Study on predatory mites of Aceria tristriatus (Nalepa, 1890) from Hamedan and Lorestan provinces, Western Iran Author Ahmad-Hosseini, Mohammad . Department of Plant Protection, College of Agriculture, Bu-Ali Sina University, Hamedan, Iran; E-mails: mahmad hoseini @ yahoo. com; mkhanjani @ gmail. com Author Khanjani, Mohammad . Department of Plant Protection, College of Agriculture, Bu-Ali Sina University, Hamedan, Iran; E-mails: mahmad hoseini @ yahoo. com; mkhanjani @ gmail. com Author Karamian, Roya . Department of Biology, Faculty of Science, Bu-Ali Sina University, Hamedan, Iran; E-mail: R _ karamian @ basu. ac. ir basu.ac.ir text Persian Journal of Acarology 2019 2019-04-15 8 2 125 145 journal article 10.22073/pja.v8i2.45640 2251-8169 4644893 4C425003-76FC-45EE-918E-FA17FEA2FC10 Tydeus caryae Khanjani & Ueckermann, 2003 Diagnosis (female) All dorsal setae are similar in shape, long, serrated and somewhat thick. Trichobothrium seta ( bo ) narrow and less serrated, subequal in length to ro , la , c1 , d1 and shorter than other dorsal setae. Genital shield with 6 setae. Palpal tarsus longer than cheliceral stilettos, eupathidium on palp tarsus straight, stae ba very short so that shorter than half of palp tarsus width. Female ( Figs. 15–19 ) Body oval 348–370 length (excluding gnathosoma), width 223–238 (at level of seta c2 ). Dorsum ( Fig. 15 ) – Completely striated with 13 pair setae, striations longitudinal on prodorsum, between setae c1 , striations are U shaped and between setae d1 , are V shaped, from d1 up to f1 striations are transverse. Opisthosoma caudally (from base of f1 to end of body) with striae forming an inverted “ V ”–pattern. Length of dorsal setae: bo 35–41, ro 32–40, la 33–39, ex 41–50, c1 25–27, c2 33–40, d1 35–40, e1 44 –51, f1 45–52, f2 47–52, h1 45–51, h2 43–50, ps1 27–30. Distances between dorsal setae: ro -ro 22–29, la -la 95–110, bo -bo 60–71, c1-c1 69–80, c2-c2 195– 210, d1-d1 52–58, e1-e1 115–126, f1-f1 25–32, f2-f2 73–80, h1-h1 26–30, h2-h2 58–62, ps1-ps1 25–29. Lyrifissures ia and im in dorsal (posteriorly to c2 and anterior of e1 ) and ih in ventral surface (posterior to anal opening) of hysterosoma . Venter – Ventral cuticle and coxisternal shields striated, striations between pt setae longitudinal, between pt up to mtα transverse and between mtα up to mtβ are longitudinal ( Fig. 18 ). Lengths of ventral setae: 1b 28–31, 1c 27–29, 2a 25–28, 3b 31–34, 3c 25–28, 3d 25–27, 4b 24–26, pt 27–31, mtα 17–19, mtβ 17–20, ag1 15–17, ag2 15–17, ag3 14-16, ag4 16–18, ps3 21–23. Gnathosoma – Not visible completely from above. Subcapitulum with striae oblique, Sc1 8– 10, Sc2 29–33. Palpal femur-genu: length 29, width 12. Palp distally with eupathidium ( pζ ) straight, 7 long. Palp chaetotaxy (6+ ω –1–2) ( Fig. 17 ). Cheliceral stiletto 18 shorter than palpal tarsus 20–21 ( Fig. 16 ). Legs measurements from trochanter to tarsus (excluding pretarsus): leg I 202–213; leg II 183–194; leg III 193–208, leg IV 210–225; coxa I with a coxal organ ( cg ) stretched circle shape. Measurements: tarsus + apotele I length/width: 72/13. Length of setae on tarsus I: ft’ζ 20–23, ft ” ζ 28–32, tc’ζ 18–20, tc”ζ 33–36, ωI 5 ( Fig. 19 ). Tarsus II with small solenidion not easily to visible, ωII 1 long. Remarks This redescription resembles original description by Khanjani and Ueckermann (2003) , except that length of some dorsal setae (such as c1 , c2 , f2 ) in our study is shorter than original description. Material examined Figures 15–17. Tydeus caryae ( Khanjani & Ueckermann, 2003 ) (Adult female) – 15. Dorsal view of idiosoma; 16. Cheliceral stiletto and palpal tarsus; 17. Palp. Hamedan province : Heydareh village – 6 Oct. 2016 (n = 4) , 26 Oct. 2015 (n = 8) , 9 Oct. 2016 (n = 10), 29 Oct. 2016 (n = 2), 23 Aug. 2016 (n = 16), 13 Sep. 2017 (n = 7); Shahrestaneh village – 17 Oct. 2016 (n = 5) , 15 Aug. 2017 (n = 3) ; Ganjnameh – 18 Sep. 2015 (n = 11) ; Asadabad – 9 Sep. 2016 (n = 3) , 7 Sep. 2017 (n = 12) ; Hamedan vicinity – 19 Aug. 2015 (n = 6) , 8 Sep. 2016 (n = 6) ; Faculty of Agriculture of Bu-Ali Sina University – 13 Sep. 2014 (n = 6) , 17 Oct. 2015 (n = 8) , 17 Sep. 2016 (n = 3), 4 Aug. 2017 (n = 11); Divin village – 31 Aug. 2016 (n = 5) , 15 Nov. 2016 (n = 6) ; Sarab Gamasiab – 10 Aug. 2016 (n = 6) ; Bahar vicinity – 21 Sep. 2014 (n = 5) , 2 Aug. 2017 (n = 8) ; Abshineh village – 2 Oct. 2015 (n = 9) , 1 Nov. 2015 (n = 6) , 11 Sep. 2017 (n = 5); Velashjerd village – 5 Sep. 2017 (n = 4) . Lorestan province : Kahman canyon – 13 Oct. 2015 (n = 5) ; Aleshtar county – 4 Sep. 2015 (n = 4) ; Robatnamaki village – 10 Aug. 2016 (n = 12) ; Kakareza village – 25 Sep. 2016 (n = 5).