Family Dytiscidae

• Subfamily Copelatinae
• Subfamily Laccophilinae
  • Tribe Laccophilini
    • Laccophilus biguttatus Kirby
    • ?Laccophilus fasciatus Aube
    • Laccophilus maculosus Say
    • Laccophilus proximus Say
  • Tribe Agabetinini
• Subfamily Hydroporinae
  • Tribe Bidessini
    • Liodessus affinis (Say)
    • ?Liodessus cantralli (Young)
    • Neoclypeodytes ornatellus (Fall)
  • Tribe Hydroporini
    • Hygrotus acaroides (LeConte)
    • Hygrotus canadensis (Fall)
    • Hygrotus compar (Fall)
    • !Hygrotus dissimilis Gemm. & Har.
    • ?Hygrotus farctus (LeConte)
    • Hygrotus impressopunctatus (Schaller)
    • Hygrotus infuscatus (Sharp)
    • ?Hygrotus laccophilinus (LeConte)
    • Hygrotus marklini (Gyllenhal)
    • Hygrotus masculinus (Crotch)
    • Hygrotus nigrescens Fall
    • Hygrotus nubilus (LeConte)
    • Hygrotus paludosalinus Larson
    • Hygrotus patruelis (LeConte)
    • ?Hygrotus picatus (Kirby)
    • Hygrotus punctilineatus (Fall)
    • Hygrotus salinarius (Wallis)
    • Hygrotus sayi J. Balfour-Browne
    • Hygrotus sellatus (LeConte)
    • Hygrotus semivittatus (Fall)
    • Hygrotus suturalis (LeConte)
    • Hygrotus tumidiventris (Fall)
    • Hygrotus turbidus (LeConte)
    • Hygrotus unguicularis (Crotch)
    • ?Hydrocolus paugus (Fall)
    • ?Hydrocolus rubyae (Larson)
    • ?Hydrocolus stagnalis (Gemminger & Harold)
    • ?Sanfilippodytes compertus (Brown)
    • ?Sanfilippodytes edwardsi (Wallis)
    • ?Sanfilippodytes planiusculus (Fall)
    • ?Hydroporus appalachius Sherman
    • ?Hydroporus badiellus Fall
    • ?Hydroporus carri Larson
    • ?Hydroporus columbianus Fall
    • ?Hydroporus criniticoxis Larson
    • ?Hydroporus dentellus Fall
    • Hydroporus despectus Sharp
    • ?Hydroporus fuscipennis Schaum
    • ?Hydroporus larsoni Nilsson
    • Hydroporus mannerheimi Balf.-Br.
    • ?Hydroporus morio Aube
    • ?Hydroporus nigellus Mannerheim
    • ?Hydroporus notabilis LeConte
    • ?Hydroporus obscurus Sturm
    • ?Hydroporus occidentalis Sharp
    • ?Hydroporus pervicinus Fall
    • ?Hydroporus puberulus LeConte
    • ?Hydroporus rectus Fall
    • ?Hydroporus rufinasus Mannerheim
    • ?Hydroporus signatus Mannerheim
    • ?Hydroporus striola Gyllenhal
    • ?Hydroporus tataricus LeConte
    • ?Hydroporus tenebrosus LeConte
    • ?Hydroporus tristis (Paykull)
    • Hydroporus subpubescens LeConte
    • Neoporus superioris (Balfour-Browne)
    • Neoporus undulatus (Say)
    • Neoporus vittatus (LeConte)
    • Neoporus dimidiatus (Gemm. & Harold)
    • Nebrioporus depressus (Fabricius)
    • ?Nebrioporus macronychus (Shirt & Angus)
    • Stictotarsus griseostriatus (DeGr.)
