''Isotoma'' is a common

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...

springtail Springtails (Collembola) form the largest of the three lineages of modern hexapods that are no longer considered insects (the other two are the Protura and Diplura). Although the three orders are sometimes grouped together in a class called Ento ...

s, the

type genus In biological taxonomy, the type genus is the genus which defines a biological family and the root of the family name. Zoological nomenclature According to the International Code of Zoological Nomenclature, "The name-bearing type of a nominal ...

of the family

Isotomidae Isotomidae is a family of elongate-bodied springtails in the order Entomobryomorpha. Genera These 109 genera belong to the family Isotomidae: * '' Aackia'' Yosii, 1966 * '' Acanthomurus'' Womersley, 1934 * '' Aggressopygus'' Potapov & Babenko, ...

, containing the following species: *'' Isotoma acrea'' Wray, 1953 *'' Isotoma agrelli'' Delamare, 1950 *'' Isotoma alaskana'' Christiansen & Bellinger, 1980 *'' Isotoma alaskensis'' Fjellberg, 1978 *'' Isotoma albella'' Packard, 1873 *'' Isotoma alpa'' Christiansen & Bellinger, 1980 *'' Isotoma anglicana'' Lubbock, 1873 *'' Isotoma arborea'' Linnaeus, 1758 *'' Isotoma arctica'' Schött, 1893 *'' Isotoma aspera'' Bacon, 1914 *'' Isotoma atkasukiensis'' Fjellberg, 1978 *'' Isotoma beta'' Christiansen & Bellinger, 1980 *'' Isotoma blufusata'' Fjellberg, 1978 *'' Isotoma brucealla'' Wray, 1953 *'' Isotoma caerulea'' Bourlet, 1839 *'' Isotoma caeruleatra'' Guthrie, 1903 *'' Isotoma canadensis'' Brown, 1932 *'' Isotoma cancellarei'' Christiansen & Bellinger, 1980 *'' Isotoma carpenteri'' Börner, 1909 *'' Isotoma christianseni'' Fjellberg, 1978 *'' Isotoma communa'' MacGillivray, 1896 *'' Isotoma creli'' Fjellberg, 1978 *'' Isotoma decorata'' (Brown, 1925) *'' Isotoma diverticulata'' Yosii, 1966 *'' Isotoma dispar'' Christiansen & Bellinger, 1988 *'' Isotoma ekmani'' Fjellberg, 1977 *'' Isotoma fennica'' Reuter, 1895 *'' Isotoma flora'' Christiansen & Bellinger, 1980 *'' Isotoma gelida'' Folsom, 1937 *'' Isotoma glauca'' Packard, 1873 *'' Isotoma gorodkovi'' Martynova, 1970 *'' Isotoma hiemalis'' Schött, 1893 *'' Isotoma inupikella'' Fjellberg, 1978 *'' Isotoma japonica'' Yosii, 1939 *'' Isotoma komarkovae'' Fjellberg, 1978 *'' Isotoma longipenna'' MacGillivray, 1896 *'' Isotoma louisiana'' Scott, 1962 *'' Isotoma lucama'' Wray, 1952 *'' Isotoma macleani'' Fjellberg, 1978 *'' Isotoma manitobae'' Fjellberg, 1978 *'' Isotoma manubriata'' MacGillivray, 1896 *'' Isotoma marisca'' Christiansen & Bellinger, 1988 *'' Isotoma marissa'' Folsom, 1937 *'' Isotoma maxillosa'' Fjellberg, 1978 *'' Isotoma melanocephala'' (Börner, 1909) *'' Isotoma monochaeta'' Kos, 1942 *'' Isotoma monta'' Christiansen & Bellinger, 1980 *'' Isotoma multisetis'' Carpenter & Phillips, 1922 *'' Isotoma nanseni'' Fjellberg, 1978 *'' Isotoma neglecta'' Schäffer, 1900 *'' Isotoma nepalica'' (Yosii, 1966) *'' Isotoma nigrifrons'' Folsom, 1937 *'' Isotoma nishihirai'' Yosii, 1965 *'' Isotoma nixoni'' Fjellberg, 1978 *'' Isotoma notabilis'' Schäffer, 1896 *'' Isotoma nympha'' Snider & Calandrino, 1987 *'' Isotoma persea'' Wray, 1952 *'' Isotoma pinnata'' Börner, 1909 *'' Isotoma propinqua'' Axelson, 1902 *'' Isotoma pseudocinerea'' Fjellberg, 1975 *'' Isotoma quadra'' Christiansen & Bellinger, 1980 *'' Isotoma randiella'' Fjellberg, 1978 *'' Isotoma riparia'' (Nicolet, 1842) *'' Isotoma sandersoni'' Wray, 1952 *'' Isotoma sensibilis'' Tullberg, 1876 *'' Isotoma spatulata'' Chamberlain, 1943 *'' Isotoma speciosa'' MacGillivray, 1896 *'' Isotoma sphagneticola'' Linnaniemi, 1912 *'' Isotoma spinicauda'' (Bonet, 1930) *'' Isotoma subaequalis'' Folsom, 1937 *'' Isotoma subviridis'' Folsom, 1937 *'' Isotoma taigicola'' Fjellberg, 1978 *'' Isotoma tariva'' Wray, 1953 *'' Isotoma tigrina'' Nicolet, 1842 *'' Isotoma torildae'' Fjellberg, 1978 *'' Isotoma tridentata'' MacGillivray, 1896 *'' Isotoma trispinata'' MacGillivray, 1896 *'' Isotoma tuckeri'' Christiansen & Bellinger, 1980 *'' Isotoma tunica'' Christiansen & Bellinger, 1980 *'' Isotoma uniens'' Christiansen & Bellinger, 1980 *'' Isotoma variodentata'' Dunger, 1982 *'' Isotoma virgata'' Yosii, 1963 *'' Isotoma viridis'' Bourlet, 1839 *'' Isotoma walkerii'' Packard, 1871 More recent study meanwhile assigns many of these taxa to other genera than ''Isotoma'', e. g. ''Desoria'', ''Parisotoma'', or ''Vertagopus''. Potapov (2001) " lists 14 valid ''Isotoma'' species for the Palearctic realm, these are in bold in the list above. The most common species in Central Europe are ''Isotoma viridis'', which dwells natural as well as disturbed habitats, while ''I. caerulea'' prefers dryer habitats, ''I. anglicana'' cooler climates, and ''I. riparia'' streambanks and coastal shorelines.

References

Springtail genera {{springtail-stub