| Megasecoptera Temporal range:
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| Adult of Mischoptera nigra (a) and reconstructions of early (b) and late (c) larvae of Mischoptera douglassi | |
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| Restoration of Corydaloides scudderi | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Superorder: | †Palaeodictyopteroidea |
| Order: | †Megasecoptera Brongniart, 1885 |
Megasecoptera is a Paleozoic insect order. There are 22 known families of megasecopterans, with about 35 known genera.