| Agabus (Agabus) gringo Larson, 2000 | |
| Agabus (Gaurodytes) guttatus Paykull, 1798 | Largeflower evening primrose |
| Agabus (Gaurodytes) heydeni Wehncke, 1872 | |
| Agabus corticeus ♰ Lomnicki, 1894 | |
| Agametrus nitens Sharp, 1887 | |
| Agametrus peruvianus Laporte, 1835 | |
| Anodocheilus francescae Young, 1974 | Sand-dune skyrocket |
| Anodocheilus germanus Sharp, 1882 | |
| Anodocheilus guatemalensis Zaitzev, 1910 | |
| Anodocheilus maculatus Babington, 1841 | |
| Anodocheilus ruthae Young, 1974 | Sand-dune skyrocket |
| Anodocheilus silvestrii Régimbart, 1903 | |
| Anodocheilus villae Young, 1974 | Sand-dune skyrocket |
| Bidessodes (Bidessodes) elongatus Sharp, 1882 | |
| Bidessonotus canis K.B.Miller, 1997 | |
| Bidessonotus championi J.Balfour-Br..., 1947 | |
| Bidessonotus inigmaticus Young, 1990 | |
| Bidessonotus mexicanus Régimbart, 1895 | |
| Bidessonotus mobilis J.Balfour-Br..., 1947 | |
| Bidessonotus morosus J.Balfour-Br..., 1947 | |
| Bidessonotus paludicolus Young, 1990 | |
| Bidessonotus peregrinus J.Balfour-Br..., 1947 | |
| Bidessonotus pictus Young, 1990 | |
| Bidessonotus pollostus Young, 1990 | |
| Bidessonotus regimbarti J.Balfour-Br..., 1947 | |
| Bidessonotus rhampherens Young, 1990 | |
| Bidessonotus rubellus Young, 1990 | |
| Bidessonotus sobrinus J.Balfour-Br..., 1947 | |
| Bidessonotus tibialis Régimbart, 1895 | |
| Bidessonotus vicinus J.Balfour-Br..., 1947 | |
| Bidessus guatemalensis (Zaitzev, 1910) | ⇒ Anodocheilus guatemalensis Zaitzev, 1910 |
| Boreonectes aequinoctialis H.Clark, 1862 | |
| Boreonectes funereus Crotch, 1873 | |
| Boreonectes striatellus LeConte, 1852 | |
| Brachyvatus apicatus Clark, 1862 | |
| Celina contiger Guignot, 1947 | |
| Celina debilis Sharp, 1882 | Grand Junction camissonia |
| Celina gracilicornis Sharp, 1882 | Grand Junction camissonia |
| Celina guayaquilensis Guignot, 1953 | |
| Celina punctata Sharp, 1882 | Grand Junction camissonia |
| Clarkhydrus corvinus Sharp, 1887 | |
| Clarkhydrus decemsignatus Clark, 1862 | |
| Clarkhydrus eximius Motschulsky, 1859 | |
| Clarkhydrus interjectus Sharp, 1882 | |
| Clarkhydrus minax Zimmerman, 1982 | |
| Clarkhydrus opaculus Sharp, 1882 | |
| Clarkhydrus roffii Clark, 1862 | |
| Copelatus agrias Guignot, 1954 | |
| Copelatus biformis Sharp, 1882 | Grand Junction camissonia |
| Copelatus biolleyi Guignot, 1952 | Chain fern |
| Copelatus caelatipennis Aubé, 1838 | Grand Junction camissonia |
| Copelatus caelatipennis fragilis Sharp, 1882 | |
| Copelatus caelatus Guignot, 1952 | Chain fern |
| Copelatus chevrolati Aubé, 1838 | Chain fern |
| Copelatus chevrolati renovatus Guignot, 1952 | |
| Copelatus chibcha Guignot, 1952 | Chain fern |
| Copelatus debilis Sharp, 1882 | Grand Junction camissonia |
| Copelatus depressus Sharp, 1882 | Grand Junction camissonia |
| Copelatus distinctus Aubé, 1838 | |
| Copelatus duodecimstriatus Aubé, 1838 | |
| Copelatus impressicollis (Sharp, 1882) | ⇒ Copelatus distinctus Aubé, 1838 |
| Copelatus incognitus Sharp, 1882 | Grand Junction camissonia |
| Copelatus integer Sharp, 1882 | Grand Junction camissonia |
