The family Ameroseiidae Evans, 1961 (Acari: Mesostigmata) includes a total of 12 valid and adequately described genera, namely Afrocypholaelaps Elsen, 1972, Ameroseiella Bregetova, 1977, Ameroseius Berlese, 1904, Asperolaelaps Womersley, 1956, Brontispalaelaps Womersley, 1956, Epicriopsis Berlese, 1916, Hattena Domrow, 1963, Kleemannia Oudemans, 1930, Neocypholaelaps Vitzthum, 1942, Pseudoameroseius
gen. n., Sertitympanum Elsen & Whitaker, 1985 and Sinoseius Bai & Gu, 1995. One of these genera includes subgenera, namely Kleemannia (Primoseius) Womersley, 1956.All genera are reviewed and re-diagnosed, and a dichotomous key is provided for their identification. Ameroseius (50 species), Kleemannia (28 species) and Neocypholaelaps (22 species) are the largest genera in the family. Ameroseiella, Kleemannia, Kleemannia (Primoseius) and Sinoseius are considered to be valid taxa and, in presented systematic classification, they are removed from synonymy with Ameroseius. The genus Pseudoameroseius
gen. n., with type species Ameroseius
michaelangeli Moraza, 2006 (from Canary Islands), is newly erected to further refine broad primary concept of Ameroseius as understood by some former authors (Karg, Bregetova). Asperolaelaps is removed from synonymy with Neocypholaelaps. Three new species are here described, namely Ameroseius
renatae
sp. n. (based on specimens from Slovakia), Kleemannia
dolichochaeta
sp. n. (from Spain) and Kleemannia
miranda
sp. n. (from U.S.A.).The following new junior synonymies are proposed: Ameroseius
apodius Karg, 1971 = Ameroseiella
macrochelae (Westerboer, 1963); Ameroseius
bregetovae Livshits & Mitrofanov, 1975 = Neocypholaelaps
favus Ishikawa, 1968; Ameroseius
chinensis Khalili-Moghadam & Saboori, 2016 = Ameroseius
guyimingi Ma, 1997; Ameroseius
crassisetosus Ye & Ma, 1993, Ameroseius
qinghaiensis Li & Yang, 2000 and Ameroseius
norvegicus Narita, Abduch & Moraes, 2015 = Ameroseius
corbiculus (Sowerby, 1806); Ameroseius
dubitatus Berlese, 1918 = Kleemannia
plumosa (Oudemans, 1902); Ameroseius
eumorphus Bregetova, 1977 and Kleemannia
potchefstroomensis Kruger & Loots, 1980 = Kleemannia
pseudoplumosa (Rack, 1972); Ameroseius
gilarovi Petrova, 1986 = Kleemannia
plumigera Oudemans, 1930; Ameroseius
imparsetosus Westerboer, 1963 = Ameroseius
georgei (Turk, 1943); Ameroseius
lanatus Solomon, 1969 and Ameroseius
fimetorum Karg, 1971 = Kleemannia
tenella (Berlese, 1916); Ameroseius
lanceosetis Livshits & Mitrofanov, 1975 = Kleemannia
pavida (C. L. Koch, 1839); Ameroseius
marginalis Fan & Li, 1993 and Ameroseius
sichuanensis Fan & Li, 1993 = Kleemannia
insignis (Bernhard, 1963); Ameroseius
pseudofurcatus Livshits & Mitrofanov, 1975 = Ameroseius
furcatus Karg, 1971; Ameroseius
stramenis Karg, 1976 and Lasioseius (Lasioseius) gracilis Halbert, 1923 = Kleemannia
delicata (Berlese, 1918); Epicriopsis
langei Livshits & Mitrofanov, 1975 and Epicriopsis
baloghi Kandil, 1978 = Epicriopsis
palustris Karg, 1971; Epicriopsis
rivus Karg, 1971 = Epicriopsis
mirabilis Willmann, 1956; Neocypholaelaps
ewae Haitlinger, 1987 ...