Diving-beetle
Guides
Acilius athabascae
Athabascan Predaceous Diving Beetle
Acilius athabascae is a species of predaceous diving beetle described by Larson in 1975. It belongs to the genus Acilius, a group of large diving beetles known for their streamlined bodies and predatory habits in aquatic environments. The species is found in North America, with records from Alberta and British Columbia in Canada.
Agabetes
Agabetes is a small genus of diving beetles (family Dytiscidae) in the subfamily Laccophilinae. The genus contains two described species: Agabetes acuductus, described from North America in 1828, and Agabetes svetlanae, described from the Palearctic region in 1989. The genus is the type genus of the tribe Agabetini. Members are aquatic beetles inhabiting freshwater environments.
Agabus
Agabus is a large genus of predatory aquatic beetles in the family Dytiscidae, established by William Elford Leach in 1817. Adults range from 5 to 14 mm in length. The genus has a primarily Holarctic distribution, with limited representation in the Afrotropic and Neotropic realms. Some species are of conservation concern, with A. clypealis, A. discicollis, and A. hozgargantae listed as endangered by the IUCN.
Agabus ajax
Agabus ajax is a predaceous diving beetle in the family Dytiscidae. The species was described by Fall in 1922. It is known from North America, with records from Alberta and British Columbia in Canada. As a member of Agabus, it is an aquatic predator.
Agabus ambiguus
Agabus ambiguus is a predaceous diving beetle in the family Dytiscidae, belonging to the North American endemic ambiguus species group. Adults are active in open water year-round, including throughout winter. The species occurs across the United States and Canada, where it inhabits depositional areas of springs, streams, and stream-fed ponds.
Agabus antennatus
Agabus antennatus is a species of predaceous diving beetle in the family Dytiscidae, first described by Leech in 1939. It is found in North America, with records from Alberta and British Columbia in Canada. As a member of the genus Agabus, it is an aquatic predator inhabiting freshwater environments.
Agabus clavicornis
Agabus clavicornis is a predaceous diving beetle in the family Dytiscidae. It is distributed across the Holarctic region, occurring in both North America and the Palearctic. The species was described by Sharp in 1882. Like other members of the genus Agabus, it is an aquatic predator.
Agabus cordatus
Agabus cordatus is a species of predaceous diving beetle in the family Dytiscidae, originally described by LeConte in 1853. It is currently treated as a synonym of Ilybiosoma cordatum, a genus distinguished from Agabus by subtle morphological features of the male genitalia and body proportions. Like other members of the subfamily Agabinae, it is an aquatic beetle inhabiting freshwater systems. Records indicate presence in North America.
Agabus fuscipennis
Agabus fuscipennis is a diving beetle species in the family Dytiscidae, belonging to the fuscipennis-group as defined by Larson (1989). It is characterized by a holarctic distribution, occurring across both the Palearctic and Nearctic regions. In North America, it is transcontinental in boreal regions. In Europe, it has a restricted distribution, recorded from Austria, Belarus, Czech Republic, Denmark, Estonia, Finland, Germany, Italy, Kaliningrad, Latvia, Lithuania, Norway, Poland, Russia, Sardinia, Sicily, Slovakia, Sweden, and Ukraine.
Agabus lutosus
River beetle
Agabus lutosus is a predaceous diving beetle in the family Dytiscidae, native to the Pacific coast of North America. It belongs to the lutosus-group of Agabus species, which are restricted to the Cordilleran and Great Plains regions of temperate western North America. The species hybridizes with A. griseipennis in the Pacific Northwest region.
Agabus punctulatus
Agabus punctulatus is a predaceous diving beetle in the family Dytiscidae. It inhabits freshwater environments and is distributed across North America, with records from western Canada including Alberta and British Columbia. As a member of the genus Agabus, it is part of a diverse group of aquatic beetles adapted to life in ponds, lakes, and slow-moving waters.
Agabus taeniolatus
Agabus taeniolatus is a species of predaceous diving beetle in the family Dytiscidae. It belongs to the large genus Agabus, which contains numerous aquatic beetle species found primarily in the Holarctic region. This species is documented from North America and shares the general ecological characteristics of the genus as an aquatic predator in freshwater habitats.
Agabus verisimilis
Agabus verisimilis is a species of predaceous diving beetle in the family Dytiscidae. It belongs to the large genus Agabus, which contains numerous similar-looking species primarily associated with freshwater habitats. The specific epithet "verisimilis" (meaning "very similar") likely refers to its close resemblance to other Agabus species. Information on this species is limited in published literature.
Blethisa
Blethisa is a genus of ground beetles in the family Carabidae, subfamily Elaphrinae. It comprises approximately nine extant species distributed across the Holarctic region, plus one fossil species from the Pleistocene. Members of this genus are associated with aquatic or semi-aquatic habitats, with documented diving behavior in at least one species.
Blethisa multipunctata
multidotted ground beetle, Dimpled Marsh Beetle
Blethisa multipunctata is a ground beetle species found along freshwater margins in Europe and parts of North America. It exhibits a rare amphibious lifestyle among carabid beetles, hunting both on land and underwater for extended periods. The species has been observed diving voluntarily and remaining submerged for up to 97 minutes without surfacing for air.
