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 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 also gain this "immunity" after a few years of interaction.
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 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 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 Szalay, 1955 Hydrachna bulgarensis K.Viets, 1940 Hydrachna canadensis Marshall, 1929 Hydrachna comosa Koenike, 1896 Hydrachna conjecta Koenike, 1895 Hydrachna conjectoides Lundblad, 1947 Hydrachna cordata Hydrachna crenulata Marshall, 1930 Hydrachna cronebergi Koenike, 1897 Hydrachna cruenta Muller, 1776 Hydrachna curtiscutata Hydrachna danubialis Laska, 1964 Hydrachna denudata Piersig, 1896 Hydrachna distincta Koenike, 1897 Hydrachna dorsoscutata Viets & K. Hydrachna eugeni K.H.Viets, 1911 Hydrachna extorris 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
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).