Morphological and mechanical characterisation of the hindwing nodus from the Libellulidae family of dragonfly (Indonesia)

The first amber stenophlebiid damsel-dragonfly (Odonata, Epiproctophora, Stenophlebiidae) from mid-Cretaceous amber of northern Myanmar

“…In particular, the subnodus of Burmastenophlebia is enforced by a dorsal chitinous bracket and the nodal furrow is very weak, suggesting that the stenophlebiid nodal complex is very particular and did not functioned as in other Odonata. Possibly the nodus of Burmastenophlebia could not be bent as in modern Libellulidae (Fauziyah et al, 2014), and the nodal Cr and subnodus had a more important function in the strengthening of the whole nodal complex than in other Odonata.…”

A Review of Natural Joint Systems and Numerical Investigation of Bio-Inspired GFRP-to-Steel Joints

“…According to Fauziyah et al [138,139], dragonfly wings are structurally stable due to their venous framework, which form joints at vein-to-vein cross-over points. These cross joints can contribute to arrest cracks that might occur at the thin membranous films, typically along the longitudinal axis of the wing [140].…”

“…The main purpose of resilin is to absorb and store mechanical energy, providing elasticity to the system [144]. From species-to-species, venous patterns are varied and from joint-to joint-the resilin is distributed in different geometrical arrangements and volumes and across the span of the wing [138]. …”

Morphological Study of the Sympetrum arenicolor Jödicke, 1994 (Odonata: Libellulidae) Collected in Kurdistan Région-Iraq

“…(Figure 6a, 6b): Wings long, narrow, translucent, membranous, anal triangle of the hind wing elongated, one celled, pale brown colored, membranule of the hind wing absent, each wing with long, narrow rectangular, brown, pterostigma, its anterior and posterior margins thickened but its short sides are thin, occupied one cell, arculus fused in the beginning as one vein in both wings, costal vein pale brown, with two edges, ornamented by a row of very short brown spines, nodus brown colored, nearly located at the midway between the base and the outer angle of the wings, with Hierarchical composite structures, Fauziyah et al [27] indicate that there was variation of the node between species ,this variability is related to the size of the dragonfly and its wing. We can note that the area fractions and perimetral values of resilin (for individual dragonflies) are always higher on the ventral face of the nodus than on the dorsal face, regardless of species.…”