Cercyon obsoletus
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Coleoptera
- family: Hydrophilidae
- genus: Cercyon
- species: Cercyon obsoletus
Fjärås kyrkby- Särö
Halland- Bårslöv
- Gantofta
- Ljunghusen
Skåne- Marieberg
Uppsala- Majorna
Västra Götaland
Sweden
Houston- Kilbarchan
Scotland- Burry Port
- Llanrwst
- Trimsaran
- Wrexham
Wales
United Kingdom