When it is recorded
Jan0
Feb1
Mar16
Apr26
May16
Jun12
Jul20
Aug25
Sep52
Oct40
Nov19
Dec3
GBIF records by month, 2000–2025 (all years combined).
Where it is recorded
| # | County | Nation | Records | Share |
|---|---|---|---|---|
| 1 | North Yorkshire | England | 43 | |
| 2 | Nottinghamshire | England | 16 | |
| 3 | Lincolnshire | England | 11 | |
| 4 | Powys | Wales | 10 | |
| 5 | East Riding of Yorkshire | England | 5 | |
| 6 | Gloucestershire | England | 4 | |
| 7 | Dumfries and Galloway | Scotland | 4 | |
| 8 | Monmouthshire | Wales | 4 | |
| 9 | Denbighshire | Wales | 3 | |
| 10 | Cumbria | England | 2 | |
| 11 | Rutland | England | 2 | |
| 12 | Argyll and Bute | Scotland | 2 | |
| 13 | Scottish Borders | Scotland | 2 | |
| 14 | Herefordshire, County of | England | 2 | |
| 15 | East Ayrshire | Scotland | 2 |
182 England13 Scotland27 Wales
Records per county (GADM level 2) and per nation; one record can count towards several areas. 19 counties in all.
About this species
- Records since 2000
- 230
- Peak month
- September
- Counties with records
- 19
- Group
- Beetles
- NBN Atlas records since 2000
- 226
- Conservation designations
- Rare and scarce (non-IUCN status)
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Coleoptera
- Family
- Elmidae
- Genus
- Riolus
- Name with authority
- Riolus subviolaceus (Müller, 1817)
- Described
- 1817
Sources: GBIF occurrence data (CC0 / CC BY), JNCC Taxon Designations (OGL), NBN Atlas (open licences), Wikidata (CC0) · Wikidata Q2280955 · GBIF 4427749