Scapulaseius asiaticus ( Evans, 1953 )

Karmakar, Krishna & Bhowmik, Sagarika, 2018, Description of eight new species and re-description of four species belonging to the family Phytoseidae (Acari: Mesostigmata) from West Bengal, India, Zootaxa 4422 (1), pp. 41-77 : 53-55

Scapulaseius asiaticus ( Evans, 1953)

( Figs 29–35 , 87–88 )

Typhlodromus asiaticus EVANS, 1953: 461.

Typhlodromus (Amblyseius) asiaticus .—NARAYANAN et al. 1960: 389.

Amblyseius asiaticus .— GUPTA, 1975: 32.

Amblyseius (Amblyseius) asiaticus .— EHARA & BHANDHUFALCK, 1977: 58.

Female (n = 10). Dorsum ( Fig. 29 ). Dorsal shield 309 (305–313), long and 193 (188–198), wide, smooth, with lateral parallel lines along the margins, with a notch at the level of R1, with marks of sigilla and seven pairs of solenostomes (gd1, gd2, gd4, gd5, gd6, gd8 and gd9); 18 pairs of dorsal setae and one pairs (r3) of sublateral setae: j1 21 (19–24), j3 19 (17–21), j4 10 (8–11), j5 10 (8–11), j6 13 (11–14), J2 12 (11–13), J5 8 (8–9), z2 17 (15–18), z4 19 (18–20), z5 11 (10–12), Z1 11 (9–12), Z4 49 (47–52), Z5 76 (73–79), s4 25 (20–30), S2 18 (17–19), S4 16 (16–17), S5 15 (14–16), r3 15 (15–16), R1 12 (10–13). All setae smooth, except setae Z4 and Z5 long and lightly serrated.

Peritreme ( Fig. 29 ). Extending forward beyond the bases of j1.

Venter ( Fig. 30 ). All shields smooth, sternal shield 56 (56–57) long and 61 (60–62) wide at level of setae ST1–ST3 and ST3–ST3 respectively, with three pairs of setae and two pairs of lyrifissures; one pair of setae (ST4) on the metasternal plates; posterior margin of sternal shield concave and indistinct. Distances between ST2–ST2 60 (60–61), ST5–ST5 57 (57–58). Two pairs of metapodal shields, primary shield 19 (18–20) long, secondary shield 12 (12–13) long. Ventrianal shield 102 (100–103) long, 78 (78–79) wide at level of ZV2 setae and 66 (65–67) wide at level of anus; two pairs of protuberances at the lateral inner margins at the level of anus, with three pairs of preanal setae, JV1, JV2 and ZV2, and one pair of large elliptical pre-anal pores. Membrane surrounding ventrianal shield with four pairs of setae: ZVl, ZV3, JV4 and JV5; the latter 27 (25–30) long, smooth.

Chelicera ( Figs 31–87 ). Fixed digit 24 (24–25) long, with 11 teeth and conspicuous pilus dentilis; movable digit 26 (26–27) long, with three backwardly-directed teeth.

Spermatheca ( Fig 32–88 ). Calyx long flared at the base of vesicle, narrow, tubular, atrium wide and with flattened major duct and distinct minor duct visible.

Legs ( Fig. 33 ). Legs IV with three smooth macrosetae with pointed tips, of the following lengths: genu 29 (27–31), tibia 23 (19–26), basitarsus 49 (47–51). Chaetotactic formula of genu II: 1 2/1, 2/0 1; genu III: 1 2/1, 2/0 1. Length of leg I 290 (285–295), leg II 232 (228–235), leg III 232 (228–235), leg IV 322 (318–325).

Male (n = 6). Dorsum. Dorsal shield 277 (275–280) long and 184 (183–185) wide, smooth, solenostomes not distinguishable; 19 pairs of setae on dorsal shield: j1 18 (16–20), j3 25 (25–26), j4 8 (6–9), j5 9 (8–10), j6 10 (10–11), J2 12 (10–14), J5 7 (5–9), z2 10 (8–12), z4 13 (12–14), z5 8 (6–10), Z1 12 (12–13), Z4 33 (30–35), Z5 55 (53–57), s4 18 (16–20), S2 11 (10–12), S4 11 (10–12), S5 8 (8–9), r3 14 (13–15), R1 10 (9–11). All setae smooth, setae j1, j3 and s4 are long and setae Z4 and Z5 longer while the other setae are comparatively shorter.

Peritreme. Extending beyond level of j1.

Venter ( Fig. 34 ). Sternogenital shield with a few lateral lines, ventrianal shield striated. Sternogenital shield with five pairs of setae and three pairs of distinguishable lyrifissures. Ventrianal shield 112 (110–113) long, 112 (110–113) wide at the level of ZV2 setae, 54 (53–55) wide at the level of anus, with three pairs of pre-anal setae, JV1, JV2, and ZV2, one pair of pores and two pairs of distinguishable lyrifissures. Unsclerotised membrane surrounding ventrianal shield with one pair of setae, JV5, at level with anal opening.

Legs. Leg IV with three smooth macrosetae of the following lengths; genu 33 (30–35), tibia 27 (26–28), basitarsus 40 (38–43). Chaetotactic formula of genu II and genu III are identical to the female. Length of leg I: 268 (260–275), leg II: 232 (228–235), leg III: 232 (228–235), leg IV: 298 (290–305).

Chelicera ( Fig. 35 ). Spermatodactyl with an elongated shaft 15 (15–16) long terminating with a wide toe, 5 long.