Celina grossula
Celina grossula is a species of predaceous diving beetle (family Dytiscidae) described by John Lawrence LeConte in 1863. It belongs to the subfamily Hydroporinae and tribe Methlini. The genus Celina comprises small to minute diving beetles that inhabit aquatic environments. Information regarding the specific biology and ecology of C. grossula remains limited in the available literature.
Clarkhydrus roffii
Clarkhydrus roffii is a species of predaceous diving beetle in the family Dytiscidae, subfamily Hydroporinae. It belongs to a genus of small diving beetles distributed in the Western Hemisphere. The species was described by Clark in 1862 and is known from limited collection records in North and Middle America. Like other members of Dytiscidae, it is an aquatic predator, though specific ecological details remain poorly documented.
Clarkhydrus spectabilis
Clarkhydrus spectabilis is a diving beetle species in the family Dytiscidae, described by Zimmerman in 1982. The genus Clarkhydrus belongs to the tribe Hydroporini within the subfamily Hydroporinae. As a member of the Dytiscidae family, this species is adapted to aquatic habitats. The specific epithet 'spectabilis' suggests notable or showy characteristics, though detailed biological information remains limited in available sources.
Colymbetes longulus
Colymbetes longulus is a species of diving beetle in the family Dytiscidae, first described by LeConte in 1862. It belongs to the subfamily Colymbetinae, a group of predatory aquatic beetles. The genus Colymbetes is among the more diverse genera of diving beetles, with species distributed across the Northern Hemisphere. Like other members of its family, this species is adapted to life in freshwater habitats.
Colymbetes sculptilis
Sculptured Predaceous Diving Beetle
Colymbetes sculptilis is a species of predaceous diving beetle in the family Dytiscidae. It is known from North America, with records from Canada (Alberta, British Columbia) and the United States. As a member of the genus Colymbetes, it is adapted to aquatic habitats and exhibits the typical diving beetle morphology of streamlined body form and hind legs modified for swimming. The specific epithet 'sculptilis' refers to the sculptured or carved appearance of the body surface.
Comaldessus
Comaldessus is a genus of diving beetles in the family Dytiscidae, established in 1995. The genus is monotypic, containing only the species Comaldessus stygius. It belongs to the tribe Bidessini within the subfamily Hydroporinae, a group of small predatory aquatic beetles.
Copelatus chevrolati
Chevrolat's Dytiscid
Copelatus chevrolati is a small diving beetle in the family Dytiscidae, subfamily Copelatinae. Adults measure 5.3–6.7 mm in length and 2.6–3.1 mm in width, with coloration ranging from pale to dark reddish brown. The species is distinguished from other North American Copelatus by having 8 or 9 discal striae on the elytra. Two subspecies are recognized: the eastern C. c. chevrolati and the western C. c. renovatus. The species has been recorded across the southern and central United States and was recently documented from Cuba, representing a significant range extension.
Copelatus distinctus
Copelatus distinctus is a species of diving beetle described by Aubé in 1838. It belongs to the genus Copelatus within the subfamily Copelatinae of the family Dytiscidae. The species is recorded from Middle America based on available distribution data. Like other members of Copelatus, it is an aquatic predator inhabiting freshwater environments.
Copelatus glyphicus
Copelatus glyphicus is a small diving beetle in the family Dytiscidae, described by Thomas Say in 1823. Adults measure 4.2–4.6 mm in length and 2.1–2.5 mm in width. The species is widely distributed across eastern North America.
Desmopachria circularis
Desmopachria circularis is a species of diving beetle described by Sharp in 1882. It belongs to the family Dytiscidae, a group of aquatic beetles adapted for underwater life. The genus Desmopachria is characterized by small body size and is distributed primarily in the Americas. This species is recorded from Middle America, though specific details about its biology remain poorly documented.
Desmopachria convexa
Desmopachria convexa is a species of predaceous diving beetle in the family Dytiscidae, first described by Aubé in 1838. It belongs to the subfamily Hydroporinae and tribe Hyphydrini. The species has a broad distribution spanning North and South America. Like other members of the genus Desmopachria, it is adapted to aquatic habitats and exhibits the compact, convex body form characteristic of this group of small diving beetles.
Deuteronectes picturatus
Deuteronectes picturatus is a species of diving beetle in the family Dytiscidae, first described by Horn in 1883. It belongs to the subfamily Hydroporinae, a diverse group of small to medium-sized predaceous diving beetles. The species is native to North America. Like other members of Dytiscidae, it is an aquatic beetle adapted to life in freshwater environments.
Dytiscus fasciventris
Understriped Diving Beetle
Dytiscus fasciventris, the Understriped Diving Beetle, is a predaceous diving beetle in the family Dytiscidae. The species is found in North America, with records from Canada (Alberta, British Columbia) and the United States. Like other members of the genus Dytiscus, it is an aquatic predator inhabiting freshwater environments.
Dytiscus marginicollis
giant green water beetle
Dytiscus marginicollis, commonly known as the giant green water beetle, is a predaceous diving beetle in the family Dytiscidae. It is among the larger species in the genus Dytiscus and is distributed across North America. Like other members of its genus, it is an aquatic predator inhabiting freshwater systems.
Dytiscus verticalis
Vertical Diving Beetle
Dytiscus verticalis is a species of predaceous diving beetle in the family Dytiscidae. As a member of the genus Dytiscus, it is among the largest diving beetles in North America. The species inhabits freshwater aquatic systems and, like other members of its genus, is an active predator in both larval and adult stages. The specific epithet 'verticalis' refers to a characteristic morphological feature of this species.
