Morphology of hindwing veins in the shield bug Graphosoma italicum (Heteroptera: Pentatomidae).
Arthropod Struct Dev
; 47(4): 375-390, 2018 Jul.
Article
em En
| MEDLINE
| ID: mdl-29684555
ABSTRACT
Light, fluorescence, and electron microscopy were applied to cross sections and -breakage and whole-mount preparations of the anterior hindwing vein of the shield bug Graphosoma italicum. These analyses were complemented by investigations of the basal part of the forewing Corium and Clavus. The integration of structural, histological, and fluorescence data revealed a complex arrangement of both rigid and elastic structures in the wall of wing veins and provided insights into the constitution of transition zones between rigid and elastic regions. Beneath the exocuticular layers, which are continuous with the dorsal and ventral cuticle of the wing membrane, the lumen of the veins is encompassed by a mesocuticular layer, an internal circular exocuticular layer, and an internal longitudinal endocuticular layer. Separate parallel lumina within the anterior longitudinal vein of the hindwing, arranged side-by-side rostro-caudally, suggest that several veins have fused in the phylogenetic context of vein reduction in the pentatomid hindwing. Gradual structural transition zones and resilin enrichment between sclerotized layers of the vein wall and along the edges of the claval furrow are interpreted as mechanical adaptations to enhance the reliability and durability of the mechanically stressed wing veins.
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Base de dados:
MEDLINE
Assunto principal:
Asas de Animais
/
Heterópteros
Limite:
Animals
Idioma:
En
Revista:
Arthropod Struct Dev
Ano de publicação:
2018
Tipo de documento:
Article