Riffle Beetle vs Silvestri's Acerentomid
Side-by-side species comparison
| Attribute | Riffle Beetle | Silvestri's Acerentomid |
|---|---|---|
| Scientific Name | Elmis aenea | Acerentomon affine |
| Order | Coleoptera | Protura |
| Family | Elmidae | Acerentomidae |
| Size | 1.5-2.5 mm | 0.7-1.2 mm |
| Habitat | Rivers & Streams | Forests |
| Diet | Detritivores | Detritivores |
| Regions | Europe | Europe |
| Conservation | Least Concern | Not Evaluated |
Riffle Beetle
A tiny, dark beetle that spends its entire adult life underwater clinging to rocks in riffles. It breathes using a plastron, a permanent thin film of air.
Did You Know?
Its plastron air film never needs replenishing, allowing it to remain permanently submerged.
Silvestri's Acerentomid
A minute proturan found across central European forest soils. It is among the earliest described proturan species.
Did You Know?
Proturans undergo a unique developmental process called anamorphosis where body segments are added after hatching.