Graphoderus
Graphoderus is a genus of predaceous diving beetles in the family Dytiscidae, comprising 12 extant species and 2 extinct species known from fossils. The genus is native to the Holarctic region, with species distributed across Europe, North America, and parts of Asia. Several species are of conservation concern, particularly G. bilineatus, which is listed in Annexes II and IV of the European Habitats Directive and has experienced significant population declines across its range.
Graphoderus perplexus
predacious diving beetle
Graphoderus perplexus is a predaceous diving beetle in the family Dytiscidae, described by Sharp in 1882. It is distributed across the Holarctic region, occurring in both North America and the Palearctic. Like other members of its genus, it is an aquatic predator inhabiting freshwater environments. The species is part of the tribe Aciliini, which includes other medium to large diving beetles.
Haideoporus texanus
Edwards Aquifer Diving Beetle
Haideoporus texanus is a stygobiontic diving beetle endemic to the Edwards Aquifer of Texas. It is a subterranean aquatic species adapted to life in groundwater systems, with larvae possessing characteristic morphological features including a nasale and absence of primary pores MXd and LAc. The species was described in 1976 and represents an independently evolved lineage within the subfamily Hydroporinae.
Heterosternuta cocheconis
Heterosternuta cocheconis is a small predaceous diving beetle in the family Dytiscidae. The species was described by Fall in 1917. It has been recorded in eastern North America, including the Canadian provinces of New Brunswick and Québec. As a member of the subfamily Hydroporinae, it inhabits aquatic environments.
Heterosternuta wickhami
Hydroporus diving beetle
Heterosternuta wickhami is a predaceous diving beetle in the family Dytiscidae. The species was originally described as Hydroporus wickhami by Zaitzev in 1908. It has been documented in wadeable streams and is known from North America, with first records for Missouri reported from aquatic macroinvertebrate community samples collected between 2002 and 2018.
Hornectes quadrimaculatus
Hornectes quadrimaculatus is a species of predaceous diving beetle in the family Dytiscidae, subfamily Hydroporinae. Originally described as Hydroporus quadrimaculatus by Horn in 1883, it was later transferred to the genus Hornectes. The species epithet "quadrimaculatus" (four-spotted) refers to its characteristic elytral maculation. It belongs to the tribe Hydroporini within the speciose subfamily Hydroporinae, which contains many small to medium-sized diving beetles.
Hydaticus
Hydaticus is a genus of predatory diving beetles in the family Dytiscidae, comprising approximately 150 described species and 12 subspecies arranged in two subgenera: Hydaticus and Prodaticus. The genus has a cosmopolitan distribution spanning the Palearctic, Afrotropical, Nearctic, and Oriental regions. Members are aquatic predators found in freshwater habitats including streams, pools, and lentic environments.
Hydaticus bimarginatus
Hydaticus bimarginatus is a species of predaceous diving beetle in the family Dytiscidae, occurring across North America. The species is moderately well-documented with over 1,000 observations on iNaturalist, indicating established presence in aquatic habitats. As a member of Hydaticus, it is associated with lentic and lotic freshwater systems where it functions as an active predator.
Hydaticus rimosus
Hydaticus rimosus is a diving beetle species in the family Dytiscidae, first described by Aubé in 1838. The species belongs to the genus Hydaticus, a group of predatory aquatic beetles commonly found in freshwater habitats. It occurs in the Caribbean and Middle America based on documented distribution records.
Hydrocolus
Hydrocolus is a genus of small predaceous diving beetles in the family Dytiscidae, subfamily Hydroporinae. The genus was erected in 2000 to accommodate several species previously placed in related genera, particularly Hydroporus. It contains approximately twelve described species distributed primarily in North America, with some species known from northern Europe. Species are associated with lentic and lotic freshwater habitats.
Hydrocolus deflatus
Hydrocolus deflatus is a species of predaceous diving beetle in the family Dytiscidae, first described by Fall in 1923. It belongs to the genus Hydrocolus, a group of small to medium-sized diving beetles within the subfamily Hydroporinae. The species is documented from North America. Like other members of Dytiscidae, it is adapted to aquatic habitats.
Hydrocolus paugus
Hydrocolus paugus is a predaceous diving beetle in the family Dytiscidae, first described by Fall in 1923. Originally described as Hydroporus paugus, it was later transferred to the genus Hydrocolus. It is a member of the subfamily Hydroporinae, which contains small to medium-sized diving beetles. The species is known from limited collection records in western North America.
Hydrocolus stagnalis
Hydroporus Diving Beetle
Hydrocolus stagnalis is a small predaceous diving beetle in the family Dytiscidae, native to North America. Formerly classified under Hydroporus, it was reassigned to the genus Hydrocolus. The species is documented from western Canada, including Alberta and British Columbia. As a member of the Hydroporinae subfamily, it inhabits freshwater environments.
Hydroporus columbianus
Hydroporus columbianus is a species of predaceous diving beetle in the family Dytiscidae, first described by Fall in 1923. It belongs to the subfamily Hydroporinae, a diverse group of small to medium-sized diving beetles. The species is known from western North America, with records from Alberta and British Columbia in Canada. Like other members of the genus, it is an aquatic predator.
