''Hydrachna'' is a genus of mites in the family

Hydrachnidae Hydrachnidae is a family of mites in the superfamily (biology), superfamily Hydrachnoidea, first defined by William Elford Leach. Description The family was defined within Hydrachnoidea. These mites may be brilliant red or orange in colour, unusu ...

, the sole genus of the family. There are more than 80 described species in ''Hydrachna''. Larvae of this genus are known to be parasites of water beetles such as '' Eretes griseus'' by attaching to the back of the thorax and abdomen. These water mite larvae are also hosts of '' Callicorixa'', '' Corixa'', '' Cymatia'' and '' Sigara'' species, although '' Sigara falleni'' has been described as "immune" to these mites, and '' Cymatia coleoptrata'' and ''

Sigara striata ''Sigara striata'' is a species of Corixidae, water boatman in the family Corixidae in the order Hemiptera.Tree of Life Web Pro ...

'' also gain this "immunity" after a few years of interaction.

Species

These 87 species belong to the genus ''Hydrachna'': * '' Hydrachna analis'' Viets & K. * '' Hydrachna approximata'' Halik, 1940 * '' Hydrachna baculoscutata'' Crowell, 1960 * '' Hydrachna batorligetiensis'' Szalay, 1953 * '' Hydrachna bilobata'' Halik, 1940 * '' Hydrachna bimaculata'' Koenike * '' Hydrachna bisignifera'' Viets & K. * ''

Hydrachna brehmi ''Hydrachna'' is a genus of mites in the family Hydrachnidae, the sole genus of the family. There are more than 80 described species in ''Hydrachna''. Larvae of this genus are known to be parasites of water beetles such as '' Eretes griseus'' by ...

'' Szalay, 1955 * '' Hydrachna bulgarensis'' K.Viets, 1940 * '' Hydrachna canadensis'' Marshall, 1929 * '' Hydrachna comosa'' Koenike, 1896 * ''

Hydrachna conjecta ''Hydrachna'' is a genus of mites in the family Hydrachnidae, the sole genus of the family. There are more than 80 described species in ''Hydrachna''. Larvae of this genus are known to be parasites of water beetles such as '' Eretes griseus'' by ...

'' Koenike, 1895 * ''

Hydrachna conjectoides ''Hydrachna'' is a genus of mites in the family Hydrachnidae, the sole genus of the family. There are more than 80 described species in ''Hydrachna''. Larvae of this genus are known to be parasites of water beetles such as '' Eretes griseus'' by ...

'' Lundblad, 1947 * ''

Hydrachna cordata ''Hydrachna'' is a genus of mites in the family Hydrachnidae, the sole genus of the family. There are more than 80 described species in ''Hydrachna''. Larvae of this genus are known to be parasites of water beetles such as '' Eretes griseus'' by ...

'' * ''

Hydrachna crenulata ''Hydrachna'' is a genus of mites in the family Hydrachnidae, the sole genus of the family. There are more than 80 described species in ''Hydrachna''. Larvae of this genus are known to be parasites of water beetles such as '' Eretes griseus'' by ...

'' Marshall, 1930 * ''

Hydrachna cronebergi ''Hydrachna'' is a genus of mites in the family Hydrachnidae, the sole genus of the family. There are more than 80 described species in ''Hydrachna''. Larvae of this genus are known to be parasites of water beetles such as '' Eretes griseus'' by ...

'' Koenike, 1897 * ''

Hydrachna cruenta ''Hydrachna'' is a genus of mites in the family Hydrachnidae, the sole genus of the family. There are more than 80 described species in ''Hydrachna''. Larvae of this genus are known to be parasites of water beetles such as '' Eretes griseus'' by ...

'' Muller, 1776 * ''

Hydrachna curtiscutata ''Hydrachna'' is a genus of mites in the family Hydrachnidae, the sole genus of the family. There are more than 80 described species in ''Hydrachna''. Larvae of this genus are known to be parasites of water beetles such as '' Eretes griseus'' by ...

'' * ''

Hydrachna danubialis ''Hydrachna'' is a genus of mites in the family Hydrachnidae, the sole genus of the family. There are more than 80 described species in ''Hydrachna''. Larvae of this genus are known to be parasites of water beetles such as '' Eretes griseus'' by ...

'' Laska, 1964 * ''

Hydrachna denudata ''Hydrachna'' is a genus of mites in the family Hydrachnidae, the sole genus of the family. There are more than 80 described species in ''Hydrachna''. Larvae of this genus are known to be parasites of water beetles such as '' Eretes griseus'' by ...

