Amblyseius guajavae Gupta, 1978

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 : 45-47

Amblyseius guajavae Gupta, 1978

( Figs 8–14 , 81–82 )

Amblyseius guajavae GUPTA, 1978 : 63.

Amblyseius (Typhlodromips) guajavae .—GUPTA, 1986: 166; 1987A: 61; 1995: 36.

Female (n = 10). Dorsum ( Fig. 8 ). Dorsal shield 329 (323–335) long and 199 (193–205) wide, elliptical in shape, smooth, with marks of sigilla, a few lateral lines on prodorsum, slightly concave at the waist region and with seven pairs of solenostomes (gd1, gd2, gd4, gd5, gd6, gd8 and gd9); 17 pairs of setae on the dorsal shield and two pairs of setae on the unsclerotised cuticle: j1 24 (22–25), j3 37 (33–40), j4 7 (6–8), j5 8 (7–9), j6 11 (10–12), J2 11 (11–12), J5 8 (7–9), z2 11 (10–12), z4 11 (9–12), z5 7 (7–8), Z1 10 (9–11), Z4 63 (58–68), Z5 85 (80–90), s4 61 (55–66), S2 12 (12–13), S4 10 (9–11), S5 8 (7–9), r3 14 (13–15), R1 9 (9–10). All setae smooth except setae Z4 and Z5 which are lightly serrated, setae j1, j3, are long and setae s4, Z4 and Z5 are longer.

Peritreme ( Fig. 8 ). Extending forward beyond bases of j1 with two parallel rows of microtubercles.

Venter ( Fig. 9 ). All shields smooth. Sternal shield with 63 (63–64) long and 79 (77–80) 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 distinct metasternal plate with a pairs of conspicuous lyrifissures; posterior margin of sternal shield wavy with posterior tooth like projections and clearly outlined in all specimens. Distances between ST2–ST2 69 (68–70), ST5–ST5 66 (65–67). Two pairs of metapodal shields, primary shield 18 (17–19) long and secondary shield 10 (10–11) long. Ventrianal shield 115 (113–116) long, 79 (78–80) wide at level of ZV2 setae and 74 (73–75) wide at level of anus; with three pairs of pre-anal 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 33 (28–38) long, smooth.

Chelicera ( Figs 10 , 81 ). Fixed digit 27 (26–28) long, with ten teeth; movable digit 29 (28–30), with three backwardly-directed teeth.

Spermatheca ( Figs 11 , 82 ). Calyx of spermatheca thick and cigar-shaped 17 (16–19) long, atrium kidneyshaped with distinct major and minor duct.

Legs ( Fig. 12 ). Legs IV with three smooth macrosetae pointed distally and of the following lengths: genu 56 (53–58), tibia 36 (33–40), basitarsus 73 (68–78). Chaetotactic formula of genu II: 1 2/1, 2/0 1; genu III: 1 2/0, 2/1 1. Length of leg I: 327 (323–330), leg II: 277 (275–280), leg III: 279 (277–280), leg IV: 375 (365–385).

Male (n = 7). A lightly sclerotised mite with 19 pairs of dorsal setae. Idiosomal setal pattern: 10A: 9B/ JV –3,4: ZV –1,3.

Dorsum. Dorsal shield 254 (245–263) long and 172 (168–175) wide, smooth with 19 pairs of setae on dorsal shield: j1 16 (16–17), j3 29 (28–30), j4 6 (6–7), j5 7 (5–8), j6 10 (8–12), J2 10 (9–11), J5 6 (5–7), z2 9 (9–10), z4 11 (9–12), z5 6 (5–7), Z1 9 (7–10), Z4 39 (38–40), Z5 47 (44–50), s4 36 (35–37), S2 10 (8–12), S4 7 (6–8), S5 7 (6–8), r3 12 (10–13), R1 9 (7–10). All setae smooth, except Z4 and Z5 serrated.

Peritreme. Extending to level of j1.

