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 Tetratriophtydeus myacanthus (Ueckermann) comb. nov. Triophtydeus myacanthus Ueckermann 1988 (Ueckermann and Meyer), p 22. Material examined South Africa : Kwa Zulu-Natal: three females from Citrus sp., Nkwaleni Valley (28 ° 469S, 31 ° 289E) , South Africa , 30 January 2003 , P. R . Stephen . The features of this monotypic genus also define the species. Family TYDEIDAE Kramer, 1877 Subfamily PRETYDEINAE Andre´, 1980 Genus Pretydeus Andre´, 1980 Pretydeus André 1980 , p 143 ; Kaźmierski 1996 , p 172. Type species. Lorryia keυani Marshall, 1970. Diagnosis Adults. This genus can be recognized by the prodorsum bearing four pairs of setae, including sci trichobothria, opisthosoma with 10 pairs of setae; female with six pairs of genital setae and four pairs of aggenital setae; palp chaetotaxy 6( ω )-2-2; tibia I with a solenidion, genua II , III and IV without setae, and trochanter II with a seta, femur IV not divided.