Tydeus Koch 1836 , p 11 Brachytydeus Thor 1933 , p 54 Calotydeus Oudemans 1937 , p 923 Orthotydeus André 1980 , p 127 Tydeoid mites (Acari: Tydeidae, Edbakerellidae, Iolinidae) occurring on Citrus in southern Africa Ueckermann, Edward A. Grout, Timothy G. Journal of Natural History 2007 2010-12-02 41 37 - 40 2351 2378 Koch Koch [615,781,935,959] Arachnida Tydeidae Tydeus Animalia Prostigmata 12 2362 Arthropoda genus    Tydeus Koch 1836, p 11–12; Oudemans 1937, p 922 (in part); Kaźmierski 1989, p 292 (in part).  Brachytydeus Thor 1933, p 54(in part).   Calotydeus Oudemans 1937, p 923(in part).   Orthotydeus André 1980, p 127.    Typespecies.  Tydeus spathulatus Oudemans, 1928sensu André (2005).  Diagnosis  Adults. Kaźmierski (1989), in agreement with André (2005), redefined this genus as follows: opisthosoma with 10 pairs of setae ( psincluded); poroidotaxy: three; genital organotaxy, adults: no eugenital setae in female but four pairs in male, four or six pairs of genital and four pairs of aggenital setae in both adults; coxa I with coxal organ; chaetotaxy of leg segments: 8( ω)-6( ω)-5-5, tibiae 4-2-2-2, genua 3-2-1-1, femora 3-2-1-1, trochantera 1-0-1-0, epimeral formula, adults: 3-1-4-2; solenidiotaxy: two, femur IVentire; palp chaetotaxy: 6( ω)-2-2.