Riolus cupreus
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Coleoptera
- family: Elmidae
- genus: Riolus
- species: Riolus cupreus
Hainfeld
Lunz am See
Ybbsitz
Lower AustriaGösting
Sankt Blasen
Sankt Lambrecht
StyriaGrünburg
Linz
Waldneukirchen
Upper Austria
AustriaBrakel
Langenberg
North Rhine-Westphalia
GermanyKlippan
Köpingebro
Ljungbyhed
SkåneHerrljunga
Åkarp
Västra Götaland
SwedenLanark
Scotland
United Kingdom