| Copelatus laccophilinus Sharp, 1882 | Grand Junction camissonia |
| Copelatus laeticulus Sharp, 1882 | Grand Junction camissonia |
| Copelatus latifasciatus Bilardo & Ro..., 1999 | |
| Copelatus mancus Sharp, 1887 | Diamond Valley suncup |
| Copelatus mundus Sharp, 1882 | Grand Junction camissonia |
| Copelatus nigricans Sharp, 1882 | Grand Junction camissonia |
| Copelatus paryphes Guignot, 1955 | |
| Copelatus posticatus Fabricius, 1801 | |
| Copelatus prolongatus Sharp, 1882 | Grand Junction camissonia |
| Copelatus proximus Sharp, 1882 | Grand Junction camissonia |
| Copelatus sallaei Sharp, 1882 | Grand Junction camissonia |
| Copelatus sharpi (Branden, 1885) | ⇒ Exocelina australis Clark, 1863 |
| Copelatus silvestrii Régimbart, 1903 | |
| Copelatus solitarius Sharp, 1882 | Grand Junction camissonia |
| Copelatus terminalis Sharp, 1882 | Grand Junction camissonia |
| Copelatus validus Sharp, 1882 | Grand Junction camissonia |
| Copelatus yaguarete Scheers, 2018 | |
| Coptotomus serripalpus Say, 1830 | Prickly scorpion's-tail |
| Coptotomus venustus Say, 1823 | |
| Cybister (Cybister) cavicollis Sharp, 1887 | |
| Cybister (Cybister) explanatus LeConte, 1852 | |
| Cybister (Cybister) fimbriolatus Say, 1823 | Predaceous Diving Beetle |
| Cybister (Cybister) flavocinctus Aubé, 1838 | |
| Cybister (Cybister) fusculus (Zimmermann, 1919) | ⇒ Cybister explanatus LeConte, 1852 |
| Cybister (Neocybister) festae Griffini, 1895 | |
| Deronectes bicostatus Schaum, 1864 | |
| Derovatellus floridanus (Fall, 1932) | ⇒ Derovatellus lentus Wehncke, 1876 |
| Derovatellus ibarrai Spangler, 1966 | |
| Derovatellus lentus Wehncke, 1876 | |
| Desmopachria basicollis Guignot, 1950 | Miller Canyon woodlandsnail |
| Desmopachria bryanstonii Clark, 1862 | |
| Desmopachria circularis Sharp, 1882 | Grand Junction camissonia |
| Desmopachria decorosa Young, 1995 | |
| Desmopachria defloccata Young, 1981 | |
| Desmopachria dispar Sharp, 1882 | Grand Junction camissonia |
| Desmopachria dispersa Crotch, 1873 | |
| Desmopachria flavida Young, 1981 | |
| Desmopachria glabricula Sharp, 1882 | Grand Junction camissonia |
| Desmopachria grouvellei Régimbart, 1895 | |
| Desmopachria isthmia Young, 1981 | |
| Desmopachria majuscula Young, 1990 | |
| Desmopachria margarita Young, 1990 | |
| Desmopachria mexicana Sharp, 1882 | Grand Junction camissonia |
| Desmopachria mortimer K.B.Miller, 2020 | |
| Desmopachria mutata Sharp, 1882 | Grand Junction camissonia |
| Desmopachria pittieri Young, 1995 | |
| Desmopachria portmanni Clark, 1862 | |
| Desmopachria signata Zimmermann, 1921 | |
| Desmopachria sobrina Young, 1995 | |
| Desmopachria speculum Sharp, 1887 | Diamond Valley suncup |
| Desmopachria striola Sharp, 1887 | Diamond Valley suncup |
| Desmopachria variegata Sharp, 1882 | Grand Junction camissonia |
| Desmopachria vicina Sharp, 1887 | Diamond Valley suncup |
| Desmopachria volvata Young, 1981 | |
| Desmopachria zethus Young, 1995 | |
| Desmopachria zimmermani Young, 1981 | |
| Dytiscus (Dytiscus) latissimus Linnaeus, 1758 | Gray bushmallow |
