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Helichus é um género de escaravelho aquático que se pode encontrar em qualquer parte do mundo, excepto na Austrália e na Antártida . Os adultos medem, em média, 1 a 8 mm de comprimento e vivem em ambientes aquáticos ou ripícolas . As larvas , contudo, desenvolvem-se em terra, o que é incomum, e talvez mesmo único, entre as espécies de insetos aquáticos.[ 2]
Helichus anescens , Grouvelle, 1892
Helichus angulicollis , Reitter, 1887
Helichus angustatus , Grouvelle, 1896)
Helichus annandalei , Grouvelle, 1911
Helichus argentinus , Berg, 1885
Helichus asiaticus , Motschulsky, 1845
Helichus basalis , LeConte, 1852
Helichus birmanicus , Bollow, 1940
Helichus bollowi , Hinton, 1939
Helichus brasiliensis , Grouvelle, 1896
Helichus chinensis , Fairmaire, 1888
Helichus collarti , Delève, 1945
Helichus columbianus , Brown, 1931
Helichus confusus , Hinton, 1936
Helichus cordubensis , Berg, 1885
Helichus dicksoni , Waterhouse, 1878
Helichus elateroides , Grouvelle, 1896
Helichus elegans , Waterhouse, 1876
Helichus elongatus , Reitter, 1881
Helichus erichsoni , Waterhouse, 1876
Helichus eruptus , Wickham, 1911 - extinto
Helichus fastigiatus , Say, 1824
Helichus fenyosi , Reitter, 1894
Helichus formosanus , Bollow, 1940
Helichus frater , Hinton, 1939
Helichus gibbicollis , Hinton, 1939
Helichus gigas , Grouvelle, 1896
Helichus granulosus , Delève, 1974
Helichus gressitti , Hinton, 1936
Helichus hardwicki , MacLeay, 1825)
Helichus hasegawai , Satô, 1985
Helichus hintoni , Bollow, 1940
Helichus indicus , Waterhouse, 1876
Helichus inexpectatus , Delève, 1938
Helichus ivorensis , Delève, 1967
Helichus koltzei , Bollow, 1940
Helichus konoi , Bollow, 1940
Helichus lareynioides , Champion, 1923
Helichus latus , Grouvelle, 1920
Helichus lithophilus , Germar, 1824
Helichus longipes , W. Redtenbacher, 1842
Helichus opacus , Grouvelle, 1892
Helichus palpals , Hinton, 1937
Helichus parallelus , Grouvelle, 1890
Helichus puncticollis , Sharp, 1882
Helichus pusillus , Hinton, 1939
Helichus sericatus , Waterhouse, 1881
Helichus solskyi , Zaitzev, 1908
Helichus striatus , LeConte, 1852
Helichus substriatus , P.W. J. Müller, 1806
Helichus suturalis , LeConte, 1852
Helichus talpoides , Waterhouse, 1876
Helichus tenuior , Wickham, 1912 - extinto
Helichus tenuis , Champion, 1923
Helichus tonkineus , Fairmaire, 1888
Helichus triangularis , Musgrave, 1935
Helichus ussuriensis , Lafer in Lavanidov, 1980
Helichus waterhousei , Grouvelle, 1911
Helichus whiteheadi , Waterhouse, 1900
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