Orectochilus

Orectochilus er en slekt av biller i underordenen Adephaga. familien virvlere.  De har todelte fasettøyne, den ene delen er tilpasset å se i vann, den andre til å se i luft. Når farer dukker opp kan de både dykke og gjøre hopp over vannoverflaten.


== Utseende ==
Forholdsvis små og spinkle, blanke, ofest mørkfargede virvlere. Slekten utmerker seg ved at kroppen er fint hårete, i alle fall på sidene. Kroppsformet er avlangt oval.


== Levevis ==
Virvlene er rovdyr og spiser insekter som faller ned på vannoverflaten. Disse billene opptrer gjerne i grupper som svømmer rundt på vannoverflaten, og kan minne om radiobiler i et tivoli. Dersom de blir truet dykker de og gjemmer seg nær bunnen. Om en virvler blir fanget, skiller den ut et illeluktende stoff. Dette gjør billen usmakelig for rovdyr og virker også som et alarmstoff overfor andre virvlere.


== Utbredelse ==
Slekten er utbredt i Palearktis og Sørøst-Asia.


== Systematisk inndeling / norske arter ==

Ordenen biller, Coleoptera
Underordenen Adephaga
Familien virvlere, Gyrinidae Latreille, 1810
Underfamilien Gyrininae Latreille, 1810
Stammen Orectochilini Régimbart, 1882
Slekten Orectochilus Dejean, 1833
Orectochilus villosus (Müller, 1776) – spredte funn i Sør-Norge


