Tsikovoka

Ny tsikovoka dia bibikely mamorona ny fianakaviana Dytiscidae, karazana voangory (Coleoptera) anaty rano izay misy karazana efa ho 4 000 fantatra maneran-tany. Hita any amin' ny kôntinanta rehetra izy ireo, any amin' ny faritra rehetra afa-tsy amin' ny faritra maina be. Ny ankamaroan' izy ireo dia mpiremby an-dranomamy. Mihinana azy ireo ny olona any amin' ny firenena sasany toa an' i Sina, i Vietnamy, ary i Meksika. Ny karazana tsikovoka lehibe indrindra dia ny Dytiscus latissimus, izay mety hahatratra 44 mm ny halavany, fa ny kely indrindra kosa dia manakaiky ny 1,5 mm. Ny karazana sasany dia atahorana ho lany tamingana, fa ny hafa kosa mbola mahazatra.

 Sistematika 
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Misy karazana tsikovoka 4 000 eo ho eo, mitsinjara amin' ny vondron-karazana 175. Amin' ireo dia karazana 375 mahery no hita any Eorôpa, anisan' izany ny 185 eo ho eo any Frantsa. I Amerika Avaratra dia manana karazany miisa 500.

 Zana-pianakaviana 
Mitsinjara amin' ny zana-pianakaviana folo ny karazana tsikovoka:

 Agabinae Thomson, 1867.
 Colymbetinae Erichson, 1837.
 Copelatinae Branden, 1885.
 Coptotiminae Branden, 1885.
 Dytiscinae Leach, 1815.
 Hydrodytinae Miller, 2001.
 Hydroporinae Aubé, 1836.
 Laccophilinae Gistel, 1856.
 Lancetinae Branden, 1885.
 Matinae Branden, 1885.

 Vondron-karazana 
Ireo karazana tsikovoka ireo dia mintsinjara amin' ny vondron-karazana. Inty ny lisitry ny karazana araka ny GBIF (10 Mey 2025):