| Dytiscus habilis Say, 1830 | Prickly scorpion's-tail |
| Eretes explicitus K.B.Miller, 2002 | |
| Eretes griseus Fabricius, 1781 | |
| Eretes sticticus (Linnaeus, 1767) | ⇒ Eretes griseus Fabricius, 1781 |
| Exocelina australis Clark, 1863 | |
| Exocelina glypta Guignot, 1955 | |
| Graptodytes pictus Fabricius, 1787 | |
| Hydaticus (Prodaticus) fractivittis Guignot, 1951 | |
| Hydaticus (Prodaticus) rimosus Aubé, 1838 | |
| Hydrodytes inaciculatus Guignot, 1957 | |
| Hydrodytes opalinus Zimmermann, 1921 | |
| Hydroporus (Hydroporus) discretus Fairmaire & ..., 1859 | |
| Hydroporus (Hydroporus) obsoletus Aubé, 1838 | |
| Hydroporus (Hydroporus) pubescens Gyllenhal, 1808 | |
| Hydroporus civicus Sharp, 1887 | Diamond Valley suncup |
| Hydroporus nevadensis Sharp, 1882 | Grand Junction camissonia |
| Hydrovatus concolor Sharp, 1887 | Diamond Valley suncup |
| Hydrovatus hintoni Biström, 1997 | |
| Hydrovatus hornii Crotch, 1873 | |
| Hydrovatus ischyrus Guignot, 1954 | |
| Hydrovatus kavanaughi Biström, 1997 | |
| Hydrovatus leconteii Clark, 1862 | |
| Hydrovatus longior Biström, 1997 | |
| Hydrovatus regimbarti Zimmermann, 1919 | Florida Mountain woodlandsnail |
| Hydrovatus sharpi (Branden, 1885) | ⇒ Hydrovatus regimbarti Zimmermann, 1919 |
| Hydrovatus youngi Biström, 1997 | |
| Hygrotus (Coelambus) lutescens LeConte, 1852 | Predaceous diving beetle |
| Hygrotus (Coelambus) novemlineatus Stephens, 1829 | |
| Hygrotus (Coelambus) nubilus LeConte, 1855 | |
| Hygrotus (Coelambus) patruelis LeConte, 1855 | |
| Hygrotus (Coelambus) unguicularis Crotch, 1874 | |
| Hygrotus (Coelambus) wardii Clark, 1862 | |
| Hygrotus infacetus Clark, 1862 | |
| Ilybiosoma amaroides Sharp, 1882 | |
| Ilybiosoma flohrianum Sharp, 1887 | |
| Ilybiosoma minnesotense Wallis, 1933 | |
| Ilybiosoma oaxacaense Larson, 2000 | |
| Ilybiosoma oaxacense Larson, 2000 | |
| Ilybiosoma regulare LeConte, 1852 | |
| Ilybius walsinghami Crotch, 1873 | |
| Laccomimus distinctus Toledo & Michat, 2015 | |
| Laccomimus pumilio LeConte, 1878 | |
| Laccomimus spangleri Toledo & Michat, 2015 | |
| Laccophilus agilis Sharp, 1887 | Diamond Valley suncup |
| Laccophilus duplex Sharp, 1882 | Grand Junction camissonia |
| Laccophilus fasciatus Aubé, 1838 | Grand Junction camissonia |
| Laccophilus fasciatus fasciatus Aubé, 1838 | |
| Laccophilus filicornis Sharp, 1887 | Diamond Valley suncup |
| Laccophilus fragilis Sharp, 1887 | Diamond Valley suncup |
| Laccophilus fuscipennis Sharp, 1882 | Grand Junction camissonia |
| Laccophilus gentilis LeConte, 1863 | Grand Junction camissonia |
| Laccophilus gentilis suavis Sharp, 1882 | |
| Laccophilus huastecus Zimmerman, 1970 | |
| Laccophilus hyalinus De Geer, 1774 | |
| Laccophilus leechi Zimmerman, 1970 | |
| Laccophilus maculosus Say, 1823 | Dingy Diver |
| Laccophilus mexicanus Aubé, 1838 | |
| Laccophilus mexicanus mexicanus Aubé, 1838 | |
| Laccophilus mexicanus oaxacensis Zimmerman, 1970 | |
| Laccophilus mistecus Sharp, 1882 | Grand Junction camissonia |
| Laccophilus mistecus aztecus Zimmerman, 1970 | |
| Laccophilus mistecus mistecus Sharp, 1882 | |
