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Biomechanical and Aerodynamic Bounds of Carboniferous Meganeura Flight
Reconstructing the flight capabilities of extinct giant insects represents one of the most intriguing frontiers in functional morphology, yet paleobiological inferences require careful epistemic hedging. Preserved within Late Carboniferous strata from Commentry, France, fossil specimens of Meganeura monyi reveal predatory griffinflies possessing wingspans reaching seventy centimeters. For over a century, evolutionary biologists have hypothesized that this extraordinary gigantism was facilitated by late Paleozoic atmospheric hyperoxia, during which ambient oxygen levels are estimated to have reached approximately thirty-five percent. In theory, elevated oxygen partial pressure would enhance passive tracheolar gas diffusion, enabling massive thoracic flight muscles to meet high metabolic demands. However, modern biomechanists tend to caution that scaling contemporary insect physiology to giant prehistoric taxa involves substantial theoretical extrapolation.
Aerodynamic modeling indicates that Meganeura operated under Reynolds number regimes vastly different from modern dragonflies.