Hydaticus

***Hydaticus*** er en slekt av biller og tilhører familiegruppen vannkalver.

## Utseende
Middelsstore (gjerne ca. 15 millimeter), avlangt-ovale, svarte vannkalver, ofte med gulaktige tegninger.

## Levevis
Både de voksne billene og  larvene, er  rovdyr.  Larvestadiene er i ferskvann. De voksne vannkalvene flyr godt og kan derfor påtreffes et stykke fra vannet. Vannkalvene svømmer raskt med symmetriske bevegelser, det vil si at begge beina i et par går framover og bakover samtidig.

## Utbredelse
Slekten har en holarktisk utbredelse, dessuten lever noen arter i Afrika.

## Systematisk inndeling

Oversikten følger Artsdatabankens regler og de arter som er funnet i Norge eller antas å kunne bli oppdaget her. Angitt antall funn i Norge er fra september 2020. Det er mulig å søke flere opplysninger med navnet hos Artsdatabanken eller se fullstendig utbredelse og data for en art eller gruppe hos Artskart.

* Ordenen biller, Coleoptera
** Underordenen Adephaga
*** Overfamilien Caraboidea
**** Familien vannkalver Dytiscidae Leach, 1815
***** Underfamilien kjempevannkalver, Dytiscinae Leach, 1815
****** Stammen Hydaticini Sharp, 1882
******* Slekten ***Hydaticus*** Leach, 1817
******** *[[Hydaticus aruspex]]* Clark, 1864, 16 funn i Norge
******** *[[Hydaticus continentalis]]* Balfour-Browne, 1944
******** *[[Hydaticus seminiger]]* (De Geer, 1774), 101 funn i Norge
******** *[[Hydaticus transversalis]]* (Pontoppidan, 1763), 11 funn i Norge
### Liste over arter som ikke forekommer i Norden
* *[[Hydaticus abyssinicus]]* Régimbart, 1905
* *[[Hydaticus aequabilis]]* Guignot, 1958
* *[[Hydaticus agaboides]]* Sharp, 1882
* *[[Hydaticus amydrus]]* Guignot, 1955
* *[[Hydaticus apiatus]]* Guignot, 1947
* *[[Hydaticus arabicus]]* Guignot, 1951
* *[[Hydaticus arcuatus]]* Régimbart, 1895
* *[[Hydaticus basicollis]]* Régimbart, 1905
* *[[Hydaticus batchianensis]]* Sharp, 1882
* *[[Hydaticus bengalensis]]* Régimbart, 1899
* *[[Hydaticus bihamatus]]* Aubé, 1838
* *[[Hydaticus bimarginatus]]* (Say, 1830)
* *[[Hydaticus bipunctatus]]* Wehncke, 1876
* *[[Hydaticus bitalensis]]* Guignot, 1952
* *[[Hydaticus bivittatus]]* Laporte, 1835
* *[[Hydaticus bowringii]]* Clark, 1864
* *[[Hydaticus caffer]]* Boheman, 1848
* *[[Hydaticus capicola]]* Aubé, 1838
* *[[Hydaticus chrisi]]* Nilsson, 2001
* *[[Hydaticus cinctipennis]]* Aubé, 1838
* *[[Hydaticus collarti]]* Guignot, 1948
* *[[Hydaticus concolor]]* Sharp, 1882
* *[[Hydaticus congo]]* Gschwendtner, 1938
* *[[Hydaticus consanguineus]]* Aubé, 1838
* *[[Hydaticus conspersus]]* Régimbart, 1899
* *[[Hydaticus daemeli]]* Wehncke, 1876
* *[[Hydaticus decorus]]* Klug, 1834
* *[[Hydaticus devexus]]* Trémouilles, 1996
* *[[Hydaticus dineutoides]]* Sharp, 1882
* *[[Hydaticus dintelmanni]]* Balke, Hendrich, Sagata & Wewalka, 2005
* *[[Hydaticus dorsiger]]* Aubé, 1838
* *[[Hydaticus dregei]]* Aubé, 1838
* *[[Hydaticus epipleuricus]]* Régimbart, 1891
* *[[Hydaticus exclamationis]]* Aubé, 1838
* *[[Hydaticus fabricii]]* (W.S.Macleay, 1825)
* *[[Hydaticus figuratus]]* Régimbart, 1899
* *[[Hydaticus fijiensis]]* Régimbart, 1899
* *[[Hydaticus finus]]* Watts, 1978
* *[[Hydaticus flavolineatus]]* Boheman, 1848
* *[[Hydaticus fractifer]]* Walker, 1858
* *[[Hydaticus fractivittis]]* Guignot, 1951
* *[[Hydaticus fulvoguttatus]]* Guignot, 1951
* *[[Hydaticus fulvosparsus]]* Gschwendtner, 1938
* *[[Hydaticus galla]]* Guérin-Méneville, 1849
* *[[Hydaticus grammicus]]* (Germar, 1827)
* *[[Hydaticus guignoti]]* Gschwendtner, 1938
* *[[Hydaticus histrio]]* Clark, 1864
* *[[Hydaticus humeralis]]* Régimbart, 1895
* *[[Hydaticus incertus]]* Régimbart, 1888
* *[[Hydaticus ineptus]]* Guignot, 1953
* *[[Hydaticus inexspectatus]]* Trémouilles, 1996
* *[[Hydaticus intermedius]]* Régimbart, 1895
* *[[Hydaticus interrogator]]* Mouchamps, 1957