Hydroporus lapponum
Hydroporus lapponum is a predaceous diving beetle in the family Dytiscidae. The species has a broad Holarctic distribution, occurring across North America and the Palearctic region. It belongs to the genus Hydroporus, a large and diverse group of small diving beetles. The species was first described by Gyllenhal in 1808.
Hydroporus occidentalis
Hydroporus occidentalis is a species of predaceous diving beetle in the family Dytiscidae, described by Sharp in 1882. The species is known from North America, with records from the Canadian provinces of Alberta and British Columbia. As a member of the genus Hydroporus, it is a small to medium-sized diving beetle adapted to aquatic habitats.
Hydroporus tenebrosus
Hydroporus tenebrosus is a predaceous diving beetle in the family Dytiscidae, first described by LeConte in 1850. It belongs to the genus Hydroporus, a diverse group of small to medium-sized diving beetles. The species has been used as a morphological reference in taxonomic revisions due to its extreme similarity to H. subpubescens. As a member of the Dytiscidae, it is presumed to be an aquatic predator, though specific ecological details remain poorly documented in the accessible literature.
Hydrotrupes
Hydrotrupes is a genus of diving beetles (Dytiscidae: Agabinae) established by Sharp in 1882. The genus contains three species: two extant (H. chinensis in eastern China and H. palpalis in western North America) and one fossil (H. prometheus from Eocene Baltic amber). The fossil record establishes Hydrotrupes as at least 40 million years old and demonstrates remarkable morphological conservation over this timespan. The current disjunct distribution of living species is interpreted as a relict of a formerly widespread distribution across northern continents during the Eocene.
Hydrovatus
Hydrovatus is a genus of diving beetles in the family Dytiscidae, subfamily Hydroporinae, and tribe Hydrovatini. The genus comprises approximately 214 species globally, with documented presence across Asia, Europe, and the Americas. Members are aquatic beetles inhabiting lentic and slow-moving lotic freshwater environments. The genus was established by Motschulsky in 1853.
Hydrovatus hornii
Hydrovatus hornii is a species of predaceous diving beetle (family Dytiscidae) described by George Henry Crotch in 1873. It belongs to the subfamily Hydroporinae and tribe Hydrovatini, a group of small to medium-sized diving beetles adapted to aquatic habitats. The species is known from the Caribbean, Middle America, and North America, though specific biological details remain poorly documented in published literature.
Hygrotus dissimilis
Hygrotus dissimilis is a species of diving beetle in the family Dytiscidae, subfamily Hydroporinae. It was described by Gemminger and Harold in 1868. The species is placed in the genus Hygrotus, a group of small to medium-sized predatory beetles associated with aquatic habitats. As with many diving beetles, specific ecological and behavioral details for this species remain limited in published literature.
Hygrotus falli
Hygrotus falli is a diving beetle species in the family Dytiscidae, originally described by Wallis in 1924 under the basionym Coelambus falli. The species belongs to a genus of small to medium-sized predatory diving beetles commonly found in freshwater habitats. As with other members of Dytiscidae, it is likely adapted to aquatic life with modified hind legs for swimming, though specific ecological details for this species remain poorly documented in available sources.
Hygrotus impressopunctatus
Hygrotus impressopunctatus is a small diving beetle in the family Dytiscidae, first described by Schaller in 1783. It belongs to the subfamily Hydroporinae and is native to Europe. The species has been recorded in freshwater habitats. GBIF data indicate potential presence in North America and Southern Asia, though European distribution is best documented.
Hygrotus nubilus
Hygrotus nubilus is a diving beetle in the family Dytiscidae, first described by John Lawrence LeConte in 1855. Like other members of the genus, this species is associated with freshwater aquatic habitats. The genus Hygrotus is widely distributed across North America and includes numerous species of small to medium-sized diving beetles.
Hygrotus patruelis
Hygrotus patruelis is a species of diving beetle in the family Dytiscidae, first described by John Lawrence LeConte in 1855. It belongs to the genus Hygrotus, a group of small to medium-sized predaceous diving beetles commonly found in aquatic habitats. The species is recorded from North America. Like other dytiscids, it is adapted to underwater life with specialized respiratory structures.
Hygrotus picatus
Hygrotus picatus is a species of predaceous diving beetle in the family Dytiscidae. It is native to North America and belongs to a genus of small to medium-sized diving beetles commonly found in freshwater habitats. The species was first described by William Kirby in 1837. Like other members of Dytiscidae, it is adapted to aquatic life with streamlined bodies and modified hind legs for swimming.
Hygrotus punctilineatus
Hygrotus punctilineatus is a small diving beetle in the family Dytiscidae, subfamily Hydroporinae. It is one of many North American species in the genus Hygrotus, which are generally associated with lentic freshwater habitats. The species was described by Fall in 1919 based on specimens from North America. Like other members of Hygrotus, it is presumed to be an aquatic predator in standing water bodies, though specific ecological studies are limited.
Hygrotus salinarius
Hygrotus salinarius is a small diving beetle in the family Dytiscidae, originally described as Coelambus salinarius by Wallis in 1924. The species is native to North America and belongs to a genus commonly associated with saline or alkaline wetlands. Like other members of Dytiscidae, it is an aquatic predator as both larva and adult. Specific ecological details remain poorly documented in published literature.
