Tydeoid mites (Acari: Tydeidae, Edbakerellidae, Iolinidae) occurring on Citrus in southern Africa Author Ueckermann, Edward A. Author Grout, Timothy G. text Journal of Natural History 2007 2010-12-02 41 37 - 40 2351 2378 http://dx.doi.org/10.1080/00222930701589921 journal article 10.1080/00222930701589921 1464-5262 4669726 Genus Tydeus Koch 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 . Type species. Tydeus spathulatus Oudemans, 1928 sensu André (2005) . Diagnosis Adults. Kaźmierski (1989) , in agreement with André (2005) , redefined this genus as follows: opisthosoma with 10 pairs of setae ( ps included); 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 IV entire; palp chaetotaxy: 6( ω )-2-2.