* *[[Hydaticus jeanneli]]* Guignot, 1936
* *[[Hydaticus kadumane]]* Wewalka & Hájek, 2025
* *[[Hydaticus kolbei]]* Branden, 1885
* *[[Hydaticus laceratus]]* Régimbart, 1895
* *[[Hydaticus laetabilis]]* Régimbart, 1899
* *[[Hydaticus lateralis]]* Laporte, 1835
* *[[Hydaticus latior]]* Régimbart, 1895
* *[[Hydaticus lativittis]]* Régimbart, 1895
* *[[Hydaticus leander]]* (Rossi, 1790)
* *[[Hydaticus limnetes]]* Guignot, 1955
* *[[Hydaticus litigiosus]]* Régimbart, 1880
* *[[Hydaticus luczonicus]]* Aubé, 1838
* *[[Hydaticus macularis]]* Régimbart, 1899
* *[[Hydaticus madagascariensis]]* Aubé, 1838
* *[[Hydaticus major]]* Régimbart, 1899
* *[[Hydaticus matruelis]]* Clark, 1864
* *[[Hydaticus mexaformis]]* Wewalka, 1979
* *[[Hydaticus microdaemeli]]* Watts, 1978
* *[[Hydaticus mocquerysi]]* Régimbart, 1895
* *[[Hydaticus musivus]]* Guignot, 1952
* *[[Hydaticus natalensis]]* Guignot, 1951
* *[[Hydaticus nigritulus]]* Régimbart, 1899
* *[[Hydaticus nigrotaeniatus]]* Régimbart, 1895
* *[[Hydaticus okalehubyi]]* Balke & Hendrich, 1992
* *[[Hydaticus opaculus]]* Gschwendtner, 1933
* *[[Hydaticus orissaensis]]* Nilsson, 1999
* *[[Hydaticus ornatus]]* H.J.Kolbe, 1883
* *[[Hydaticus pacificus]]* Aubé, 1838
* *[[Hydaticus paganus]]* Clark, 1864
* *[[Hydaticus palliatus]]* Aubé, 1838
* *[[Hydaticus parallelus]]* Clark, 1864
* *[[Hydaticus peregrinus]]* Guignot, 1948
* *[[Hydaticus pescheti]]* Gschwendtner, 1930
* *[[Hydaticus petitii]]* Aubé, 1838
* *[[Hydaticus philippensis]]* Wehncke, 1876
* *[[Hydaticus piceus]]* LeConte, 1863
* *[[Hydaticus plagiatus]]* Régimbart, 1895
* *[[Hydaticus platamboides]]* Régimbart, 1889
* *[[Hydaticus platteeuwi]]* Severin, 1890
* *[[Hydaticus poecilus]]* Régimbart, 1895
* *[[Hydaticus ponticus]]* Sharp, 1882
* *[[Hydaticus propinquus]]* Guignot, 1951
* *[[Hydaticus pulcher]]* (Clark, 1863)
* *[[Hydaticus pullatus]]* Guignot, 1952
* *[[Hydaticus quadriguttatus]]* Régimbart, 1895
* *[[Hydaticus quadrivittatus]]* Blanchard, 1843
* *[[Hydaticus reductus]]* Régimbart, 1899
* *[[Hydaticus rhantaticoides]]* Régimbart, 1892
* *[[Hydaticus rhantoides]]* Sharp, 1882
* *[[Hydaticus ricinus]]* Wewalka, 1979
* *[[Hydaticus rimosus]]* Aubé, 1838
* *[[Hydaticus rivanolis]]* Wewalka, 1979
* *[[Hydaticus saecularis]]* Pederzani, 1982
* *[[Hydaticus satoi]]* Wewalka, 1975
* *[[Hydaticus scapularis]]* Guignot, 1952
* *[[Hydaticus schelkovnikovi]]* Zaitzev, 1913
* *[[Hydaticus schultzei]]* Zimmermann, 1924
* *[[Hydaticus sellatus]]* Régimbart, 1883
* *[[Hydaticus septemlineatus]]* Zimmermann, 1928
* *[[Hydaticus servillianus]]* Aubé, 1838
* *[[Hydaticus severini]]* Régimbart, 1895
* *[[Hydaticus sexguttatus]]* Régimbart, 1899
* *[[Hydaticus sobrinus]]* Aubé, 1838
* *[[Hydaticus speciosus]]* Régimbart, 1895
* *[[Hydaticus stappersi]]* Peschet, 1915
* *[[Hydaticus subfasciatus]]* Laporte, 1835
* *[[Hydaticus suffusus]]* Régimbart, 1892
* *[[Hydaticus tenuis]]* Gschwendtner, 1938
* *[[Hydaticus testudinarius]]* Régimbart, 1895
* *[[Hydaticus thermonectoides]]* Sharp, 1884
* *[[Hydaticus torosus]]* Guignot, 1947
* *[[Hydaticus tschoffeni]]* Régimbart, 1895
* *[[Hydaticus tuyuensis]]* Trémouilles, 1996
* *[[Hydaticus ugandaensis]]* Guignot, 1936
* *[[Hydaticus ussherii]]* Clark, 1864
* *[[Hydaticus vaziranii]]* Wewalka, 1979
* *[[Hydaticus verecundus]]* Clark, 1864
* *[[Hydaticus vittatus]]* (Fabricius, 1775)
* *[[Hydaticus vitticollis]]* Régimbart, 1895
* *[[Hydaticus wattsi]]* Daussin, 1980
* *[[Hydaticus xanthomelas]]* (Brullé, 1837)
* *[[Hydaticus zschokkeanus]]* (Heer, 1847)

## Referanser




## Kilder
* Fauna Europaea Web Service (2004). Kjempevannkalver Fauna Europaea version 1.1. www.faunaeur.org - utbredelsesdatabase for europeiske dyr. 

## Eksterne lenker
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