Cercyon convexiusculus
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Coleoptera
- family: Hydrophilidae
- genus: Cercyon
- species: Cercyon convexiusculus
Neusiedl am See- Nickelsdorf
- Weiden am See
- Zurndorf
Burgenland- Brunn am Gebirge
- Gaaden
- Herzogenburg
- Maria Enzersdorf
- Mödling
- Wiener Neudorf
Lower Austria
Austria
Newmarket on Fergus
Munster
Ireland
Aldbrough- Arborfield
- Ash
- Ashley
- Askern
- Awsworth
- Babworth
- Barlborough
- Barrow upon Soar
- Bawtry
- Berrington
- Bircotes
- Bishops Stortford
- Blackheath
- Bodle Street
- Bolsover
- Borrowash
- Briston
- Brooke
- Broomfleet
- Broxbourne
- Burley
- Camblesforth
- Canterbury
- Castle Donington
- Castor
- Catcliffe
- Chapel Saint Leonards
- Chesterfield
- Chigwell
- Chorleywood
- Cleveleys
- Coltishall
- Congresbury
- Copmanthorpe
- Cotgrave
- Crofton
- Cropwell Bishop
- Croston
- Crowle
- Cuddington
- Darlington
- Donisthorpe
- East Harling
- East Leake
- Eastrington
- Egham
- Ellerton
- Elm Park
- Enderby
- Eye
- Farndon
- Fimber
- Flamborough
- Frimley
- Great Bookham
- Greetham
- Griston
- Guilden Sutton
- Halsham
- Harpenden
- Hathern
- Haxby
- Heanor
- Helmsley
- Helpston
- Hertford
- Heslington
- High Halstow
- Hoddesdon
- Holmpton
- Holtby
- Hoole
- Hornsea
- Howden
- Hucknall
- Huntington
- Ilkeston
- Kegworth
- Keyingham
- Kidlington
- Kilpin
- Kimberley
- Kingsley
- Kingston upon Thames
- Kinnersley
- Kirkham
- Knaresborough
- Knutsford
- Letchworth
- Letchworth Garden City
- Lewes
- Little Amwell
- Little Hallingbury
- Long Eaton
- Loughborough
- Lower Earley
- Malpas
- Manningtree
- Manton
- Mappleton
- Market Bosworth
- Market Weighton
- Measham
- Melbourne
- Mexborough
- Mickle Trafford
- Misterton
- Mottram St. Andrew
- Mountsorrel
- Murton
- Nafferton
- Narborough
- Neston
- Newark on Trent
- Newborough
- Newmarket
- Newport
- Oakham
- Odiham
- Orgreave
- Over
- Pickering
- Pinxton
- Poulton le Fylde
- Preston
- Purfleet
- Queniborough
- Quorndon
- Radcliffe on Trent
- Retford
- Rickmansworth
- Ringmer
- Rowhedge
- Royal Leamington Spa
- Ruddington
- Ryhill
- Ryton on Dunsmore
- Saint Albans
- Sandhurst
- Sawbridgeworth
- Scalby
- Seaton
- Severn Beach
- Shinfield
- Shirland
- Skelton
- South Collingham
- Staveley
- Stoke
- Stotfold
- Strensall
- Sutton Bonington
- Sutton upon Derwent
- Theydon Bois
- Thornton
- Thornton-Cleveleys
- Treeton
- Twyford
- Uxbridge
- Wansford
- Wareham
- Wargrave
- Wentworth
- West Bridgford
- West Hallam
- West Rainton
- Westerham
- Wheathampstead
- Whitefield
- Whitton
- Widnes
- Wigginton
- Willaston
- Wivenhoe
- Wye
- Yarnton
- Yateley
- Yatton
England- Hillsborough
Northern Ireland- Castle Douglas
Scotland
United Kingdom
Gonderange
Ronneby