Agabus (beetle)
Agabus is a large genus of predatory aquatic beetles in the family Dytiscidae, proposed in 1817 by William Elford Leach and named after Agabus, an early follower of Christianity. The adult beetles are moderate-sized, 5 to 14 mm long. The genus is primarily Holarctic in distribution, with only a few species known from the Afrotropical and Neotropical realms. Three species of Agabus, namely A. clypealis, A. discicollis and A. hozgargantae are endangered according to the IUCN Red List. The division into subgenera is not widely accepted. However, a number of species groups are recognized after the works of David J. Larson and Anders N. Nilsson. The genus is probably polyphyletic or paraphyletic. In a recent study of mitochondrial DNA, Agabus was found paraphyletic with respect to several of the species groups of Platambus, a closely related genus in the tribe Agabini. Lately the taxonomy of the genus has been revised, and some groups of species were transferred from Agabus ''sensu stricto to other genera in the tribe Agabini.
Agabus contains the following species:Agabus abessinicus Agabus adpressus Aubé, 1837Agabus adustus Guignot, 1954Agabus aequabilis Agabus aequalis Sharp, 1882Agabus aeruginosus Aubé, 1838Agabus affinis Agabus africanus Pederzani & Schizzerotto, 1998Agabus ajax Fall, 1922Agabus alexandrae Ribera, Hernando & Aguilera, 2001Agabus alinae Agabus ambiguus Agabus ambulator Régimbart, 1895Agabus amnicola Agabus amoenus Solsky, 1874Agabus ancillus Fall, 1922Agabus angusi Nilsson, 1994Agabus antennatus Leech, 1939Agabus anthracinus Mannerheim, 1852Agabus approximatus Fall, 1922Agabus arcticus Agabus aubei Perris, 1869Agabus audeni Wallis, 1933Agabus austinii Sharp, 1882Agabus bakeri Agabus basalis Agabus bergi Zaitzev, 1913Agabus bicolor Agabus bifarius Agabus biguttatus Agabus biguttulus Agabus binotatus Aubé, 1837Agabus bipustulatus Agabus blatta Jakovlev, 1897Agabus brandti Harold, 1880Agabus browni Kamiya, 1934Agabus brunneus Agabus canadensis Fall, 1922Agabus caraboides Sharp, 1882Agabus cephalotes Reiche, 1861Agabus charon Wickham, 1912Agabus clavicornis Sharp, 1882Agabus clypealis Agabus colymbus Leech, 1938Agabus confinis Agabus congener Agabus congeneroides Lomnicki, 1894Agabus conspersus Agabus conspicuus Sharp, 1873Agabus corticeus Lomnicki, 1894Agabus costulatus Agabus coxalis Sharp, 1882Agabus crassipes Agabus crypticoides Régimbart, 1895Agabus debilipes Régimbart, 1899Agabus dichrous Sharp, 1878Agabus didymus Agabus dilatatus Agabus discolor Agabus disintegratus Agabus dytiscoides Régimbart, 1908Agabus elongatus Agabus erytropterus Agabus faldermanni Zaitzev, 1927Agabus falli Agabus freudei Guéorguiev, 1975Agabus friedrichi Agabus fulvaster Zaitzev, 1906Agabus fulvipennis Régimbart, 1899Agabus fuscipennis Agabus galamensis Nilsson, 1992Agabus glacialis Hochhuth, 1846Agabus glazunovi Agabus godmanni Crotch, 1867Agabus granulatus Agabus gringo Larson, 2000Agabus griseipennis LeConte, 1859Agabus guttatus Agabus heydeni Wehncke, 1872Agabus hoppingi Leech, 1942Agabus hummeli Agabus immaturus Larson, 1991Agabus inexspectatus Nilsson, 1990Agabus infuscatus Aubé, 1838Agabus inscriptus Agabus jacobsoni Zaitzev, 1905Agabus japonicus Sharp, 1873Agabus kaszabi Guéorguiev, 1972Agabus kholini Nilsson, 1994Agabus klamathensis Larson & Leech, 1989Agabus kokoosson Feng, 1936Agabus kootenai Larson, 1991Agabus labiatus Agabus laferi Nilsson, 1994Agabus lagabrunensis Schizzerotto & Fery, 1989Agabus lapponicus Agabus leptapsis Agabus lineatus Gebler, 1848Agabus lithax Riha, 1961Agabus lobonyx Guignot, 1952Agabus loeffleri Wewalka & Nilsson, 1990Agabus longissimus Régimbart, 1899Agabus luteaster Zaitzev, 1906Agabus lutosus LeConte, 1853Agabus mackenziensis Larson, 1991Agabus maderensis Wollaston, 1854Agabus mandsuricus Agabus margaretae Larson, 1975Agabus matsumotoi Satô & Nilsson, 1990Agabus melanarius Aubé, 1837Agabus moestus Agabus morosus LeConte, 1852Agabus mucronatus Agabus nebulosus Agabus nevadensis Hå.Lindberg, 1939Agabus niedzwiedzkii Lomnicki, 1894Agabus obliteratus LeConte, 1859Agabus oblongulus Fall, 1922Agabus obsoletus LeConte, 1858Agabus ommani Zaitzev, 1908Agabus pallens Poppius, 1905Agabus pallidus Omer-Cooper, 1931Agabus paludosus Agabus parvulus Lomnicki, 1894Agabus perditus Scudder, 1900Agabus perssoni Nilsson, 1992Agabus phaeopterus Agabus philippensis Agabus picotae Foster & Bilton, 1997Agabus pisobius Leech, 1949Agabus poppiusi Nilsson, 2003Agabus pseudoclypealis Scholz, 1933Agabus punctatus F.E.Melsheimer, 1844Agabus punctulatus Aubé, 1838Agabus raffrayi Sharp, 1882Agabus ragazzii Régimbart, 1887Agabus ramblae Millán & Ribera, 2001Agabus rathbuni Scudder, 1900Agabus regimbarti Zaitzev, 1906Agabus reitteri Lomnicki, 1894Agabus rottensis Nilsson, 2001Agabus rufipennis Agabus rufulus Fairmaire, 1859Agabus rumppi Leech, 1964Agabus ruwenzoricus Guignot, 1936Agabus safei Abdul-Karim & Ali, 1986Agabus sasquatch Larson, 1991Agabus semipunctatus Agabus serricornis Agabus setulosus Agabus sikhotealinensis Agabus sjostedti Régimbart, 1908Agabus slovzovi Agabus smithi Brown, 1930Agabus solskii Jakovlev, 1897Agabus strigulosus Agabus striolatus Agabus sturmii Agabus subfuscatus Sharp, 1882Agabus suoduogangi Stastný & Nilsson, 2003Agabus svenhedini Agabus taeniolatus Agabus taiwanensis Nilsson & Wewalka, 1994Agabus thomsoni Agabus tibetanus Zaitzev, 1908Agabus tristis Aubé, 1838Agabus turcmenus Guignot, 1957Agabus udege Nilsson, 1994Agabus uliginosus Agabus undulatus Agabus ungeri Agabus unguicularis Agabus uralensis Nilsson & Petrov, 2006Agabus valdiviensis Gemminger & Harold, 1868Agabus velox Leech, 1939Agabus vereschaginae Angus, 1984Agabus winkleri Agabus wollastoni Sharp, 1882Agabus xyztrus Larson, 2000Agabus yakutiae Nilsson & Larson, 1990Agabus zetterstedti Thomson, 1856Agabus zimmermanni'' Scholz, 1920