Hygrotus sellatus
Hygrotus sellatus is a small diving beetle in the family Dytiscidae, described by LeConte in 1866. The species is known from North America, with limited observational records. As a member of the subfamily Hydroporinae, it inhabits freshwater aquatic environments.
Hygrotus tumidiventris
Hygrotus tumidiventris is a small diving beetle in the family Dytiscidae, originally described as Coelambus tumidiventris by Fall in 1919. It belongs to the subfamily Hydroporinae, a diverse group of predominantly small predatory aquatic beetles. The species is known from North America, though specific ecological details remain poorly documented. Like other Hygrotus species, it likely inhabits shallow freshwater habitats.
Hygrotus turbidus
Hygrotus turbidus is a species of diving beetle in the family Dytiscidae. It belongs to the subfamily Hydroporinae, a group of small to medium-sized predaceous diving beetles. The species was described by John Lawrence LeConte in 1855 and is known from North America. Like other members of the genus Hygrotus, it is likely associated with freshwater aquatic habitats.
Ilybius quadrimaculatus
Ilybius quadrimaculatus is a predaceous diving beetle in the family Dytiscidae, first described by Aubé in 1838. The species occurs in North America, with records from Alberta and British Columbia in Canada. As a member of the subfamily Agabinae, it inhabits freshwater aquatic environments where it functions as an active predator.
Laccophilus
Laccophilus is a genus of small diving beetles in the family Dytiscidae, distributed across temperate and tropical regions worldwide. These beetles inhabit freshwater environments and are characterized by their compact, oval bodies and relatively short antennae. The genus contains numerous species, though many remain poorly documented. Members are active swimmers and predators in aquatic ecosystems.
Laccophilus fasciatus terminalis
Laccophilus fasciatus terminalis is a subspecies of diving beetle in the family Dytiscidae, described by Sharp in 1882. As a member of the genus Laccophilus, it belongs to a group of small predatory aquatic beetles commonly known as crawling water beetles. The subspecies designation indicates geographic or morphological variation within the widespread species Laccophilus fasciatus. Like other laccophilines, it inhabits freshwater environments where it preys on small invertebrates.
Laccophilus gentilis
Laccophilus gentilis is a small predatory diving beetle in the family Dytiscidae, described by LeConte in 1863. It belongs to the subfamily Laccophilinae, a group of small, often brightly marked diving beetles commonly found in vegetated freshwater habitats. The species occurs in North America and Middle America. Like other members of its genus, it is an aquatic predator that likely inhabits ponds, marshes, and slow-moving waters with abundant vegetation.
Laccophilus maculosus
dingy diver
Laccophilus maculosus, commonly known as the dingy diver, is a predaceous diving beetle in the family Dytiscidae. The species is distributed across Central America and North America. It belongs to a genus of small to medium-sized diving beetles that inhabit freshwater environments.
Laccophilus maculosus decipiens
Laccophilus maculosus decipiens is a subspecies of predaceous diving beetle in the family Dytiscidae. It belongs to the genus Laccophilus, a diverse group of small to medium-sized diving beetles commonly found in freshwater habitats. The subspecies was described by LeConte in 1852 and occurs in North America and Middle America. Like other members of its genus, it is adapted to aquatic life with modified hind legs for swimming.
Laccophilus pictus coccinelloides
Laccophilus pictus coccinelloides is a subspecies of diving beetle in the family Dytiscidae, first described by Régimbart in 1889. It belongs to the genus Laccophilus, a group of small predatory diving beetles commonly found in aquatic habitats. The subspecies epithet 'coccinelloides' suggests a resemblance to ladybird beetles (Coccinellidae), likely referring to coloration or patterning. Like other members of its genus, this beetle is adapted to freshwater environments where it preys on small aquatic organisms.
Laccophilus pictus insignis
Laccophilus pictus insignis is a subspecies of diving beetle in the family Dytiscidae, described by Sharp in 1882. It belongs to the genus Laccophilus, a group of small predatory diving beetles commonly known as water beetles. The subspecies is distributed across Middle America and North America. As with other members of its genus, it is likely an aquatic predator inhabiting freshwater environments, though specific ecological details for this subspecies remain poorly documented in available sources.
Laccophilus sonorensis
Laccophilus sonorensis is a species of predaceous diving beetle in the family Dytiscidae, described by Zimmerman in 1970. It belongs to the genus Laccophilus, a group of small to medium-sized diving beetles commonly found in aquatic habitats. The species is distributed in Middle America. Very little specific information is available about its biology or ecology.
Leconectes striatellus
Leconectes striatellus is a species of predaceous diving beetle in the family Dytiscidae. The species was originally described as Hydroporus striatellus by LeConte in 1852 and later transferred to the genus Leconectes. It occurs in freshwater aquatic habitats across North and Middle America. As a member of the subfamily Hydroporinae, it represents a lineage of small to medium-sized diving beetles.
Liodessus
Liodessus is a genus of small diving beetles in the family Dytiscidae, tribe Bidessini. Species occur across the Americas from North America through the Andes to southern South America, with notable diversity in high-altitude wetlands and páramo ecosystems. Many species inhabit shallow, exposed pools and temporary water bodies, showing phenotypic plasticity in body form correlated with habitat permanence. The genus contains numerous species, with several new species described from the high Andes of Peru and Colombia in recent years. Taxonomic resolution relies heavily on male genital morphology.