 Acilius Leach, 1817
 Aethionectes Sharp, 1882
 Africodytes Biström, 1988
 Africophilus Guignot, 1948
 Agabetes Crotch, 1873
 Agabinus Crotch, 1873
 Agabus Leach, 1817
 Agametrus Sharp, 1881
 Agaporomorphus Zimmermann, 1921
 Aglymbus Sharp, 1880
 Agnoshydrus Biström, Nilsson & Wewalka, 1997
 Allodessus Guignot, 1953
 Allopachria Zimmermann, 1924
 Amarodytes Régimbart, 1900
 Amurodytes Fery & Petrov, 2013
 Andex Sharp, 1882
 Andonectes Guéorguiev, 1971
 Anginopachria Wewalka, Balke & Hendrich, 2001
 Anodocheilus Babington, 1841
 Antiporus Sharp, 1882
 Australphilus Watts, 1978
 Austrelatus Shaverdo, Hájek, Hendrich, Surbakti, Panjaitan & Balke, 2023
 Austrodytes Watts, 1978
 Barrethydrus
 Barretthydrus Lea, 1927
 Batrachomatus Clark, 1863
 Belladessus K.B.Miller & Short, 2015
 Bidessini Sharp, 1880
 Bidessodes Régimbart, 1895
 Bidessonotus Régimbart, 1895
 Bidessus Sharp, 1882
 Boreonectes (Fery & Ribera, 2018) Fery & Ribera, 2018
 Boreonectes Angus, 2010
 Borneodessus Balke, Hendrich, Mazzoldi & Biström, 2002
 Brachyvatus Zimmermann, 1919
 Brancuporus Hendrich, Toussaint & Balke, 2014
 Bunites Spangler, 1972
 Calicovatellus K.B.Miller & Lubkin, 2001
 Canthyporus Zimmermann, 1919
 Capelatus Turner & Bilton, 2015
 Caperhantus Balke, Hájek & Hendrich, 2017
 Carabdytes Balke, Hendrich & Wewalka, 1992
 Carabhudrus
 Carabhydrus Watts, 1978
 Carrhydrus
 Celina Aubé, 1837
 Chostonectes Sharp, 1880
 Clarkhydrus Fery & Ribera, 2018
 Clemnius Villastrigo, Ribera, Manuel, Millán & Fery, 2017
 Clypeodytes Régimbart, 1894
 Coelambus Thomson, 1860
 Coelhydrus Sharp, 1882
 Colymbetes Clairville, 1806
 Colymbetes Schellenberg, 1806
 Comaldessus Spangler & Barr, 1995
 Copelatus Erichson, 1832
 Copelatus Sheth, Ghate & Hájek, 2018
 Coptotomus Say, 1830
 Cretodytes Ponomarenko, 1977
 Crinodessus K.B.Miller, 1997
 Cybister Curtis, 1827
 Cybsiter
 Darwinhydrus Sharp, 1882
 Deronectes Sharp, 1882
 Derovatellus Sharp, 1882
 Desmopachria Babington, 1841
 Deuteronectes Guignot, 1945
 Deuteronectus
 Dimitshydrus Uéno, 1996
 Dyschirioides
 Dyticus Geoffroy, 1762
 Dytiscus Linnaeus, 1758
 Electruphilus Balker, Toledo & Hendrich, 2019
 Ereboporus K.B.Miller, Gibson & Alarie, 2009
 Eretes Laporte, 1833
 Etruscodytes Mazza, Cianferoni & Rocchi, 2013
 Exocelina Broun, 1886
 Fontidessus K.B.Miller & Spangler, 2008
 Geodessus Brancucci, 1979
 Gibbidessus Watts, 1978
 Glareadessus Wewalka & Biström, 1998
 Graphoderus Dejean, 1833
 Graptodytes Seidlitz, 1887
 Haideoporus Young & Longley, 1976
 Hamadiana Benetti, Short & Michat, 2019
 Hemibidessus Zimmermann, 1921
 Heroceras Guignot, 1950
 Heterhydrus Fairmaire, 1869
 Heterosternuta Strand, 1935
 Hintonia Young, 1980
 Hoperius Fall, 1927
 Hornectes Fery & Ribera, 2018
 Hovahydrus Biström, 1982
 Huxelhydrus Sharp, 1882
 Hydaticus Leach, 1817
 Hyderodes Hope, 1838
 Hydrocolus Roughley & Larson, 2000
 Hydrodessus J.Balfour-Browne, 1953
 Hydrodytes K.B.Miller, 2001
 Hydroglyphus Motschulsky, 1853
 Hydronebrius Jakovlev, 1897
 Hydropeplus Sharp, 1882
 Hydroporus Clairville, 1806
 Hydroporus Schellenberg, 1806
 Hydrotrupes Sharp, 1882
 Hydrovatus Motschulsky, 1853
 Hygrotus Stephens, 1828
 Hyphoporus Sharp, 1882
 Hyphovatus Wewalka & Biström, 1994
 Hyphydrus Illiger, 1802
 Hypodessus Guignot, 1939
 Iberonectes Fery & Ribera, 2018
 Iberoporus Castro & Delgado, 2001
 Ilybiosoma Crotch, 1873
 Ilybius Erichson, 1832
 Incomptodessus K.B.Miller & García, 2011
 Isonotus Houlbert, 1934
 Japanolaccophilus Satô, 1972
 Kakadudessus Hendrich & Balke, 2009
 Kuschelydrus Ordish, 1976
 Laccodytes Régimbart, 1895
 Laccomimus Toledo & Michat, 2015
 Lacconectus Motschulsky, 1855
 Laccophilus Leach, 1815
 Laccoporus J.Balfour-Browne, 1939