=== Liste over øvrige arter ===
Orectochilus acuductus Régimbart, 1907
Orectochilus acutilobus Régimbart, 1907
Orectochilus aeneipennis Régimbart, 1907
Orectochilus afghanus Ochs, 1955
Orectochilus africanus Ochs, 1923
Orectochilus agilis Sharp, 1884
Orectochilus agnatus Ochs, 1937
Orectochilus ahlwarthi Ochs, 1957
Orectochilus alienus Ochs, 1933
Orectochilus andamanicus Régimbart, 1884
Orectochilus angulatus Régimbart, 1882
Orectochilus angusticinctus Régimbart, 1907
Orectochilus annandalei Ochs, 1925
Orectochilus apicalis Régimbart, 1891
Orectochilus archipelagensis Ochs, 1953
Orectochilus argenteolimbatus Peschet, 1923
Orectochilus assequens Ochs, 1936
Orectochilus assimilis Ochs, 1957
Orectochilus baeri Régimbart, 1886
Orectochilus bakeri Ochs, 1924
Orectochilus bataviensis Régimbart, 1907
Orectochilus bicolor Ochs, 1957
Orectochilus biformis Ochs, 1937
Orectochilus bipartitus Régimbart, 1882
Orectochilus birmanicus Régimbart, 1891
Orectochilus boettcheri Ochs, 1937
Orectochilus brevidens Ochs, 1940
Orectochilus brevitarsis Falkenström, 1934
Orectochilus brincki Ochs, 1948
Orectochilus caliginosus Régimbart, 1907
Orectochilus cameroni Ochs, 1925
Orectochilus cardiophorus Régimbart, 1888
Orectochilus cardoni Régimbart, 1892
Orectochilus castaneus Régimbart, 1907
Orectochilus castetsi Régimbart, 1892
Orectochilus cavernicola Ochs, 1925
Orectochilus celebensis Régimbart, 1907
Orectochilus chalceus Ochs, 1936
Orectochilus chinensis Régimbart, 1892
Orectochilus choprai Ochs, 1925
Orectochilus coimbatorensis Ochs, 1925
Orectochilus compressus Sturm, 1826
Orectochilus conspicuus Régimbart, 1882
Orectochilus coomani Peschet, 1925
Orectochilus cordatus Régimbart, 1888
Orectochilus corniger Zaitzev, 1910
Orectochilus corporaali Peschet, 1922
Orectochilus corpulentus Régimbart, 1884
Orectochilus crassipes Régimbart, 1884
Orectochilus cribratellus Régimbart, 1891
Orectochilus cuneatus Régimbart, 1892
Orectochilus cupreolus Régimbart, 1907
Orectochilus cylindricus Régimbart, 1892
Orectochilus dehiscens Régimbart, 1907
Orectochilus depressiusculus Ochs, 1940
Orectochilus desgodinsi Régimbart, 1886
Orectochilus dilatatus Redtenbacher, 1868
Orectochilus discifer Walker, 1859
Orectochilus discus Aubé, 1838
Orectochilus dispar Régimbart, 1907
Orectochilus distinguendus Ochs, 1942
Orectochilus divergens Régimbart, 1907
Orectochilus drescheri Ochs, 1937
Orectochilus dulitensis Ochs, 1928
Orectochilus dulitensis Ochs, 1932
Orectochilus eberti Ochs, 1966
Orectochilus emmerichi Falkenström, 1936
Orectochilus fairmairei Régimbart, 1884
Orectochilus fallax Peschet, 1923
Orectochilus feae Régimbart, 1888
Orectochilus ferruginicollis Régimbart, 1907
Orectochilus figuratus Régimbart, 1892
Orectochilus fletcheri Ochs, 1925
Orectochilus florensis Régimbart, 1892
Orectochilus foersteri Ochs, 1957
Orectochilus formosanus Takizawa, 1931
Orectochilus fraternus Régimbart, 1884
Orectochilus fruhstorferi Régimbart, 1907
Orectochilus fusiformis Régimbart, 1892
Orectochilus gangeticus Wiedemann, 1821
Orectochilus gestroi Régimbart, 1882
Orectochilus grandipes Ochs, 1936
Orectochilus haemorrhous Régimbart, 1892
Orectochilus helferi Ochs, 1940
Orectochilus himalayensis Vazirani, 1984
Orectochilus hirtellus Ochs, 1940
Orectochilus horni Ochs, 1933
Orectochilus indicus Régimbart, 1884
Orectochilus indulans Severin, 1892
Orectochilus jaechi Mazzoldi, 1998
Orectochilus javanus Aubé, 1838
Orectochilus jilanzhui Mazzoldi, 1998
Orectochilus kempi Ochs, 1925
Orectochilus kinabaluensis Ochs, 1937
Orectochilus klapperichi Ochs, 1942
Orectochilus klynstrai Ochs, 1927
Orectochilus landaisi Régimbart, 1892
Orectochilus laticinctus Régimbart, 1907
Orectochilus latimanus Régimbart, 1907
Orectochilus leucophthalmus Fröhlich
Orectochilus limbatus Régimbart, 1884
Orectochilus longulus Régimbart, 1907
Orectochilus lucidus Régimbart, 1882
Orectochilus lumbaris Ochs, 1940
Orectochilus malaisei Ochs, 1940
