Sennertia is a genus of mites in the Chaetodactylidae family. There are more than 70 species. Some of these mites are parasites or commensals of bees, but the presence in some bees of specialized structures for carrying mites (acarinarium) indicates the mutualistic nature of the relationship of some species (Sennertia sayutara, Sennertia devincta). Most species of the genus Sennertia settle on adult bees as heteromorphic deutonymphs, but the species Sennertia vaga has no deutonymph and settle on adult bees in the eating adult stages. Reproduction and feeding occurs during resettlement. Most species occur on small carpenter bees (Ceratina) and large carpenter bees (Xylocopa) of the family Apidae. A few species (Sennertia vaga-group) are associated with Centris (Paracentris) in the Neotropics.
Distribution Sennertia are found worldwide, except for in the Antarctic. (The species Sennertia antarctica is likely erroneously named, as the species of bee it parasitizes is not found in the Antarctic).
Species There are 6 subgenera and more than 70 species. The genus was discovered by the Dutch zoologist A.K. Udemans (Anthonie Cornelis Oudemans; 1858—1943). Sennertia aldeodadi - Haitlinger, 2000 Sennertia alfkeni - Oudemans, 1900 (=Sennertia japonica (Oudemans, 1900)) Sennertia americana - Delfinado and Baker, 1976 Sennertia antarctica - Trägårdh, 1907 Sennertia argentina - Vitzthum, 1941 Sennertia augustii - Alzuet and Abrahamovich, 1990 Sennertia basilewskyi - Fain, 1974 Sennertia benoiti - Fain, 1974 Sennertia bifida - Kurosa, 2003 Sennertia bifilis - (Canestrini, 1897) Sennertia caffra - Vitzthum, 1919 Sennertia cantabrica - Zachvatkin, 1941 Sennertia capensis - Fain, 1971 Sennertia cerambycina - (Scopoli, 1763) Sennertia ceratinarum - Fain, 1974 Sennertia congoicola - Fain, 1971 Sennertia dalyi - Fain, 1980 Sennertia dalyi nilotica - Fain, 1980 Sennertia delfinadoae - Fain, 1981 (=Sennertia bakeri Ramaraju and Mohanasundaram, 2001) Sennertia devincta - Klimov and OConnor, 2007 Sennertia dissimilis - Zachvatkin, 1941 Sennertia donaldi - Turk, 1948 Sennertia duweinii - Sherbef and Duweini, 1980 Sennertia egyptiaca - Elbadry, 1971 Sennertia elseni - Fain, 1971 Sennertia faini - Baker and Delfinado-Baker, 1983 Sennertia flabellifera - Oudemans, 1924 Sennertia frontalis - Vitzthum, 1941 Sennertia gargantua - Zachvatkin, 1941 Sennertia greeni - Oudemans, 1917 Sennertia haustrifera - Klimov and OConnor, 2008 Sennertia herminae - Haitlinger, 1999 Sennertia hipposideros - Oudemans, 1902 Sennertia horrida - Vitzthum, 1912 ( equivalent to Sennertia sumatrensis Oudemans, 1924; Sennertia leucothorae Ramaraju and Mohanasundaram, 2001) Sennertia hurdi - Klimov and OConnor, 2008 Sennertia ignota - Delfinado and Baker, 1976 Sennertia indica - Delfinado and Baker, 1976 Sennertia jeanalexi - Fain, 1971 Sennertia koptorthosomae - Oudemans, 1901 Sennertia latipilis - Fain, 1974 Sennertia lauta - Klimov and OConnor, 2007 Sennertia leclercqi - Fain, 1971 Sennertia leei - Fain, 1982 Sennertia longipilis - Alzuet and Abrahamovich, 1987 Sennertia loricata - Klimov and OConnor, 2008 Sennertia lucrosa - Klimov and OConnor, 2008 Sennertia madagascarensis - Fain, 1971 Sennertia mesotrichia - Fain, 1971 Sennertia micheli - Fain, 1971 Sennertia monicae - Fain, 1971 Sennertia morstatti - Vitzthum 1914 (=Sennertia moandensis Fain, 1971) Sennertia oudemansi - Zachvatkin, 1941 Sennertia perturbans - Vitzthum, 1919 Sennertia pirata - Klimov and OConnor, 2008 Sennertia potanini - Zachvatkin, 1941 Sennertia queenslandica Womersley, 1941 Sennertia ratiocinator - Klimov and OConnor, 2007 Sennertia recondita - Klimov and OConnor, 2008 Sennertia robusta - Delfinado and Baker, 1976 (=Sennertia carpenteri Ramaraju and Mohanasundaram, 2001) Sennertia roepkei - Oudemans, 1924 Sennertia sayutara - Klimov and OConnor, 2007 Sennertia scutata - Fain, 1974 Sennertia segnis - Klimov and OConnor, 2008 Sennertia shimanukii - Baker and Delfinado-Baker, 1983 Sennertia simplex - Trägårdh, 1904 Sennertia sodalis - Klimov and OConnor, 2008 Sennertia spinifera - Fain, 1974 Sennertia splendidulae - Alzuet and Abrahamovich, 1989 Sennertia surinamensis - Fain and Lukoschus, 1971 Sennertia tanythrix - Fain, 1971 Sennertia tunisiana - Fain, 1980 Sennertia vaga - Klimov and OConnor, 2008 Sennertia vanderhammeni brevipilis - Fain, 1974 Sennertia vanderhammeni - Fain, 1974 Sennertia varicosa - Fain, 1971 Sennertia vitzthumi - Fain, 1981 Sennertia zhelochovtsevi - Zachvatkin, 1941
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