'' Piersig, 1896 * ''

Hydrachna distincta ''Hydrachna'' is a genus of mites in the family Hydrachnidae, the sole genus of the family. There are more than 80 described species in ''Hydrachna''. Larvae of this genus are known to be parasites of water beetles such as '' Eretes griseus'' by ...

'' Koenike, 1897 * '' Hydrachna dorsoscutata'' Viets & K. * '' Hydrachna eugeni'' K.H.Viets, 1911 * ''

Hydrachna extorris ''Hydrachna'' is a genus of mites in the family Hydrachnidae, the sole genus of the family. There are more than 80 described species in ''Hydrachna''. Larvae of this genus are known to be parasites of water beetles such as ''Eretes griseus'' by a ...

'' Koenike, 1897 * '' Hydrachna geographica'' Muller, 1776 * '' Hydrachna georgei'' Soar, 1908 * '' Hydrachna globosa'' (De Geer, 1778) * '' Hydrachna goldfeldi'' Thor, 1916 * '' Hydrachna guanajuatensis'' Cook * '' Hydrachna halberti'' Soar, 1908 * '' Hydrachna hamata'' Lundblad, 1947 * '' Hydrachna hesperia'' Lundblad, 1934 * '' Hydrachna heterophthalma'' Viets & K. * '' Hydrachna hormuzakii'' Husiatinschi, 1937 * '' Hydrachna hungerfordi'' Lundblad, 1934 * '' Hydrachna hutchinsoni'' Lundblad, 1934 * '' Hydrachna incognita'' (Wainstein, 1976) * '' Hydrachna inermis'' Piersig, 1895 * '' Hydrachna inversa'' Walter, 1927 * '' Hydrachna juncta'' Walter, 1926 * '' Hydrachna laceriscuta'' Lundblad, 1941 * '' Hydrachna leegei'' Koenike * '' Hydrachna levigata'' Koenike, 1897 * '' Hydrachna levis'' Williamson, 1913 * '' Hydrachna linderi'' Lundblad, 1947 * '' Hydrachna longiscutata'' * '' Hydrachna lupus'' Wainstein, 1976 * '' Hydrachna magniscutata'' Marshall, 1927 * '' Hydrachna marita'' Wainstein, 1966 * '' Hydrachna marshallae'' Lundblad, 1934 * '' Hydrachna microscutata'' Marshall, 1929 * '' Hydrachna miliaria'' Berlese, 1888 * '' Hydrachna miyazakii'' Uchida, 1937 * '' Hydrachna multipora'' Cook, 1967 * '' Hydrachna mysorensis'' Cook, 1967 * '' Hydrachna mystomirabilis'' Habeed, 1954 * '' Hydrachna neocaledonica'' Smit, 2002 * '' Hydrachna nonlamellata'' Viets & K. * '' Hydrachna novaehollandica'' * '' Hydrachna oculoscutata'' Smit, 2002 * '' Hydrachna orientalis'' Thon, 1905 * '' Hydrachna paludosa'' * '' Hydrachna palustris'' Smit, 1992 * '' Hydrachna papilligera'' K.H.Viets, 1919 * '' Hydrachna perpera'' Koenike, 1908 * '' Hydrachna piersigi'' Koenike, 1897 * '' Hydrachna processifera'' Koenike, 1903 * '' Hydrachna queenslandica'' * '' Hydrachna rectirostris'' Viets & K. * '' Hydrachna rhopaloidea'' K.H.Viets, 1942 * '' Hydrachna rotunda'' Marshall, 1930 * '' Hydrachna rubicunda'' K.H.Viets, 1930 * '' Hydrachna schneideri'' Koenike, 1895 * '' Hydrachna similans'' Marshall, 1928 * '' Hydrachna simulans'' Marshall, 1928 * '' Hydrachna sistanica'' Pesic, Smit & Saboori, 2012 * '' Hydrachna stipata'' Lundblad, 1934 * '' Hydrachna tasmanica'' Lundblad, 1947 * '' Hydrachna tchadensis'' Smit, 1994 * '' Hydrachna tenuissima'' Viets, 1935 * '' Hydrachna testudinata'' Cook * '' Hydrachna trilobata'' Viets & K. * '' Hydrachna triscutata'' Lundblad, 1947 * '' Hydrachna valida'' * '' Hydrachna ventrifissa'' Viets & K. * '' Hydrachna vulpes'' Wainstein, 1976 * '' Hydrachna williamsoni'' Soar, 1908

Species

References

Further reading