Orectochilus marginepennis Aubé, 1838
Orectochilus matruelis Régimbart, 1907
Orectochilus melli Ochs, 1925
Orectochilus metallicus Régimbart, 1884
Orectochilus mimicus Ochs, 1936
Orectochilus minusculus Ochs, 1936
Orectochilus mjobergi Ochs, 1928
Orectochilus mjobergianus Falkenström, 1934
Orectochilus murinus Régimbart, 1892
Orectochilus murudensis Ochs, 1928
Orectochilus musculus Ochs, 1940
Orectochilus nathani Ochs, 1966
Orectochilus neglectus Ochs, 1925
Orectochilus nigricans Régimbart, 1892
Orectochilus nigroaeneus Régimbart, 1907
Orectochilus nipponensis Zaitzev, 1910
Orectochilus nitens Peschet, 1923
Orectochilus nuristanicus Ochs, 1955
Orectochilus oberthueri Régimbart, 1884
Orectochilus oblongiusculus Régimbart, 1886
Orectochilus obscuriceps Régimbart, 1907
Orectochilus obtusangulus Régimbart, 1907
Orectochilus obtusipennis Régimbart, 1892
Orectochilus orbisonorum
Orectochilus orissaensis Vazirani, 1958
Orectochilus ornaticollis (Dejean, 1866)
Orectochilus oxygonus Régimbart, 1907
Orectochilus palawanensis Régimbart, 1907
Orectochilus palliatus Dejean, 1833
Orectochilus panoembanganus Ochs, 1940
Orectochilus patellimanus Régimbart, 1907
Orectochilus pendleburyi Ochs, 1932
Orectochilus pescheti Ochs, 1957
Orectochilus pfisteri Ochs, 1927
Orectochilus philippinarum White, 1847
Orectochilus pilosellus Ochs, 1940
Orectochilus planatus Ochs, 1937
Orectochilus planiusculus Ochs, 1937
Orectochilus procerus Régimbart, 1884
Orectochilus productus Régimbart, 1884
Orectochilus pubescens Régimbart, 1882
Orectochilus pulchellus Régimbart, 1884
Orectochilus punctilabris Régimbart, 1907
Orectochilus punctipennis Sharp, 1884
Orectochilus punctulatus Régimbart, 1886
Orectochilus pusillus Régimbart, 1882
Orectochilus regimbarti Sharp, 1884
Orectochilus ribeiroi Vazirani, 1958
Orectochilus ritsemae Régimbart, 1882
Orectochilus rivularis Régimbart, 1884
Orectochilus ruficaudatus Ochs, 1940
Orectochilus samarensis Ochs, 1929
Orectochilus scalaris Régimbart, 1880
Orectochilus schillhammeri Mazzoldi, 1998
Orectochilus schultzei Ochs, 1924
Orectochilus sculpturatus Régimbart, 1884
Orectochilus seminitens Ochs, 1937
Orectochilus semivestitus Guérin-Meneville, 1840
Orectochilus severini Régimbart, 1892
Orectochilus similis Ochs, 1929
Orectochilus sinhalensis Ochs, 1937
Orectochilus spiniger Régimbart, 1880
Orectochilus spinosus Zimmermann, 1917
Orectochilus staudingeri Régimbart, 1907
Orectochilus strandi Ochs, 1936
Orectochilus striolifer Régimbart, 1907
Orectochilus sublineatus Régimbart, 1892
Orectochilus subsinuatus Ochs, 1928
Orectochilus sulcipennis Régimbart, 1892
Orectochilus sutteri Ochs, 1953
Orectochilus teranishii Kamiya, 1933
Orectochilus tibialis Ochs, 1940
Orectochilus timorensis Régimbart, 1907
Orectochilus tomentosus Régimbart, 1891
Orectochilus tonkinensis Régimbart, 1892
Orectochilus trianguliger Régimbart, 1888
Orectochilus undulans Régimbart, 1892
Orectochilus validus Régimbart, 1882
Orectochilus velatus Ochs, 1940
Orectochilus vestitus Sturm, 1843
Orectochilus villosovittatus Régimbart, 1891
Orectochilus vitalisi Peschet, 1923
Orectochilus volubilis Ochs, 1929
Orectochilus wangi Mazzoldi, 1998
Orectochilus waterstradti Ochs, 1940
Orectochilus wehnckei Régimbart, 1884
Orectochilus wui Ochs, 1932
Orectochilus yayeyamensis Satô, 1971
Orectochilus zeravschanicus Glasunow, 1893


== Kilder ==
Ødegaard, F., Hanssen, O. og Dolmen, D. 1996. Coleoptera, Biller. I: Aagaard, K. og Dolmen, D. (red.): Limnofauna norvegica. Side 151-167.


== Eksterne lenker ==
(en) Orectochilus i Encyclopedia of Life 
(en) Orectochilus i Global Biodiversity Information Facility 
(no) Orectochilus hos Artsdatabanken 
(sv) Orectochilus hos Dyntaxa 
(en) Orectochilus hos Fauna Europaea 
(en) Orectochilus hos ITIS 
(en) Orectochilus hos NCBI 
(en) Kategori:Orectochilus – bilder, video eller lyd på Wikimedia Commons 
Orectochilus – detaljert informasjon på Wikispecies