Specimens examined. 17 females (Acarol.lab/BCKV/5801-5809/2015), collected from wild okra, Abelmoschus moschatus (Malvaceae) at Kalyani: 22° 97' 51" N, 88° 43' 45" E, 8.75 m above mean sea level, Nadia, West Bengal on 9 January 2015; 1 female (Acarol.lab/BCKV/5810/2015) (Registration number 5765/17 deposited in the NZC, Zoological Survey of India, Kolkata, collected from Wild okra, Abelmoschus moschatus (Malvaceae) at Kalyani: 22° 97' 51" N, 88° 43' 45" E, 8.75 m above mean sea level, Nadia, West Bengal on 19 January 2015, 6 females (Acarol.lab/BCKV/5347,5349,5350/2013), collected from cotton, Gossypium hirsutum (Malvaceae) at Kalyani: 22° 97' 51" N, 88° 43' 45" E, 8.75 m above mean sea level, Nadia, West Bengal on 20 September 2013; 2 females (Acarol.lab/BCKV/8233-8234/2016), collected from Dahlia, Dahlia sp. ( Compositae ), at Mohanpur: 22° 56' 47" N, 88° 32' 5" E, 9 m above mean sea level, Nadia, West Bengal on 9 March 2016; 2 females (Acarol.lab/BCKV/8235-8236/2016) from Lantana, Lantana camara , ( Verbenaceae ) at Mohanpur: 22° 56' 47" N, 88° 32' 5" E, 9 m above mean sea level, Nadia, West Bengal on 21 September 2016; 5 females (Acarol.lab/ BCKV/5402/2012), collected from Ghetu, Clerodendrum infortunatum (Lamiaceae) , at Kalyani: 22° 97' 51" N, 88° 43' 45" E, 8.75 m above mean sea level, Nadia, West Bengal on 12 September 2012; 2 males (Acarol.lab/ BCKV/5345,5347/2013), collected from cotton, Gossypium hirsutum (Malvaceae) at Kalyani: 22° 97' 51" N, 88° 43' 45" E, 8.75 m above mean sea level, Nadia, West Bengal on 25 September 2013; 2 males (Acarol.lab/BCKV/ 5519,5443/2012), collected from bean, Dolichos sp. (Leguminoceae) at Jaguli: 22° 56' 47" N, 88° 32' 5" E, 9 m above mean sea level, Nadia, West Bengal on 29 November 2012; 1 male (Acarol.lab/BCKV/5811/2015) (Registration number 5766/17 deposited in the NZC, collected from Wild okra, Abelmoschus moschatus (Malvaceae) at Kalyani: 22° 97' 51" N, 88° 43' 45" E, 8.75 m above mean sea level, Nadia, West Bengal on 19 January 2015; 1 male (Acarol.lab/BCKV/5812/2015), collected from Wild okra, Abelmoschus moschatus (Malvaceae) at Kalyani: 22° 97' 51" N, 88° 43' 45" E, 8.75 m above mean sea level, Nadia, West Bengal on 19 January 2015

Distribution. Africa: Angola: Papadoulis et al., (2009); Asia: China, Guangdong: Chen et al. (1980); Hainan: Chen et al., (1980); Jiangxi: Zhu & Chen (1983); Wuling Mountain Region: Wu & Lan (1992); Hong Kong: Schicha (1987); India: Karnataka, Narayanan et al., (1960), West Bengal: Gupta (1970); Gupta (1975); Indonesia: Ehara (2002); Evans (1953); Malaysia: Evans (1953); Philippines: Corpuz-Raros & Garcia (1994); Schicha & Corpuz-Raros (1992); Singapore: Corpuz-Raros (1995); Sri Lanka: Moraes et al., (2004b); Thailand: Ehara & Bhandhufalck (1977); Oliveira et al., (2012); Vietnam: Nguyen et al., (2016); Europe: Cyprus: Papadoulis et al., (2009).

Remarks. Scapulaseius asiaticus ( Evans, 1953) is widely distributed in Gangetic Basin of West Bengal associated with many economic crops, forest and weed plants, and feeds on spider mites. This species is characterised by a notch at waist and an extended part the dorso-lateral shield where R1 is inserted.

Figures

FIGURES 29–35. Scapulaseius asiaticus (FEMALE). 29. DORSAL VIEW OF IDIOSOMA; 30. VENTRAL VIEW OF IDIOSOMA; 31. CHELICERA; 32. SPERMATHECA; 33. GENU, TIbIA AND bASITARSUS IV; 34. VENTRAL VIEW OF IDIOSOMA (MALE); 35. SPERMATODACTYL.

FIGURES 79–99. 79–80. Amblyseius crotalariae (GUPTA, 1977), CHELICERA, SPERMATHECA; 81–82. Amblyseius guajavae (GUPTA, 1978), CHELICERA, SPERMATHECA; 83–84. Typhlodromips syzygii (GUPTA, 1975), CHELICERA, SPERMATHECA; 85–86. Scapulaseius moraesi sp. nov.; CHELICERA, SPERMATHECA; 87–88. Scapulaseius asiaticus (EVANS, 1953), CHELICERA, SPERMATHECA; 89–91. Euseius sundarbanensis sp. nov.; CHELICERA, SPERMATHECA, SPERMATODACTYL; 92–93. Euseius astrictus SP. NOV;. CHELICERA, SPERMATHECA; 94–96. Asperoseius latericulus sp. nov.; CHELICERA, SPERMATHECA, VENTRIANAL SHIELD; 97–99. Asperoseius jujubae sp. nov., CHELICERA, SPERMATHECA, SPERMATODACTYL.