n. 1, p. 16-pg., 2022-03-18.

Resumo

Background: Among the 18 genera of the Triatominae subfamily, three stand out for their diversity and epidemiological importance: Triatoma, Panstrongylus, and Rhodnius. Rhodnius includes 21 species that can transmit Trypanosoma cruzi (the etiological agent of Chagas disease, also known as American trypanosomiasis) and Trypanosoma rangeli. The Rhodnius prolixus complex comprises seven species, including Rhodnius marabaensis, Rhodnius prolixus, and Rhodnius robustus, which occur in the northern region of Brazil. Since both adults and immatures can carry T. cruzi, in this study the five nymphal instars of the three species mentioned were dorsally characterized. Methods: Using microscopy, morphometrics, and geometric morphometrics, the present work measures and describes the morphological characters of the five nymphal instars of R. marabaensis, R. prolixus, and R. robustus. Results: The study enabled the characterization of all five nymphal instars, as well as the distinction between the three species in each of their instars. Conclusions: The morphological, morphometrics of the head, thorax, and abdomen and geometric morphometrics studies of the head enabled the specific distinction of these three species in all five instars. (AU)

• Processo FAPESP: 17/13674-0 - Caracterização morfométrica dos estádios ninfais de Rhodnius marabaensis Souza et al., 2016, R. prolixus Stål, 1859 e R. robustus Larrousse, 1927 (Hemiptera, Reduviidae, Triatominae)
• Beneficiário: Gustavo Lázari Cacini
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 17/06460-4 - Identificação fenotípica e estudo de transcriptoma de triatominae (hemiptera, reduviidae)
• Beneficiário: João Aristeu da Rosa
• Modalidade de apoio: Auxílio à Pesquisa - Regular