Dactylosternum

Dactylosternum er en slekt av biller som hører til familien vannkjær (Hydrophilidae).

Utseende 
Små til middelsstore (3-5 millimeter), blanke, ovale vannkjær. På farge er de gjerne svarte. Oversiden er fint punktert.

Levevis 
Dactylosternum-artene lever på land, gjerne mellom løvstrø og annet råtnende plantemateriale, for eksempel komposthauger.

Utbredelse 
Slekten er nært kosmopolittisk, men mangler i de nordligste områdene.

Systematisk inndeling 

 Ordenen biller, Coleoptera
 Underordenen Polyphaga
 Overfamilien vannkjær, Hydrophiloidea
 Familien vannkjær, Hydrophilidae
 Underfamilien vannkjær, Hydrophilinae
 Stamme kulevannkjær,  Sphaeridiini
 Slekten Dactylosternum Wollaston, 1854
 Dactylosternum abdominale (Fabricius, 1792) - eneste art i Europa
 Dactylosternum advectum Horn, 1890
 Dactylosternum americanum (Mulsant, 1844)
 Dactylosternum antennale d'Orchymont, 1924
 Dactylosternum arabicum J. Balfour-Browne, 1951
 Dactylosternum arrowi Knisch, 1924
 Dactylosternum auripes Fauvel, 1883
 Dactylosternum bakeri d'Orchymont, 1925
 Dactylosternum bommelanum Hebauer, 2008
 Dactylosternum bormeanum Hebauer, 2001
 Dactylosternum bryanti d'Orchymont, 1925
 Dactylosternum cacti (LeConte, 1855)
 Dactylosternum cassidaeforme (Brullé, 1835)
 Dactylosternum cayannum (Mulsant, 1844)
 Dactylosternum centrale Sharp, 1882
 Dactylosternum chrysopelma (Spangler & Perkins, 1981)
 Dactylosternum circumcinctum Fikáek, 2010
 Dactylosternum coelostomoides d'Orchymont, 1923
 Dactylosternum convexum (Castelnau, 1840)
 Dactylosternum corbetti Balfour-Browne, 1942
 Dactylosternum corporaali d'Orchymont, 1923
 Dactylosternum cycloides Knisch, 1921
 Dactylosternum dachinabadense d'Orchymont, 1923
 Dactylosternum densepunctatum d'Orchymont, 1937
 Dactylosternum depressum (Klug, 1833)
 Dactylosternum desertum Hebauer, 2001
 Dactylosternum despectum Hebauer, 2008
 Dactylosternum destructum Hebauer, 2008
 Dactylosternum detersum Hebauer, 2001
 Dactylosternum diaperinum (Klug, 1833)
 Dactylosternum dispar (Sharp, 1882)
 Dactylosternum dohertyi Balfour-Browne, 1942
 Dactylosternum dytiscoides (Fabricius, 1775)
 Dactylosternum externum (Sharp, 1887)
 Dactylosternum falsum Hebauer, 2001
 Dactylosternum fikaceki Hebauer, 2008
 Dactylosternum flavicorne (Mulsant, 1844)
 Dactylosternum fletcheri d'Orchymont, 1923
 Dactylosternum foveolatum Jayaswal, 1971
 Dactylosternum fryanum Knisch, 1924
 Dactylosternum fulgens Orchymont, 1937
 Dactylosternum grossulum (Sharp, 1882)
 Dactylosternum grouvellei Guillebeau, 1894
 Dactylosternum helleri d'Orchymont, 1925
 Dactylosternum hydrophiloides (W.S. MacLeay, 1825)
 Dactylosternum ilaganum Hebauer, 2001
 Dactylosternum illutum Hebauer, 2001
 Dactylosternum inaequale Knisch, 1921
 Dactylosternum indicum d'Orchymont, 1923
 Dactylosternum intermedium Régimbart, 1907
 Dactylosternum kanakorum Fikáek, 2010
 Dactylosternum lanipes Hebauer, 2000
 Dactylosternum latum (Sharp, 1873)
 Dactylosternum leveri Balfour-Browne, 1942
 Dactylosternum marginale (Sharp, 1876)
 Dactylosternum miraculum Knisch, 1924
 Dactylosternum montaguei Balfour-Browne, 1939
 Dactylosternum papuense Balfour-Browne, 1942
 Dactylosternum picicorne (Mulsant, 1844)
 Dactylosternum prabhaae Jayaswal, 1971
 Dactylosternum profundum Régimbart, 1907
 Dactylosternum proxime d'Orchymont, 1923
 Dactylosternum pui Jia & Feng-Long, 2002
 Dactylosternum punctigerum Knisch, 1924
 Dactylosternum pygmaeum Régimbart, 1903
 Dactylosternum rarum Knisch, 1924
 Dactylosternum riberai Fikáček, Zhao, Kobe & Grebennikov, 2020
 Dactylosternum salvazai d'Orchymont, 1925
 Dactylosternum scutellare Régimbart, 1907
 Dactylosternum subdepressum (Laporte, 1840)
 Dactylosternum sublevigatum (Mulsant, 1844)
 Dactylosternum subquadratum (Fairmaire, 1849)
 Dactylosternum subrotundum (Fabricius, 1792)
 Dactylosternum superficiale Knisch, 1925
 Dactylosternum tibiale (Sharp, 1882)
 Dactylosternum trilobatum Hebauer, 2001
 Dactylosternum vinsoni Balfour-Browne, 1954
 Dactylosternum vitalisi d'Orchymont, 1925
 Dactylosternum waigeuense Balfour-Browne, 1942

Referanser

Eksterne lenker 
 bugguide.net - bildedatabase over nordamerikanske insekter 
 Dactylosternum på GBIF 
 

Vannkjær
Biller formelt beskrevet i 1854