Riolus cupreus
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Coleoptera
- family: Elmidae
- genus: Riolus
- species: Riolus cupreus
Hainfeld
Lunz am See
Ybbsitz
Lower Austria
Gösting
Sankt Blasen
Sankt Lambrecht
Styria
Grünburg
Linz
Waldneukirchen
Upper Austria
Austria
Brakel
Langenberg
North Rhine-Westphalia
Germany
Klippan
Köpingebro
Ljungbyhed
Skåne
Herrljunga
Åkarp
Västra Götaland
Sweden
Lanark
Scotland
United Kingdom
Bolzano