The metasternal and Brindley's Glands of Triatoma brasiliensis Neiva (Hemiptera: Reduviidae)

Vitta, Ana C. R.; Serrão, José Éduardo; Lima, Eraldo; Villela, Evaldo F

doi:10.1590/s1519-566x2009000200010

Cited by 7 publications

(3 citation statements)

References 19 publications

(27 reference statements)

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“…Reduviidae have glands that release compounds associated with defensive behavior, alarm, and mating (Weirauch 2003(Weirauch , 2004(Weirauch , 2006bVitta et al 2009). However, the current study is the Þrst record of a glandular epidermis associated with wax secretion in Reduviidae, which calls for further studies to explain the physiological or ecological functions of the wax released onto the body surface during speciÞc developmental stage of H. angulosus.…”

Section: Discussionmentioning

confidence: 99%

Epidermis Associated with Wax Secretion in theHarpactor angulosus(Hemiptera: Reduviidae)

Pikart

Souza

Ribeiro

et al. 2014

Annals of the Entomological Society of America

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Beginning at the third instar, the generalist predator Harpactor angulosus (Lepeletier & Serville) (Reduviidae: Harpactorinae) appears gray in color because of the presence of a whitish particulate wax-like material covering all body segments. In this study, we tested the hypothesis that epidermal cells are responsible for the secretion of the wax-like substance onto the cuticle of H. angulosus. The integument of third instar to the adults of H. angulosus have no external structures specialized in wax secretion, as the wax particles are deposited in a filamentous manner. Third to fourth instars and adult stages have a single-layered epidermis composed of columnar cells. In contrast, lack of wax deposit on the body surface of first and second instars is associated with flattened epidermal cells. The columnar epidermal cells are characterized by a well-developed nucleus, basal cell surface with large infoldings, and a cytoplasm rich in vacuoles. These vacuoles are negative for the presence of carbohydrates and proteins, but strongly positive for the presence of lipids. The structural features of the epidermis and the presence of lipid droplets suggest that lipid metabolism is active within the epidermis from the third instar to the adult of H. angulosus. This is the first record of a glandular epidermis associated with wax secretions in Reduviidae.

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Section: Discussionmentioning

confidence: 99%

Epidermis Associated with Wax Secretion in theHarpactor angulosus(Hemiptera: Reduviidae)

Pikart

Souza

Ribeiro

et al. 2014

Annals of the Entomological Society of America

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“…The chemical blends that compose sexual and aggregation pheromones have been characterized for several triatomine species [43][44][45]. As well, relevant host-emitted odorants have been identified [46].…”

Section: Perspectivesmentioning

confidence: 99%

Molecular bases of sensory processes in kissing bugs, vectors of Chagas disease

Latorre-Estivalis¹,

Lorenzo

2019

Current Opinion in Insect Science

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Sensory processes represent an information gathering interface between animals and their surrounding world. Therefore, they serve to scan the environment for resources and threats.The behavior of kissing bugs has been studied to aid their control because they transmit Chagas disease to humans. Besides, a few triatomines represent important insect models since Wigglesworth times. These hematophagous insects rely on different sensory systems to scan their environment for blood-sources, mating partners and hiding places. The study of the molecular bases of sensory processes has undergone a dramatic progress due the advent of new technologies allowing mass-sequencing of genes. Here we focus on reviewing the fundamental knowledge gathered to date about the molecular bases of kissing bug sensory processes. Highlights• Kissing bugs are hematophagous insects that act as vectors of human disease;• The detection of multimodal sensory inputs related to host, shelter and sexual partner relies on receptor proteins belonging to diverse gene families;• Genome sequences have been characterized and sensory gene families described;• Targeted genes code mostly for olfactory, taste, thermo and hygro-receptors.

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“…They are ventrally located at the anterior margin of each metacoxal cavity [41]. Each gland consists of an unbranched secretory tubule and a small pear-shaped reservoir opening laterally to the sternal apophyseal pit [42,43]. The sac-like paired Brindley's glands are dorsally located, extending into the lateral portion of the second abdominal segment and opening onto the metathoracic epimeron [39,41,44,45].…”

Section: The Role Of Triatomine Exocrine Gland Secretionsmentioning

confidence: 99%

The Sexual Behaviour of Chagas' Disease Vectors: Chemical Signals Mediating Communication between Male and Female Triatomine Bugs

Manrique

Lorenzo

2012

Psyche: A Journal of Entomology

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Chemical communication mechanisms that mediate sexual behaviour in triatomine bugs are reviewed with regard to source, identity, and function of sex pheromones. Males attempt to copulate but may be rejected, depending on female age and nutritional status. Triatomine males locate partners through sex pheromones emitted by the metasternal glands (MGs) of females. These activate males, inducing them to leave their refuges and initiate flight. Wandering males display anemotactic orientation modulated by chemical signals emitted from female MGs. Analyses of the MG secretions of several species resulted in the identification of numerous ketones, acetals, and alcohols. Occlusion experiments showed that Brindley's gland products were not required for mating. Metasternal gland volatiles are emitted by virgin male and female bugs, with detection over females occurring more consistently, especially during the early scotophase, suggesting female calling behaviour. Mating triatomine females have been reported to attract males that tend to copulate successively with them. Mating males prolong mating and postcopulatory mate guarding in the presence of other males. This is indicative of a polyandrous mating system in several triatomine species. Its potential advantages remain unknown, and comparative studies are required to increase our understanding of triatomine reproductive strategies.

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The metasternal and Brindley's Glands of Triatoma brasiliensis Neiva (Hemiptera: Reduviidae)

Cited by 7 publications

References 19 publications

Epidermis Associated with Wax Secretion in theHarpactor angulosus(Hemiptera: Reduviidae)

Epidermis Associated with Wax Secretion in theHarpactor angulosus(Hemiptera: Reduviidae)

Molecular bases of sensory processes in kissing bugs, vectors of Chagas disease

The Sexual Behaviour of Chagas' Disease Vectors: Chemical Signals Mediating Communication between Male and Female Triatomine Bugs

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