Flat-headed Mayfly vs Embossed Stonefly
Side-by-side species comparison
| Attribute | Flat-headed Mayfly | Embossed Stonefly |
|---|---|---|
| Scientific Name | Epeorus assimilis | Paragnetina immarginata |
| Order | Ephemeroptera | Plecoptera |
| Family | Heptageniidae | Perlidae |
| Size | 10-14 mm | 18-25 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Herbivores | Predators |
| Regions | Europe | North America |
| Conservation | Least Concern | Least Concern |
Flat-headed Mayfly
A stream-dwelling mayfly nymph with a flattened body for clinging to rocks in rapids.
Did You Know?
Its flattened nymph shape allows it to live in the boundary layer of fast currents.
Embossed Stonefly
A large patterned stonefly of clean eastern streams with raised body markings. Nymphs are top predators among stream cobble invertebrate communities.
Did You Know?
Nymphs moult up to 30 times before reaching adulthood, far more than most aquatic insects.