- adults- vestigial-adults don't feed
- naiads - chewing mouthparts (they are predacious or herbivores)
two pair; front wings triangular and much larger; wings with many veins; wings flap (an inefficient pattern) so they have limited flight; they cannot fold their wings so held vertically when at rest.
hemimetabolus with a unique subadult (=subimago); a winged adult emerges from water, climbs on vegetation and then molts to adult stage.
- wings of adults
- 2 or 3 terminal tails on abdomen.
- Long legs; body thin and elongate.
- abdominal gills and 3 feathery gills at end of abdomen.
naiads in fresh water and adults very close to water
important in aquatic food chain (favorite model for fly fisherman); can use species distribution patterns to monitor environmental degradation; heavy adult emergence may make walking/driving near water hazardous due to "slippery" wings
2250 species worldwide but tropical and oriental fauna not well studied. Many fossils as once more common.
Peters pg. 405; metamorphosis 106-107; flight 78-79
Links to other Ephemeroptera Sites