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Cantrall's bog beetle, Cantrall's Bog-beetle
Liodessus cantralli, known as Cantrall's bog beetle, is a small predaceous diving beetle in the family Dytiscidae. It belongs to the tribe Bidessini within the subfamily Hydroporinae. The species was described by Young in 1953 and was originally placed in the genus Bidessus. It occurs in bog habitats in parts of North America, with confirmed records from the Canadian provinces of Alberta and Manitoba.
Liodessus crotchi
Liodessus crotchi is a species of predaceous diving beetle in the family Dytiscidae, first described by Nilsson in 2001. It is known from North America, with distribution records from Labrador and Manitoba in Canada. As a member of the Bidessini tribe within Hydroporinae, it belongs to a diverse group of small diving beetles. Very little species-specific information has been published beyond taxonomic description and basic distribution.
Liodessus flavicollis
Liodessus flavicollis is a species of predaceous diving beetle (Coleoptera: Dytiscidae) described by LeConte in 1855. The species belongs to the tribe Bidessini within the subfamily Hydroporinae, a group of small diving beetles commonly found in freshwater habitats. The specific epithet flavicollis refers to the yellowish coloration of the pronotum. The genus Liodessus contains numerous small-bodied species that are often challenging to distinguish without detailed examination.
Lioporeus triangularis
Lioporeus triangularis is a species of predaceous diving beetle in the family Dytiscidae. Originally described as Hydroporus triangularis by Fall in 1917, it was later transferred to the genus Lioporeus. The species is known from North America and belongs to the subfamily Hydroporinae, a diverse group of small to medium-sized diving beetles.
Mesonoterus addendus
Mesonoterus addendus is a small diving beetle species in the family Noteridae, first described by Blatchley in 1920. The species belongs to a genus of burrowing water beetles adapted to aquatic habitats. Based on the limited available records, this species has been documented from the Caribbean and North America. The genus Mesonoterus contains species typically associated with shallow, often temporary aquatic habitats where they burrow in muddy or sandy substrates.
Mystonectes coelamboides
Mystonectes coelamboides is a small diving beetle in the family Dytiscidae, first described by Fall in 1923. It belongs to the subfamily Hydroporinae, a group of predominantly small dytiscids often associated with specialized aquatic habitats. The genus Mystonectes contains few described species and is characterized by distinctive morphological adaptations. Records of this species are sparse, with limited observational data available.
Mystonectes titulus
Mystonectes titulus is a species of diving beetle in the family Dytiscidae, subfamily Hydroporinae. It is a small predatory aquatic beetle inhabiting freshwater environments. The species was described by Leech in 1945 and is known from North America.
Nebrioporus rotundatus
Nebrioporus rotundatus is a species of diving beetle in the family Dytiscidae, occurring in North America. It belongs to a genus of small predaceous diving beetles commonly found in freshwater habitats. The species was described by LeConte in 1863 and is currently accepted as valid.
Nectoboreus
Nectoboreus is a genus of diving beetles in the family Dytiscidae, subfamily Hydroporinae. The genus was described in 2018 by Fery and Ribera based on species previously assigned to other genera, particularly within the Deronectina subtribe. Members of this genus are small to medium-sized predatory aquatic beetles. As a recently established genus, its species-level taxonomy and biology remain under investigation.
Nectoporus
Nectoporus is a genus of diving beetles (family Dytiscidae) established by Guignot in 1950. It belongs to the subfamily Hydroporinae, a diverse group of small to medium-sized predatory aquatic beetles. Members of this genus are found in freshwater habitats, primarily in the Southern Hemisphere based on available distribution records. As with other dytiscids, they are aquatic predators with adaptations for underwater life including modified hind legs for swimming.
Nectoporus crassulus
Nectoporus crassulus is a species of predaceous diving beetle (family Dytiscidae) described by Fall in 1923. It belongs to the subfamily Hydroporinae, a diverse group of small to medium-sized diving beetles. The genus Nectoporus is part of the subtribe Deronectina, which contains species primarily associated with freshwater habitats.
Neobidessus pullus
Neobidessus pullus is a small predaceous diving beetle in the family Dytiscidae. The species occurs across North America and extends into the Neotropics. Two subspecies are recognized: the nominate N. p. pullus and N. p. floridanus described from Florida. As a member of the tribe Bidessini, it inhabits aquatic environments where it functions as an active predator.
Neoclypeodytes amybethae
Neoclypeodytes amybethae is a species of predaceous diving beetle in the family Dytiscidae, described by K. B. Miller in 2001 as part of a comprehensive revision of the New World genus Neoclypeodytes. The genus contains 25 valid species distributed in western North America and northern Central America. Species in this genus are characterized by a distinctive pattern of two maculae on each elytron, which represents a possible synapomorphy supporting the monophyly of Neoclypeodytes.
Neoclypeodytes cinctellus
Neoclypeodytes cinctellus is a small predaceous diving beetle in the family Dytiscidae. It is distributed across western North America and northern Central America. The species has been documented as a predator of the critically endangered Devils Hole pupfish (*Cyprinodon diabolis*), representing a notable conservation concern. It was formerly described under the name *N. centralis* before being synonymized.
Neoclypeodytes haroldi
Neoclypeodytes haroldi is a species of predaceous diving beetle in the family Dytiscidae, described by K.B. Miller in 2001 as part of a comprehensive revision of the genus Neoclypeodytes. The genus is characterized by a distinctive pattern of two maculae on each elytron, which serves as a possible synapomorphy supporting its monophyly. N. haroldi is one of 25 recognized valid species in this western North American and northern Central American genus.