Venter ( Fig. 13 ). Sternogenital shield with a few lateral lines, posterior part densely lined, ventrianal shield striated. Sternigenital shield with five pairs of setae and three pairs of distinguishable lyrifissures. Ventrianal shield 109 (108–110) long, 107 (105–108) 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 large pores. Unsclerotised membrane surrounding ventrianal shield with one pair of setae, JV5 24 (22–25) long at level of anal opening.

Legs. Leg IV with three smooth macrosetae pointed at the tip and of following lengths; genu 32 (32–33), tibia 22 (21–23), basitarsus 47 (45–48). Chaetotactic formula of genu II: 1 2/1, 2/0 1; genu III: 1 2/1, 2/0 1. Length of leg I: 248 (240–255), leg II: 220 (210–230), leg III: 217 (208–225), leg IV: 289 (280–297).

Chelicera ( Fig. 14 ). Spermatodactyl with an elongated shaft 16 (16–17) long terminating with a wide toe, 5 (5–6) long.

Specimens examined. 1 female, Registration number 5759/17 deposited in the NZC, Zoological Survey of India, Kolkata, collected from Jatropha, Jatropha curcas (Euphorbiaceae) , 3 females (Acarol.lab/BCKV/8170- 8172/2016), collected from Jatropha, Jatropha curcas (Euphorbiaceae) , 1 female (Acarol.lab/BCKV/8189/2016), collected from Gamari, Gmelina arborea ( Verbenaceae ) at Raja Bhatkhawa: 26°61´60" N, 89°53´24" E, 221 m above mean sea level, Alipurduar, West Bengal on 14 December 2016; 6 females (Acarol.lab/BCKV/8174-8179/ 2016), collected from Amra, Spondias pinnata (Anacardiaceae) 1 female (Acarol.lab/BCKV/8182/2016), from Jute, Corchorus capsularis (Tiliaceae) and 1 female, Registration number 5760/17 deposited in the NZC, Zoological Survey of India, Kolkata, collected from Croton, Codiaeum variegatum (Euphorbiaceae) at Pundibari: 26°52´43" N, 89°10´75" E, 47 m above mean sea level, Cooch Behar, West Bengal on 11 November 2016; 2 females (Acarol.lab/BCKV/8183-8184/2016), collected from Arjun, Terminalia arjuna (Combreteaceae) and 2 females (Acarol.lab/BCKV/8187-8188/2016), collected from Gamari, Gmelina arborea ( Verbenaceae ) at Tufanganj: 26°33´05" N, 89°66´75" E, 70 m above mean sea level, Cooch Behar, West Bengal on 9 November 2016; 2 males (Acarol.lab/BCKV/8180-8181/2016) from Amra, Spondias pinnata (Anacardiaceae) at Pundibari: 26°52´43" N, 89°10´75" E, 47 m above mean sea level, Cooch Behar, West Bengal on 11 November 2016; 1 male (Acarol.lab/BCKV/8186/2016) from Gamari, Gmelina arborea ( Verbenaceae ) at Tufanganj: 26°33´05" N, 89°66´75" E, 70 m above mean sea level, Cooch Behar, West Bengal on 9 November 2016; 4 males, Registration number 5761/17 collected from Gamari, Gmelina arborea ( Verbenaceae ) at Raja Bhatkhawa: 26°61´60" N, 89°53´24" E, 221 m above mean sea level, Alipurduar, West Bengal on 2 December 2016.

Distribution. Asia: India, Arunachal Pradesh: Gupta (1986); Gupta (1987b); Karnataka: Gupta (1986); Meghalaya: Gupta (1978); West Bengal.

Remarks. This species is well distributed in the northern districts (Darjeeling, Jalpiguri and Cooch Behar) of West Bengal in association with cultivated crops and forest trees in association with plant feeding mites and small sucking insects pests. Therefore, it may be possible to use this species as potential biocontrol agent for management of pest mites.

Figures

FIGURES 8–14. Amblyseius guajavae (FEMALE). 8. DORSAL VIEW OF IDIOSOMA; 9. VENTRAL VIEW OF IDIOSOMA; 10. CHELICERA; 11. SPERMATHECA; 12. GENU, TIbIA AND bASITARSUS IV; 13. VENTRAL VIEW OF IDIOSOMA (MALE); 14. 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.