Diving-beetle
Guides
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.