Neoclypeodytes leachi
Neoclypeodytes leachi is a species of predaceous diving beetle in the family Dytiscidae, first described by Leech in 1948. It belongs to the genus Neoclypeodytes, a group of small diving beetles within the tribe Bidessini. The species is known from North America, though specific details about its biology and ecology remain limited in published literature.
Neoclypeodytes ornatellus
Neoclypeodytes ornatellus is a small diving beetle (Coleoptera: Dytiscidae) in the tribe Bidessini. The species was described by Fall in 1917 and is part of a western North American genus characterized by distinctive elytral maculation patterns. A lectotype was designated for this species in a 2001 revision of the genus.
Neoclypeodytes quadripustulatus
A small diving beetle in the genus Neoclypeodytes, characterized by the distinctive elytral pattern of four maculae (two per elytron) that is diagnostic for the genus. The species was described by Fall in 1917 and occurs in western North America. A lectotype was designated in the 2001 revision by Young.
Neoclypeodytes roughleyi
Neoclypeodytes roughleyi is a species of small diving beetle described by K.B. Miller in 2001 during a comprehensive revision of the genus Neoclypeodytes. It is one of eleven new species described in that revision, which recognized 25 valid species in this western North American and northern Central American genus. The genus is characterized by a distinctive pattern of two maculae on each elytron, the only known synapomorphy supporting its monophyly. As a member of the Bidessini tribe within Hydroporinae, it belongs to a group of small, often overlooked aquatic beetles.
Neoporus arizonicus
Neoporus arizonicus is a species of predaceous diving beetle in the family Dytiscidae, subfamily Hydroporinae. First described by Fall in 1917 under the basionym Hydroporus arizonicus, this species is currently classified in the genus Neoporus. It is a small diving beetle known from the southwestern United States, with Arizona representing the core of its known distribution. Like other members of the Hydroporinae, it is adapted to aquatic habitats where it preys on small invertebrates.
Neoporus dilatatus
Neoporus dilatatus is a species of predaceous diving beetle in the family Dytiscidae, subfamily Hydroporinae. It is a small aquatic beetle native to North America. The species was originally described as Hydroporus dilatatus by Fall in 1917 and later transferred to the genus Neoporus. Like other members of Dytiscidae, it is adapted to life in freshwater habitats.
Neoporus gaudens
Neoporus gaudens is a small diving beetle in the family Dytiscidae, subfamily Hydroporinae. The species was described by Fall in 1923 and is currently accepted as valid. Like other members of the genus Neoporus, it is presumed to be an aquatic predator inhabiting freshwater systems. Available records indicate presence in North America, though detailed biological information remains limited.
Neoporus hebes
Neoporus hebes is a small diving beetle (family Dytiscidae) described by Fall in 1923. As a member of the subfamily Hydroporinae, it inhabits freshwater aquatic environments. The genus Neoporus comprises numerous small dytiscid species found primarily in North America. This species is among the lesser-documented members of the genus, with limited observational records available.
Neoporus hybridus
Neoporus hybridus is a diving beetle species in the family Dytiscidae, first described by Aubé in 1838. Originally placed in the genus Hydroporus, it was later transferred to Neoporus. The species belongs to the subfamily Hydroporinae, a diverse group of small to medium-sized predatory aquatic beetles. Records indicate presence in North America, though detailed biological studies appear limited in the available literature.
Neoporus lobatus
Neoporus lobatus is a species of diving beetle in the family Dytiscidae, first described by Sharp in 1882. It belongs to the subfamily Hydroporinae, a diverse group of small predatory aquatic beetles. The genus Neoporus comprises small dytiscids found primarily in North America. Like other members of its family, this species is aquatic and occupies freshwater habitats.
Neoporus shermani
Neoporus shermani is a predaceous diving beetle in the family Dytiscidae, described by Fall in 1917. It belongs to the subfamily Hydroporinae, a group of small to medium-sized diving beetles. The species is recorded from North America, though specific habitat and ecological details remain poorly documented.
Oreodytes alaskanus
Oreodytes alaskanus is a small predaceous diving beetle in the family Dytiscidae, first described by Fall in 1926. It belongs to the subfamily Hydroporinae, one of the most diverse lineages of diving beetles. The species is associated with freshwater habitats in northern North America.
Oreodytes humboldtensis
Oreodytes humboldtensis is a species of predaceous diving beetle in the family Dytiscidae, described by Zimmerman in 1985. As a member of the genus Oreodytes, it belongs to a group of small diving beetles primarily associated with running water habitats. The species epithet suggests a connection to the Humboldt region, likely referring to Humboldt County or the broader Humboldt Bay area of coastal northern California. Like other Oreodytes species, it is presumed to be an aquatic predator in freshwater systems.
Oreodytes laevis
Oreodytes laevis is a species of predaceous diving beetle in the family Dytiscidae. It is distributed across North America, with records from Canada (Alberta, British Columbia) and the United States. As a member of the Hydroporinae subfamily, it inhabits aquatic environments where it functions as an active predator.
