Hydroglyphus geminus
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Coleoptera
- family: Dytiscidae
- genus: Hydroglyphus
- species: Hydroglyphus geminus
- France
Särö
Halland- Borgholm
- Södra Sandby
Kalmar- Bergshamra
- Djursholm
Stockholm- Mjölby
Östergötland
Sweden
Jonen- Merenschwand
Aargau- Aire-la-Ville
- Jussy
Geneva- Ottenbach
Zurich
Switzerland
Addlestone- Alton
- Arlesey
- Arundel
- Askern
- Awsworth
- Barlborough
- Barlby
- Bayswater
- Bedford
- Beighton
- Belsize Park
- Bexhill-on-Sea
- Bishops Waltham
- Blackheath
- Bordon
- Borrowash
- Bovingdon
- Brading
- Brampton
- Bransgore
- Brockenhurst
- Broomfleet
- Broughton
- Broxbourne
- Burgess Hill
- Burton Joyce
- Burton upon Trent
- Castor
- Catcliffe
- Caterham
- Chafford Hundred
- Chapel Allerton
- Charvil
- Chelsea
- Chertsey
- Cheshunt
- Chesterfield
- Chiddingfold
- Chigwell
- Chobham
- Comberton
- Cookham
- Copmanthorpe
- Cotgrave
- Cromford
- Cropwell Bishop
- Crowland
- Crowthorne
- Dartford
- Deal
- Ditton Hill
- Earley
- East Leake
- East Molesey
- Eastwood
- Edwinstowe
- Elstead
- Elstow
- Etwall
- Eversley
- Eye
- Farnham
- Farnham Royal
- Finchampstead
- Findern
- Glinton
- Glossop
- Godmanchester
- Goostrey
- Gravesend
- Grays
- Great Bookham
- Great Stukeley
- Griston
- Hackney
- Hale
- Hammersmith
- Harefield
- Harthill
- Hatfield
- Hayle
- Haywards Heath
- Heanor
- Helpston
- Hemingford Grey
- Heslington
- High Halstow
- Highbridge
- Hinchley Wood
- Holtby
- Horsforth
- Huntingdon
- Hythe
- Ibstock
- Ilkeston
- Ivinghoe
- Kensington
- Kilburn
- Killamarsh
- Kings Worthy
- Kingston upon Thames
- Knaphill
- Lechlade
- Leeds
- Lewes
- Long Eaton
- Lydd
- Marholm
- Matlock
- Melbourn
- Meldreth
- Millington
- Mitcham
- Mobberley
- Monk Fryston
- Moulsoe
- Murton
- New Milton
- Newborough
- Newport
- Normandy
- North Elmham
- Orgreave
- Pangbourne
- Peakirk
- Peterborough
- Pevensey
- Pinxton
- Pitsea
- Radcliffe on Trent
- Radley
- Rainham
- Reading
- Redhill
- Repton
- Riccall
- Rickmansworth
- Ringway
- Ripley
- Robertsbridge
- Roydon
- Ryton on Dunsmore
- Sandown
- Scalby
- Selsey
- Severn Beach
- Sherburn in Elmet
- Sheringham
- Sileby
- Sonning
- South Collingham
- South Nutfield
- Southall
- Staines
- Stainforth
- Staveley
- Stevenage
- Strensall
- Sunningdale
- Surbiton
- Sutton Courtenay
- Sway
- Teddington
- Thames Ditton
- Thornhaugh
- Tilbury
- Tilehurst
- Treeton
- Twyford
- Ufford
- Upton
- Wandsworth
- Wansford
- Ware
- Wargrave
- Waterbeach
- Welling
- West Hallam
- Westonzoyland
- Wheathampstead
- Whiston
- White Waltham
- Whitton
- Winchester
- Wingerworth
- Winterbourne
- Wirksworth
- Woodsetts
- Woolwich
- Wye
- Yateley
- Yaxley
England
United Kingdom
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