New in morphometry: Geometric morphometry of the external female genitalia of Triatominae (Hemiptera: Reduviidae)

Belintani, Tiago; Paiva, Vinícius Fernandes de; Oliveira, Jader de; Rosa, João Aristeu da

doi:10.1016/j.actatropica.2022.106383

Cited by 4 publications

(15 citation statements)

References 51 publications

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“…The set of recorded characteristics corroborates the important taxonomic value of these characters to differentiate Triatoma species [ 13 , 14 , 26 ]. In the posterior view, the appendices characters are confusingly detailed in Rodrigues et al [ 13 ], as the authors did not detail the criteria between “present and visible” or “not visible”, leading the character to be observed in a non-comprehensive way.…”

Section: Discussionsupporting

confidence: 71%

“…Within complexes, characteristics commonly used to distinguish Triatoma species include the color patterns of the connexivum, pronotum, and legs and the morphological features of the head, pronotum, and female and male genitalia [ 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have compared terminal segments of the abdomen of females belonging to the Triatomini and Rhodniini tribes based on scanning electron microscopy (SEM) images and highlighted diagnostic characters at the species level [ 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. Currently, there are 47 species of Triatoma with described female genitalia [ 3 , 13 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

“…According to Rodrigues et al [ 13 ], the female genitalia present a useful set of characters for the specific identification of Triatominae. Subsequently, Belintani et al [ 14 ] highlighted, through morphometric analysis, that the female genitalia have conformations that allow the differentiation of the species and genera Panstrongylus Berg, Psammolestes Bergroth, Rhodnius Stål, and Triatoma . However, exclusive morphological characters have not yet been observed in the female genitalia that allow differentiating Triatoma from another genus [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

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Characterization of External Female Genitalia in Five Triatoma Laporte Species of South America (Hemiptera: Reduviidae: Triatominae)

et al. 2023

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Currently, there are 158 valid species of triatomines, all of which are potential vectors of Trypanosoma cruzi, the etiological agent of Chagas disease. The correct taxonomic identification of triatomines is essential since each species hos a different epidemiological importance. The aim of the study is to compare five species of South American Triatoma. Here we present a comparative study of terminal abdominal segments in females by scanning electron microscopy (SEM) of the species Triatoma delpontei, T. jurbergi, T. infestans var. melanosoma, T. platensis, and T. vandae. The results showed diagnostic characters for the studied species. The dorsal view featured more valuable characters, with seven informative characters. Similarities were observed among T. delpontei, T. infestans var. melanosoma, and T. platensis, and between T. jurbergi and T. vandae, correlating with previous studies. Thus, female genital characters proved to be reliable and useful in the diagnosis of the Triatoma species studied here; additional studies, along with other sets of behavioral, morphological, and molecular data, helped to reinforce the hypotheses found here.

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Section: Discussionsupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterization of External Female Genitalia in Five Triatoma Laporte Species of South America (Hemiptera: Reduviidae: Triatominae)

et al. 2023

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“…Eight reference points were selected for the generated matrix (Figure 2). The landmarks were selected as in Oliveira et al (2017) [16], collected and processed with the TPS package utilities: TPSdig 2.3.2 and TPSutil 1.81 [17,18]. The reference landmarks of all populations were collected three times, seeking to minimize collector effects [17,18].…”

Section: Obtention Of Images and Landmarksmentioning

confidence: 99%

Characterization of Triatoma infestans (Klug, 1834) (Hemiptera: Heteroptera, Reduviidae) from Residual Foci in the States of Bahia and Rio Grande do Sul, Brazil, Using Geometric Morphology

Peixoto¹,

Belintani

Rocha³

et al. 2023

Insects

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Triatoma infestans is one of the main vectors of Chagas disease in Latin America. Although the species is under control in most Latin countries, it is still necessary to maintain epidemiological surveillance. The present study aims to characterize T. infestans populations from residual foci in Bahia and Rio Grande do Sul, Brazil, comparing them with natural populations in Argentina and Bolivia. For this, we adopt the geometric morphometry of the heads. It is possible to report the morphometric variety of the studied populations. In addition, we show that the size of the heads contributes to the differentiation between populations, while the shape has less power to discriminate groups. Furthermore, we show that some natural populations have morphometric proximity to residual populations, suggesting a relationship between these triatomines. Our data do not support the origin of residual populations but demonstrate the importance of new studies with other techniques to understand the dynamics of distribution and reintroduction of these vectors in Brazilian territory.

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Analysis of the maternal inheritance hypothesis of the exochorium in eggs from hybrids of Chagas disease vectors

de Sousa,

de Oliveira,

Ravazi

et al. 2024

Sci Rep

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Morphological studies applied to the taxonomy of the Triatominae cover various structures (head, wing, thorax, genitalia, and eggs). Exochorial structures of hybrid eggs were characterized and compared with the parents, demonstrating that hybrids presented characteristics identical to the exochorial pattern observed in the females of the crosses, which resulted in the hypothesis that the pattern of triatomine eggs is possibly a characteristic inherited from females. Thus, we characterized the exochorium of the eggs of several triatomine hybrids and compared them with the parents, to assess the pattern of segregation and test the hypothesis of maternal inheritance. Hybrids were obtained in at least one direction from all crosses. The analysis of the exochorium of the eggs of the hybrids showed different patterns of segregation: "exclusively paternal", "predominantly maternal", "predominantly paternal", "mutual", and "differential". Curiously, none of the hybrids evaluated presented characteristics that segregated exclusively from the female parental species. Thus, we demonstrate that the hypothesis of maternal inheritance of the exochorium pattern of eggs is not valid and we emphasize the importance of alternative/combined tools (such as integrative taxonomy) for the correct identification of these insect vectors (mainly in view of possible natural hybridization events due to climate and environmental changes).

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New in morphometry: Geometric morphometry of the external female genitalia of Triatominae (Hemiptera: Reduviidae)

Cited by 4 publications

References 51 publications

Characterization of External Female Genitalia in Five Triatoma Laporte Species of South America (Hemiptera: Reduviidae: Triatominae)

Characterization of External Female Genitalia in Five Triatoma Laporte Species of South America (Hemiptera: Reduviidae: Triatominae)

Characterization of Triatoma infestans (Klug, 1834) (Hemiptera: Heteroptera, Reduviidae) from Residual Foci in the States of Bahia and Rio Grande do Sul, Brazil, Using Geometric Morphology

Analysis of the maternal inheritance hypothesis of the exochorium in eggs from hybrids of Chagas disease vectors

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