Phytoseiidae of Thailand (Acari: Mesostigmata), with a key for their identification Author Oliveira, Daniel C. Author Charanasri, Vatana Author Kongchuensin, Manita Author Konvipasruang, Ploychompoo Author Chandrapatya, Angsumarn Author De, Gilberto J. text Zootaxa 2012 3453 1 24 journal article 10.5281/zenodo.282177 68f76539-8e5c-4967-a480-14d2d8e46637 1175-5326 282177 Euseius nicholsi (Ehara & Lee) Amblyseius ( Amblyseius ) nicholsi Ehara & Lee, 1971 : 67 ; Ehara & Bhandhufalck, 1977 : 61 ; Wu, 1984: 224. Euseius nicholsi .— Wu et al ., 1997b : 115 ; Moraes et al ., 1986 : 49 ; 2004b: 75; Chant & McMurtry, 2005a : 215 ; 2007: 121. Specimens examined. Six females and two males, on Ziziphus mauritiana Lam. , at Ratchaburi Province, April 1995 . Female Dorsal shield 331 (320–345) long and 254 (235–264) wide; j1 29 (26–31), j3 25 (24–25), j4 11 (10–13), j5 11 (10–13), j6 14 (12–15), J2 16 (14–18), J5 7 (5–8), z2 19 (17–20), z4 21 (19–22), z5 12 (10–13), Z1 15 (14–16), Z4 16 (14–17), Z5 58 (48–61), s4 34 (28–35), S2 21 (18–25), S4 25 (22–26), S5 27 (23–30), r3 15 (12–17), R1 14 (13–15); distances between St1-St3 57 (52–59), St2-St2 67 (65–68), St5-St5 77 (70–83); ventrianal shield 101 (95–109) long, 52 (47–56) wide at level of ZV2 , 76 (72–80) at anus level; calyx of spermatheca 7 (6–8) long; fixed cheliceral digit 24 (23–24) long, movable cheliceral digit 24 (23–25) long; Sge II 20 (18–22), Sge III 28 (23–32), Sti III 23 (21–24), Sge IV 45 (41–48), Sti IV 33 (31–35), St IV 54 (47–56). Chaetotaxy: genu II 2 , 2/0-2/0, 1; genu III 1 , 2/1-2/0, 1. Male Dorsal shield 230–240 long and 183–185 wide; j 1 26–28, j 3 26–29, j 4 11–12, j 5 11–12, j 6 13–14, J 2 13–15, J5 5–6, z 2 20–22, z 4 24–25, z 5 12–14, Z 1 13–14, Z4 16, Z5 48–50, s4 32 –34, S 2 21 –22, S 4 23 –24, S 5 25 –27, r 3 16–18, R 1 12–15; ventrianal shield 95–100 long and 130–150 wide at level of anterior corners; fixed cheliceral digit 19 long, movable cheliceral digit 20 long; spermatodactyl L-shaped, shaft 17–18 long, foot 10–12 long; Sge II 19, Sge III 24–25, Sge IV 38–39, Sti IV 29–34, St IV 45–48. Chaetotaxy of genua II and III as in female. Previous records. China , Hong Kong and Thailand (Provinces of Nakhon Pathom, Pathum Thani and Phra Nakhon Si Ayutthaya, Ehara & Bhandhufalck, 1977 ). Remarks. The females examined are slightly smaller than the holotype (dorsal shield about 10% shorter) and the larger setae are correspondingly shorter than reported for the holotype . The metapodal platelets of some specimens are similar to those reported in the original description (with a lateral appendix, probably because of the partial fusion of the two platelets of each side); however, other specimens have platelets with a wavy margin where fusion with smaller platelet could have occurred. Likewise, the males examined are smaller (dorsal shield about 15% shorter) than those reported by Wu (1984) and Wu et al . (1997b) , the larger setae being also shorter (seta Z1 about 40% shorter).