Bidessini
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Bidessini
Bidessini is a tribe of predaceous diving beetles within the family Dytiscidae, comprising at least 40 genera and over 630 described species. Members are small to minute aquatic beetles found across diverse freshwater habitats worldwide, with notable radiations in Australia, South America, and Madagascar. The tribe includes both surface-dwelling (epigean) and subterranean (stygobitic) species, with several genera exhibiting convergent adaptations to groundwater environments.
Bidessonotus
Bidessonotus is a genus of predaceous diving beetles in the family Dytiscidae, first described by Régimbart in 1895. The genus comprises approximately 30 described species distributed primarily in the Americas, with records from North America through Central America to northern South America. These small diving beetles inhabit freshwater environments and are members of the tribe Bidessini within the subfamily Hydroporinae. The genus was revised taxonomically by Young in 1990, who described numerous new species.
Brachyvatus
Brachyvatus is a genus of diving beetles in the family Dytiscidae, first described by Zimmermann in 1919. It belongs to the tribe Bidessini within the subfamily Hydroporinae. The genus contains at least four described species distributed in South America, with records primarily from Colombia. As with other dytiscids, members are aquatic predators.
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.
Crinodessus
Crinodessus is a monotypic genus of predaceous diving beetles in the family Dytiscidae. The genus contains a single species, Crinodessus amyae, described by K.B. Miller in 1997. This genus belongs to the tribe Bidessini within the subfamily Hydroporinae.
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.
diving-beetleaquatic-insecthigh-altitudepáramoAndesphenotypic-plasticityBidessiniHydroporinaeDytiscidaeColeopterawetlandtemporary-poolpeatlandsubantarctictaxonomymale-genitaliaCOI-barcodecryptic-speciesincipient-speciationhybridizationgeometric-morphometricsenvironmental-sentineldrought-indicatorSouth-AmericaNorth-AmericaFijiNavarino-IslandMagallanesPeruColombiaChileArgentinaBoliviaBogotáJunínCuscoHuánucoCundinamarcaSumapazPunasteppepeat-bogshallow-poolpuddlealtitude-3400-4900mL.-affinis-complexL.-bogotensis-complexL.-chilensisL.-affinisL.-obscurellusL.-noviaffinisL.-saratogaeL.-picinusL.-santarositaL.-alpinusL.-hauthiL.-rhigosL.-thespesiosGuignot-1939ZimmermannSharpLeConteSaySteinheilRégimbartBiströmMillerBalkeFranciscoloSanfilippoPederzaniNilssonYoungClarkHatchMannerheimCaseyAubéBalfour-BrowneBrinckPeschetSolierWhiteZootaxaZooKeysInsect-Systematics-&-EvolutionAnales-del-Instituto-de-la-PatagoniaPLoS-ONEGBIFiNaturalistCatalogue-of-LifeNCBI-TaxonomyBOLDBarcode-of-Life-Data-SystemCOImitochondrial-DNAphylogeographypopulation-structurerange-expansionlineagegenetic-structuresubspecieslectotypeneotypesynonymynew-speciesnew-subspeciesrevisionmorphometricsallometrybody-sizebody-shapeelytrapronotumstriaecolorationpunctationhabitusoccipital-linegenital-morphologyaedeagusparamerediagnosisidentification-keytype-localitytype-specimenetymologybionomicsnatural-historygeographic-distributiondistribution-mapNearcticNeotropicalPatagoniaCape-Horn-Biosphere-Reservedroughtclimate-changeenvironmental-changesentinel-speciesplasticityadaptationphenotypic-variationhydrological-landscapewater-permanencepoolbogAltiplanoAndeanhigh-elevationmontanealpineaquaticfreshwaterlenticloticinsectbeetleAdephagaLiodessusLiodessus 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.
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
Neoclypeodytes is a genus of small diving beetles in the family Dytiscidae, tribe Bidessini, distributed across western North America and northern Central America. The genus was revised in 2001, with 25 valid species recognized and 11 new species described. A single synapomorphy—two maculae on each elytron—supports its monophyly. Relationships to other bidessine genera remain unresolved.
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 plicipennis
Neoclypeodytes plicipennis is a predaceous diving beetle in the family Dytiscidae, first described by Crotch in 1873. It belongs to a western North American and northern Central American genus characterized by a distinctive pattern of two maculae on each elytron. A lectotype was designated for this species during the 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.
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.
Uvarus subtilis
Uvarus subtilis is a small predaceous diving beetle in the family Dytiscidae, subfamily Hydroporinae. First described by LeConte in 1852, this species is distributed across North America, with records extending to British Columbia, Canada. As a member of the tribe Bidessini, it inhabits aquatic environments where it preys on small invertebrates.
Uvarus texanus
Uvarus texanus is a predaceous diving beetle in the family Dytiscidae, first described by Sharp in 1882. The species is known from North America and is placed in the tribe Bidessini within the subfamily Hydroporinae. As a member of Dytiscidae, it is an aquatic beetle adapted to life in freshwater environments. Available information on this species is limited, with only seven documented observations in iNaturalist as of the knowledge cutoff.