    • ?Stictotarsus spenceri (Leech)
    • Stictotarsus striatellus (LeConte)
    • Oreodytes productotruncatus Hatch
    • Oreodytes angustior (Hatch)
    • Oreodytes congruus (LeConte)
    • Oreodytes crassulus (Fall)
    • Oreodytes laevis (Kirby)
    • ?Oreodytes picturatus (Horn)
    • Oreodytes quadrimaculatus (Horn)
    • Oreodytes obesus (LeConte)
    • Oreodytes scitulus (LeConte)
    • Oreodytes snoqualmie (Hatch)
  • Tribe Hydrovatini
  • Tribe Hyphydrini
    • ?Desmopachria convexa (Aube)
  • Tribe Laccornini
    • Laccornis conoideus (LeConte)
    • !Laccornis pacificus Leech
  • Tribe Methlini
• Subfamily Colymbetinae
  • Tribe Agabini
    • Agabus ajax Fall
    • Agabus ambiguus (Say)
    • Agabus antennatus Leech
    • ?Agabus anthracinus Mannerheim
    • Agabus approximatus Fall
    • ?Agabus arcticus (Paykull)
    • ?Agabus audeni Wallis
    • Agabus austinii Sharp
    • ?Agabus bicolor (Kirby)
    • Agabus bifarius (Kirby)
    • Agabus bjorkmanae Hatch
    • Agabus canadensis Fall
    • ?Agabus clavicornis Sharp
    • ?Agabus confinis (Gyllenhal)
    • !Agabus discolor (Harris)
    • Agabus disintegratus (Crotch)
    • ?Agabus elongatus (Gyllenhal)
    • Agabus erichsoni Gemm. & Har.
    • ?Agabus falli (Zimmermann)
    • ?Agabus fuscipennis (Paykull)
    • !Agabus gagates Aube
    • Agabus griseipennis LeConte
    • ?Agabus inscriptus (Crotch)
    • !Agabus inscriptus (Crotch)
    • Agabus kootenai Larson
    • Agabus lutosus LeConte
    • Agabus nectris Leech
    • Agabus obliteratus LeConte
    • ?Agabus oblongulus Fall
    • ?Agabus opacus Aube
    • ?Agabus phaeopterus (Kirby)
    • ?Agabus pisobius Leech
    • ?Agabus punctulatus Aube
    • Agabus semivittatus LeConte
    • ?Agabus semipunctatus (Kirby)
    • Agabus seriatus (Say)
    • ?Agabus smithi Brown
    • Agabus strigulosus (Crotch)
    • ?Agabus thomsoni (J. Sahlberg)
    • Agabus tristis Aube
    • ?Agabus triton Fall
    • Agabus verisimilis Brown
    • ?Agabus wasastjernae (C.R. Sahlberg)
    • ?Carrhydrus crassipes Fall
    • Ilybius angustior (Gyllenhal)
    • Ilybius biguttulus (Germar)
    • !Ilybius confusus Aube
    • ?Ilybius discedens Sharp
    • Ilybius fraterculus LeConte ()?
    • ?Ilybius picipes (Kirby)
    • Ilybius pleuriticus LeConte ()?
    • Ilybius subaeneus Erichson ()?
    • Ilybius quadrimaculatus Aube
  • Tribe Colymbetini
    • ?Colymbetes dahuricus Aube
    • Colymbetes densus LeConte
    • Colymbetes incognitus Zimmerman
    • ?Colymbetes dolabratus (Paykull)
    • Colymbetes exaratus LeConte
    • ?Colymbetes paykulli Erichson
    • Colymbetes sculptilis Harris
    • ?Neoscutopterus angustus (LeConte)
    • ?Neoscutopterus angustus (LeConte)
    • Rhantus binotatus (Harris)
    • Rhantus consimilis Motschulsky
    • Rhantus sericans Sharp
    • Rhantus gutticollis Say
    • ?Rhantus sinuatus (LeConte)
    • Rhantus suturellus (Harris)
    • Rhantus wallisi Hatch
  • Tribe Coptotomini
    • Coptotomus longulus LeConte
  • Tribe Matini
• Subfamily Dytiscinae
  • Tribe Cybistrini
  • Tribe Dytiscini
    • Dytiscus alaskanus Balfour-Browne
    • Dytiscus circumcinctus Ahrens
    • Dytiscus cordieri Aube
    • Dytiscus dauricus Gebler
    • Dytiscus fasciventris Say
    • Dytiscus harrisii Kirby
    • Dytiscus hatchi Wallis
    • Dytiscus hybridus Aube
    • Dytiscus marginicollis LeConte
  • Tribe Eretini
  • Tribe Hydaticini
    • Hydaticus aruspex Clark
    • ?Hydaticus piceus LeConte
  • Tribe Aciliini
    • Acilius abbreviatus Mannerheim
    • ?Acilius athabascae Larson
    • Acilius semisulcatus Aube
    • Acilius sylvanus Hilsenhoff
    • Graphoderus liberus (Say)
    • Graphoderus occidentalis Horn
    • Graphoderus perplexus Sharp
    • Thermonectus ornaticollis Aube