Colymbetinae

Members occupy diverse freshwater habitats including lakes, ponds, temporary waters, and wetlands. Specific documented habitats include Melaleuca wetlands in Australia, high-altitude lakes in Peru, and temporary waters in the Fynbos and Succulent Karoo biomes of South Africa.

Widespread across multiple continents including North America, South America, Africa, Australia, and Eurasia. Documented occurrences include south-western Australia, Peru, and the winter rainfall zone of South Africa from Namaqualand to Eastern Cape Province.

Larvae develop through three instars. Second- and third-instar larvae of some genera are characterized by a basal suture on the urogomphi combined with posteroventral secondary setae on the protarsus.

Some species have been observed to indicate high conservation value of sampled wetlands.

• diving beetles
• aquatic insects
• predaceous beetles
• freshwater invertebrates

• BugGuide
• Wikipedia
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• New records for the Peruvian high-altitude diving beetle Rhantus blancasi Guignot, 1955 (Coleoptera, Dytiscidae, Colymbetinae)
• Bunites distigma (Brullé, 1837): discovery of the second- and third-instar larvae and phylogenetic relationships within the Colymbetinae (Coleoptera: Dytiscidae)
• New records of the diving beetle Rhantus simulans Régimbart, 1908 in south-western Australia (Coleoptera, Dytiscidae, Colymbetinae)
• The phylogenetically isolated South African endemic diving beetle Caperhantus cicurius (Fabricius, 1787): redescription and range extensions (Coleoptera, Dytiscidae, Colymbetinae)
• Dytiscidae and Noteridae of Wisconsin (Coleoptera). IV. Distribution, Habitat, Life Cycle, and Identification of Species of Agabini (Colymbetinae)
• Dytiscidae and Noteridae of Wisconsin (Coleoptera). III. Distribution, Habitat, Life Cycle, and Identification of Species of Colymbetinae, Except Agabini