| Laccophilus oscillator Sharp, 1882 | Grand Junction camissonia |
| Laccophilus oscillator laevipennis Sharp, 1882 | |
| Laccophilus oscillator oscillator Sharp, 1882 | |
| Laccophilus ovatus Sharp, 1882 | Grand Junction camissonia |
| Laccophilus ovatus zapotecus Zimmerman, 1970 | |
| Laccophilus peregrinus Zimmerman, 1970 | |
| Laccophilus peregrinus peregrinus Zimmerman, 1970 | |
| Laccophilus peregrinus variabilis Zimmerman, 1970 | |
| Laccophilus perparvulus Régimbart, 1895 | |
| Laccophilus persimilis Régimbart, 1895 | |
| Laccophilus pictus (Laporte, 1835) | ⇒ Laccophilus hyalinus De Geer, 1774 |
| Laccophilus pictus pictus Laporte, 1835 | |
| Laccophilus proximus Say, 1823 | |
| Laccophilus pseudomexicanus Zimmerman, 1970 | |
| Laccophilus quadrilineatus G. Horn, 1871 | Scratchbush |
| Laccophilus quadrilineatus mayae Zimmerman, 1970 | |
| Laccophilus quadrilineatus tehuanensis Zimmerman, 1970 | |
| Laccophilus raitti Zimmerman, 1970 | |
| Laccophilus salvini Sharp, 1882 | Grand Junction camissonia |
| Laccophilus sonorensis Zimmerman, 1970 | |
| Laccophilus spangleri Zimmerman, 1970 | |
| Laccophilus spergatus Sharp, 1882 | Grand Junction camissonia |
| Laccophilus vacaensis Young, 1953 | Ball-head skyrocket |
| Laccophilus vacaensis thermophilus Zimmerman, 1970 | |
| Laccophilus youngi Zimmerman, 1970 | |
| Laccophilus zimmermani Arce-Pérez &..., 2017 | |
| Leconectes striatellus LeConte, 1852 | |
| Liodessus abjectus Sharp, 1882 | |
| Liodessus adumbratus Clark, 1862 | |
| Liodessus obscurellus LeConte, 1852 | |
| Megadytes (Bifurcitus) giganteus (Laporte, 1835) | ⇒ Megadytes lherminieri Guérin-Ménev..., 1829 |
| Megadytes (Bifurcitus) lherminieri Guérin-Ménev..., 1829 | |
| Megadytes (Bifurcitus) magnus Trémouilles ..., 1980 | |
| Megadytes (Megadytes) flohri Sharp, 1882 | Grand Junction camissonia |
| Megadytes (Megadytes) fraternus Sharp, 1882 | Grand Junction camissonia |
| Megadytes (Megadytes) guignoti Mouchamps, 1957 | |
| Megadytes (Trifurcitus) obesus Sharp, 1882 | Grand Junction camissonia |
| Mystonectes grammicus Sharp, 1887 | |
| Nebrioporus (Nebrioporus) depressus Fabricius, 1775 | |
| Nectoboreus aequinoctialis Clark, 1862 | |
| Nectoboreus funereus Crotch, 1873 | |
| Neobidessus obtusoides Young, 1977 | |
| Neobidessus obtusus Sharp, 1882 | |
| Neobidessus persimilis Régimbart, 1895 | |
| Neobidessus spangleri Young, 1977 | |
| Neobidessus youngi Leech, 1948 | |
| Neoclypeodytes astrapus K.B.Miller, 2001 | |
| Neoclypeodytes balkei Scheers & Há..., 2020 | |
| Neoclypeodytes challeti K.B.Miller, 2001 | |
| Neoclypeodytes cinctellus LeConte, 1852 | |
| Neoclypeodytes curtulus Sharp, 1887 | |
| Neoclypeodytes discedens Sharp, 1882 | |
| Neoclypeodytes edithae K.B.Miller, 2001 | |
| Neoclypeodytes fortunensis Scheers & Há..., 2020 | |
| Neoclypeodytes fryii Clark, 1862 | |
| Neoclypeodytes haroldi K.B.Miller, 2001 | |
| Neoclypeodytes latifrons Sharp, 1882 | |
| Neoclypeodytes luctuosus Guignot, 1949 | |
| Neoclypeodytes lynceus Sharp, 1882 | |
| Neoclypeodytes megalus K.B.Miller, 2001 | |
| Neoclypeodytes moroni Arce-Pérez &..., 2015 | |
