Predaceous
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.
Calathus ruficollis
Red-collared Harp Ground Beetle
Calathus ruficollis is a flightless ground beetle in the family Carabidae, distributed across western North America from the California Floristic Province to the Pacific Northwest, with introduced populations in Hawaii. The species is nocturnal and predaceous, with four recognized subspecies showing distinct geographic ranges. Phylogeographic studies indicate limited genetic structure across its range despite flightlessness, suggesting recent range expansion or dispersal by walking.
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.
Downeshelea
Downeshelea is a genus of predaceous biting midges in the family Ceratopogonidae, tribe Ceratopogonini. The genus was established by Wirth and Grogan based on the Monohelea multilineata species group and currently comprises over 60 species worldwide, with approximately 46 species in the Neotropics. Adult females are predatory, feeding primarily on adult Chironomidae, and may contribute to biological control of pest populations in agricultural settings.
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.
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 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.
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.
Stilobezzia
Stilobezzia is a genus of predaceous biting midges in the family Ceratopogonidae, comprising more than 330 described species worldwide. Adult females are predators of other small insects. Immature stages develop in aquatic and semiaquatic habitats. The genus is absent from Antarctica and some islands.