 Laccornellus Roughley & Wolfe, 1987
 Laccornis Gozis, 1914
 Laccosternus Brancucci, 1983
 Lancetes Sharp, 1882
 Laodytes Queney, Lemaire & Ferrand, 2020
 Larsonectes Fery & Ribera, 2018
 Leconectes Fery & Ribera, 2018
 Leiodytes Guignot, 1936
 Leuronectes Sharp, 1882
 Liadyxianus Prokin, Petrov, Wang & Ponomarenko, 2013
 Limbodessus Guignot, 1939
 Liodessus Guignot, 1939
 Lioporeus Guignot, 1950
 Liopterus Dejean, 1833
 Madaglymbus Shaverdo & Balke, 2008
 Matus Aubé, 1836
 Megadytes Sharp, 1882
 Megaporus Brinck, 1943
 Meladema Laporte, 1835
 Melanodytes Seidlitz, 1887
 Meridiorhantus Balke, Hájek & Hendrich, 2017
 Mesodytes Prokin, Petrov, Wang & Ponomarenko, 2013
 Metaporus Guignot, 1945
 Methles Sharp, 1882
 Microdessus Young, 1967
 Microdytes J.Balfour-Browne, 1946
 Microhydrodytes K.B.Miller, 2002
 Miodytiscus Wickham, 1911
 Morimotoa Uéno, 1957
 Mystonectes Fery & Ribera, 2018
 Napodytes Steiner, 1981
 Nartus Zaitzev, 1907
 Nebrioporus Régimbart, 1906
 Necterosoma Sharp, 1882
 Necterosoma W.J.MacLeay, 1871
 Nectoboreus Fery & Ribera, 2018
 Nectomimus Fery & Ribera, 2018
 Nectoporus Guignot, 1950
 Neobidessodes Hendrich & Balke, 2009
 Neobidessus Young, 1967
 Neoclypeodytes Young, 1967
 Neonectes J.Balfour-Browne, 1944
 Neonectes Zimmermann, 1932
 Neoporus Guignot, 1931
 Neoscutopterus J.Balfour-Browne, 1943
 Neptosternus Sharp, 1882
 Notaticus Zimmermann, 1928
 Novadessus K.B.Miller, 2016
 Onychohydrus Schaum & White, 1847
 Oreodytes Seidlitz, 1887
 Pachydrus Sharp, 1882
 Pachynectes Régimbart, 1903
 Palaeodytes Ponomarenko, 1987
 Papuadessus Balke, 2001
 Paroster Sharp, 1882
 Peschetius Guignot, 1942
 Petrodessus K.B.Miller, 2012
 Philaccolilus Guignot, 1937
 Philaccolus Guignot, 1937
 Philodytes J.Balfour-Browne, 1939
 Phreatodessus Ordish, 1976
 Platambus Thomson, 1859
 Platydytes Biström, 1988
 Platynectes Gueorguiev, 1972
 Platynectes Régimbart, 1879
 Porhydrus Guignot, 1945
 Primospes Sharp, 1882
 Procoelambus Théobald, 1937
 Prodaticus Sharp, 1882
 Pseuduvarus Biström, 1988
 Psychopomporus Jean, Telles & K.B.Miller, 2012
 Pteroporus Guignot, 1933
 Queda Sharp, 1882
 Regimbartina Chatanay, 1911
 Rhantaticus Sharp, 1880
 Rhantus Dejean, 1833
 Rhithrodytes Bameul, 1989
 Rompindessus Balke, Bergsten & Hendrich, 2017
 Sandracottus Sharp, 1882
 Sanfilippodytes Franciscolo, 1979
 Scarodytes Gozis, 1914
 Schistomerus Palmer, 1957
 Sekaliporus Watts, 1997
 Sharphydrus Omer-Cooper, 1958
 Siamoporus Spangler, 1996
 Siettitia Abeille de Perrin, 1904
 Sinodytes Spangler, 1996
 Spanglerodessus K.B.Miller & García, 2011
 Spencerhydrus Sharp, 1882
 Sternhydrus Brinck, 1945
 Sternopriscus Sharp, 1880
 Stictonectes Brinck, 1943
 Stictotarsus Zimmermann, 1919
 Stygoporus Larson & LaBonte, 1994
 Suphisellus Zimmermann, 1921
 Tassilodytes Fery & Bouzid, 2016
 Tepuidessus Spangler, 1981
 Thermonectus Dejean, 1833
 Tikoloshanes Omer-Cooper, 1956
 Tiporus Watts, 1985
 Trichonectes Guignot, 1941
 Trogloguignotus Sanfilippo, 1958
 Tyndallhydrus Sharp, 1882
 Typhlodessus Brancucci, 1985
 Uvarus Guignot, 1939
 Vatellus Aubé, 1837
 Yola Gozis, 1886
 Yolina Guignot, 1936
 Zaitzevhydrus Fery & Ribera, 2018
 Zimpherus K.B.Miller & Wheeler, 2015

 Ohabolana 

 Aza fatra-pitia tsikovoka, fandrao manenji-boantay.
 Aza mikoba-drano marivo, ka mahavery fanahy ny tsikovoka.
 Mainty ambonin' ny rano toa tsikovoka.
 Tsy misy manga noho ny voantay, fa ratsy mpilaza ka tsy nisain' ny olona ho tsikovoka.
 Toy ny tsikovova: raha manidina toa voromanga; raha mipetraka toa tavilotra.
 Tsikovoka an-dobo: matavy tsy afahy; tsindrahaka an-tatatra, mahia tsy marary.
 Tsikovoka sy fandiorano: rano no iraisana, fa ny fomba samy manana ny azy.