Oreodytes snoqualmie
Oreodytes snoqualmie is a species of predaceous diving beetle in the family Dytiscidae. It was described by Hatch in 1933 and was originally placed in the genus Hydroporus. The species is known from western North America, with records from Alberta and British Columbia in Canada. As a member of the genus Oreodytes, it belongs to a group of small diving beetles typically associated with lotic (flowing water) habitats.
Pachydrus
Pachydrus is a genus of diving beetles in the family Dytiscidae, established by Sharp in 1882. The genus belongs to the tribe Pachydrini within the subfamily Hydroporinae. It contains nine described species distributed primarily in South America, with records from Colombia and surrounding regions. As with other dytiscids, members are aquatic predators inhabiting freshwater environments.
Platambus semivittatus
Platambus semivittatus is a predaceous diving beetle in the family Dytiscidae. It is native to North America with a broad geographic range spanning from the Great Lakes region to the southwestern United States. The species belongs to the genus Platambus, a group of medium-sized diving beetles commonly found in freshwater habitats.
Rhantus
Rhantus is a genus of predaceous diving beetles (Dytiscidae) comprising approximately 100 species with worldwide distribution. Members of this genus are primarily associated with lentic freshwater habitats, particularly pools and marshy wetlands. The genus is currently recognized as paraphyletic; taxonomic revision is anticipated following 2017 research that transferred 17 species to newly established genera (Nartus, Meridiorhantus, Caperhantus, and Carabdytes). Several species have independently colonized oceanic islands and undergone endemic diversification.
Rhantus sericans
Rhantus sericans is a predaceous diving beetle in the family Dytiscidae, first described by Sharp in 1882. The species is distributed across North America and has been recorded from the Holarctic region, including the Canadian province of Alberta. As a member of the genus Rhantus, it belongs to a group of diving beetles adapted to aquatic environments. The species is represented by 88 observations on iNaturalist, indicating it is documented but not exceptionally common in citizen science records.
Sanfilippodytes pseudovilis
Sanfilippodytes pseudovilis is a species of predaceous diving beetle in the family Dytiscidae. It was described by Young in 1953. The species is known from North America, with confirmed records from the Canadian provinces of Alberta and British Columbia. As a member of the Hydroporinae subfamily, it belongs to a group of small diving beetles.
Sanfilippodytes terminalis
Sanfilippodytes terminalis is a species of predaceous diving beetle in the family Dytiscidae, first described by Sharp in 1882. It is one of several species in the genus Sanfilippodytes, a group of small diving beetles within the subfamily Hydroporinae. The species is known from North America, with records from British Columbia, Canada. Like other members of its family, it is adapted to aquatic habitats.
Siettitiina
Siettitiina is a subtribe of diving beetles (family Dytiscidae) established by Smrz in 1982. It belongs to the subfamily Hydroporinae and tribe Hydroporini. The group includes the genus Iberoporus, which contains the first known stygobiont beetle species from Portugal, Iberoporus pluto, discovered in 2019. Members of this subtribe are associated with subterranean and groundwater habitats.
Thermonectus intermedius
Thermonectus intermedius is a predaceous diving beetle in the family Dytiscidae, first described by Crotch in 1873. The species is distributed in North America. As a member of the genus Thermonectus, it is an aquatic predator inhabiting freshwater environments. The genus is known for species that are active swimmers and visual hunters in aquatic habitats.
Thermonectus marmoratus
sunburst diving beetle, yellow-spotted diving beetle, spotted diving beetle
Thermonectus marmoratus is a small, brightly colored diving beetle native to southwestern North America and Mexico. Adults are distinguished by black elytra with yellow or golden spots and possess specialized adaptations for aquatic life, including air bubble storage beneath the wings for extended underwater respiration. The species is notable for its aposematic coloration warning of chemical defenses, and for the extraordinary visual system of its larvae—featuring bifocal lenses with dual retinas that constitute the first recorded instance of bifocal vision in the animal kingdom. Larvae are active predators with complex stemmata capable of near and far vision, polarization sensitivity, and behavioral scanning mechanisms to extend their narrow visual fields.
Thermonectus nigrofasciatus
Mottled Diving Beetle
Thermonectus nigrofasciatus is a diving beetle species in the family Dytiscidae, native to the eastern United States. The species name refers to the distinctive black, postmedian transverse blotch on its elytra. It is commonly known as the Mottled Diving Beetle and has been documented in over 500 observations on iNaturalist.
Thermonectus nigrofasciatus nigrofasciatus
Thermonectus nigrofasciatus nigrofasciatus is a subspecies of predatory diving beetle in the family Dytiscidae. The nominate subspecies occurs in North and Middle America. Members of the genus Thermonectus are recognized for their distinctive color patterns and aquatic lifestyle.
Uvarus lacustris
Uvarus lacustris is a small predaceous diving beetle in the family Dytiscidae, first described by Thomas Say in 1823. It belongs to the tribe Bidessini within the subfamily Hydroporinae. The species is documented from North America, with confirmed records from Canada (Ontario) and the United States. As a member of Dytiscidae, it is an aquatic predator, though specific ecological details remain poorly documented in published literature.
Vatellus mexicanus
Vatellus mexicanus is a diving beetle species in the family Dytiscidae, subfamily Hydroporinae, and tribe Vatellini. First described by Sharp in 1882, this species is distributed across Middle America and North America. As a member of the Vatellini, it belongs to a group of small to minute diving beetles often associated with riparian habitats. The genus Vatellus contains species that are typically found in tropical and subtropical regions.