| Neoclypeodytes nanus K.B.Miller, 2001 | |
| Neoclypeodytes obesus Sharp, 1882 | |
| Neoclypeodytes quadrinotatus Sharp, 1882 | |
| Neoclypeodytes similis K.B.Miller, 2001 | |
| Neoclypeodytes tumulus K.B.Miller, 2001 | |
| Neptosternus compsus Guignot, 1953 | |
| Pachydrus cribratus Sharp, 1882 | Grand Junction camissonia |
| Pachydrus obesus Sharp, 1882 | Grand Junction camissonia |
| Pachydrus politus Sharp, 1882 | Grand Junction camissonia |
| Platambus americanus Aubé, 1838 | |
| Platambus apache Young, 1981 | |
| Platambus aztec Larson, 2000 | |
| Platambus maculatus Linnaeus, 1758 | |
| Platambus maya Larson, 2000 | |
| Platambus mexicanus Larson, 2000 | |
| Platambus semivittatus LeConte, 1852 | |
| Platambus spinipes Sharp, 1882 | |
| Platynectes (Platynectes) parananus Sharp, 1882 | Grand Junction camissonia |
| Platynectes (Platynectes) rodriguezi Severin, 1890 | |
| Platynectes nitens Sharp, 1887 | |
| Platynectes zoque Stastný, Von..., 2020 | |
| Queda compressa Sharp, 1882 | Grand Junction camissonia |
| Queda youngi Biström, 1990 | |
| Rhantus (Rhantus) anisonychus Crotch, 1873 | |
| Rhantus (Rhantus) atricolor Aubé, 1838 | |
| Rhantus (Rhantus) binotatus (Harris, 1828) | ⇒ Rhantus gutticollis Say, 1830 |
| Rhantus (Rhantus) bohlei Balke, Rough..., 2002 | |
| Rhantus (Rhantus) calidus Fabricius, 1792 | |
| Rhantus (Rhantus) exsoletus Forster, 1771 | |
| Rhantus (Rhantus) gutticollis Say, 1830 | Predaceous diving beetle |
| Rhantus (Rhantus) souzannae Balke, 1990 | |
| Sanfilippodytes kingii Clark, 1862 | |
| Sanfilippodytes sbordonii Franciscolo, 1979 | |
| Stictotarsus aequinoctialis (Clark, 1862) | ⇒ Boreonectes aequinoctialis H.Clark, 1862 |
| Stictotarsus corvinus Sharp, 1887 | |
| Stictotarsus decemsignatus Clark, 1862 | |
| Stictotarsus eximius Motschulsky, 1859 | |
| Stictotarsus funereus (Crotch, 1873) | ⇒ Boreonectes funereus Crotch, 1873 |
| Stictotarsus grammicus Sharp, 1887 | |
| Stictotarsus interjectus Sharp, 1882 | |
| Stictotarsus minax Zimmerman, 1982 | |
| Stictotarsus opaculus Sharp, 1882 | |
| Stictotarsus roffii Clark, 1862 | |
| Stictotarsus striatellus (LeConte, 1852) | ⇒ Boreonectes striatellus LeConte, 1852 |
| Thermonectus basillaris Harris, 1829 | |
| Thermonectus circumscriptus Latreille, 1809 | Cancellate semele |
| Thermonectus cuneatus Sharp, 1882 | Grand Junction camissonia |
| Thermonectus depictus Sharp, 1882 | Grand Junction camissonia |
| Thermonectus margineguttatus Aubé, 1838 | |
| Thermonectus marmoratus Gray, 1831 | Spotted diving beetle |
| Thermonectus nigrofasciatus Aubé, 1838 | |
| Thermonectus nigrofasciatus nigrofasciatus Aubé, 1838 | |
| Thermonectus nigrofasciatus ornaticollis Aubé, 1838 | |
| Thermonectus nobilis Zimmermann, 1924 | Eveningsnow |
| Thermonectus sibleyi Goodhue-McWi..., 1981 | |
| Thermonectus succinctus Aubé, 1838 | |
| Thermonectus zimmermani Goodhue-McWi..., 1981 | |
| Uvarus costaricensis Guignot, 1939 | |
| Uvarus magensis Clark, 1862 | |
| Uvarus spretus Sharp, 1882 | |
| Uvarus subornatus Sharp, 1882 | |
| Vatellus mexicanus Sharp, 1882 | |
