The 318–259 Ma Meganisoptera display is a sampled fossil-record envelope from Namurian B through at least the end of the Middle Permian, not an exact extinction interval.
claim:taxon:meganisoptera:fossil-rangeInduced Power Scaling Alone Cannot Explain Griffenfly Gigantism
Ellers, O.; Gordon, B.; Hukill, A.; et al.
Year2024
Source roleprimary-study
DOI / ID10.1093/icb/icae046
Fitness and scope
range · morphology · ecology
Functional study summarizes the reviewed first Namurian B record and persistence through at least the end of the Middle Permian; it does not supply an exact extinction date.