Hydrachna

Genus of mites

Hydrachna

Hydrachna globosa
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Chelicerata
Class:	Arachnida
Order:	Trombidiformes
Family:	Hydrachnidae
Genus:	Hydrachna O. F. Müller, 1776

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.^[1]^[2]^[3]^[4] 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.^[4] 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.^[5]

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

References

^ "Hydrachna Report". Integrated Taxonomic Information System. Retrieved 2019-04-13.
^ "Hydrachna". GBIF. Retrieved 2019-04-13.
^ "Hydrachna Genus Information". BugGuide.net. Retrieved 2019-04-13.
^ ^a ^b Arjomandi, Elham; Zawal, Andrzej; Hajiqanbar, Hamidreza; Filip, Ewa; Szenejko, Magdalena (22 July 2019). "New record of a parasitising species of Hydrachna (Acari, Hydrachnidia) on water beetles Eretes griseus (Fabricius, 1781) (Coleoptera, Dytiscidae, Dytiscinae, Eretini)". ZooKeys (865): 31–38. Bibcode:2019ZooK..865...31A. doi:10.3897/zookeys.865.34532. PMC 6663934. PMID 31379442.
^ Davids, C. (1972). "The Water Mite Hydrachna Conjecta Koenike, 1895 (Acari, Hydrachnellae), Bionomics and Relation To Species of Corixidae (Hemiptera)". Netherlands Journal of Zoology. 23 (4): 363–429. doi:10.1163/002829673X00012. Retrieved 2 February 2024.