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North American Alderflies |
| Order (Family Common Name) | Scientific Name (previously known as) |
| Megaloptera (Alderfly) | Sialis aequalis |
| Megaloptera (Alderfly) | Sialis americana |
| Megaloptera (Alderfly) | = (Protosialis americana) |
| Megaloptera (Alderfly) | = (Sialis ferrugineus) |
| Megaloptera (Alderfly) | Sialis arvalis |
| Megaloptera (Alderfly) | Sialis bilobata |
| Megaloptera (Alderfly) | Sialis californica |
| Megaloptera (Alderfly) | Sialis concava |
| Megaloptera (Alderfly) | Sialis contigua |
| Megaloptera (Alderfly) | Sialis cornuta |
| Megaloptera (Alderfly) | Sialis dreisbachi |
| Megaloptera (Alderfly) | Sialis glabella |
| Megaloptera (Alderfly) | Sialis hamata |
| Megaloptera (Alderfly) | Sialis hasta |
| Megaloptera (Alderfly) | Sialis infumata |
| Megaloptera (Alderfly) | Sialis iola |
| Megaloptera (Alderfly) | Sialis itasca |
| Megaloptera (Alderfly) | Sialis joppa |
| Megaloptera (Alderfly) | Sialis mohri |
| Megaloptera (Alderfly) | Sialis nevadensis |
| Megaloptera (Alderfly) | Sialis nina |
| Megaloptera (Alderfly) | Sialis occidens |
| Megaloptera (Alderfly) | Sialis rotunda |
| Megaloptera (Alderfly) | Sialis spangleri |
| Megaloptera (Alderfly) | Sialis vagans |
| Megaloptera (Alderfly) | Sialis velata |