Amblyseius parbatabasii, Karmakar & Bhowmik & Sherpa, 2017

Karmakar, Krishna, Bhowmik, Sagarika & Sherpa, Choyang, 2017, Description of five new species and re-description of two species of Amblyseius (Acari: Phytoseiidae) from West Bengal, India, Zootaxa 4311 (1), pp. 39-61 : 48-51

Amblyseius parbatabasii sp. nov.

( Figs 23–29 , 55–56 )

Female (n = 10). Dorsal shield smooth with light marks of sigilla mostly on lateral sides of podosomal area, with idiosomal setal pattern 10A: 9B/JV–3: ZV. Setae j4, j5, j6, J2, J5, z2, z4, z5, Z1, S2, S4, S5, r3 and R1 are short and smooth while the setae j1, j3, s4, Z4 and Z5 are relatively long and smooth, spermatheca sclerotised, capsule shaped short calyx with spiny outer surface, atrium distinct with thick major duct and indistinct minor duct.

Posterior margin of sternal shield is slightly wavy and concave. Movable digit of chelicera with five backwardlydirected teeth. Ventrianal shield is pentagonal with wavy lateral margins.

Dorsum ( Fig. 23 ). Dorsal shield 364 (363–365), long and 219 (213–225), wide with seven pairs of solenostomes (gd1, gd2, gd4, gd5, gd6, gd8 and gd9); 17 pairs of dorsal setae and two pairs of sublateral setae: j1 32 (32–33), j3 55 (52–58), j4 5 (5–6), j5 4 (4–5), j6 5 (5–6), J2 6 (6–7), J5 7 (6–8), z2 8 (8–9), z4 7 (6–8), z5 4 (4– 5), Z1 8 (7–9), Z4 112 (110–113), Z5 254 (243–265), s4 97 (95–100), S2 7 (6–8), S4 8 (7–9), S5 8 (7–9), r3 17 (15– 18), R1 9 (9–10). All setae smooth, j1, j3, are long and s4, Z4, and Z5 very long.

Peritreme ( Fig. 23 ). Extending forward beyond the bases of j1.

Venter ( Fig. 24 ). All shields smooth, sternal shield 62 long and 84 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 clearly visible. Distances between ST1–ST3 62 (62–63), ST2–ST2 74 (74–75), ST3–ST3 84 (83–85), ST5–ST5 73 (70–75). Two pairs of metapodal shields, primary shield 22 (20–23) long, secondary shield 15 (13–17) long. Ventrianal shield 114 (109–118) long, 82 (80–84) wide at level of ZV2 setae and 66 (62–70) 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 76 (71–80) long, smooth.

Chelicera ( Figs 25 , 55 ). Fixed digit 41 (40–42) long, with 13 teeth and conspicuous pilus dentilis; movable digit 41 (40–42) long, with five teeth.

Spermatheca ( Figs 26 , 56 ). Calyx capsule-shaped 11 (11–12) long with spiny outer surface, atrium distinct with horn-like major duct, minor duct not visible.

Legs ( Fig. 27 ). Legs IV with three smooth macrosetae with pointed tips, of the following lengths: genu 114 (110–118), tibia 78 (76–80), basitarsus 68 (68–70). Chaetotactic formula of genu II: 1 2/1, 2/0 1; genu III: 1 2/1, 2/ 1 0. Length of leg I 317 (308–325), leg II 272 (263–280), leg III 269 (262–275), leg IV 357 (350–363).

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

Dorsum. Dorsal shield 250 long and 188 wide, smooth, solenostomes not distinguishable; 17 pairs of setae on dorsal shield and two pairs of setae on unsclerotised cuticle: j1 25, j3 45, j4 5, j5 3, j6 5, J2 6, J5 7, z2 9, z4 10, z5 4, Z1 8, Z4 80, Z5 200, s4 73, S2 9, S4 7, S5 7, r3 17, R1 10. All setae smooth and setae j1, j3, are long and setae s4, Z4, and Z5 very long.

Peritreme. Extending beyond level of j1.

Venter ( Fig. 28 ). The sternogenital shield with few lateral lines and ventrianal shields reticulated. Sternogenital shield with five pairs of setae and two pair of distinguishable lyrifissures. Ventrianal shield 105 long, 113 wide at the level of ZV2 setae, 53 wide at the level of anus with three pairs of pre-anal setae, JV1, JV2, and ZV2, one pairs of poroids 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 and of following lengths; genu 73, tibia 50, basitarsus 50. Chaetotactic formula of genu II and genu III are identical to the female. Length of leg I: 280, leg II: 238, leg III: 238, leg IV: 300.

Chelicera ( Fig. 29 ). Spermatodactyl with an elongated shaft 19 long terminating with a wide toe, 10 long.

Type Specimens. Holotype: Female (Acar.lab/BCKV/5773/2015) (Registration number 4399/17 deposited in the NZC, Zoological Survey of India, Kolkata), collected from citrus , Citrus reticulata (Rutaceae) , at Kalimpong: 27°4'25.17"N, 88°28'37.92"E, 1165.25 m above mean sea level, West Bengal, on 6 September 2015; 5 paratype female (Acar.lab/BCKV/5775–5779/2015), with same collection data as holotype; 1 paratype female (Acar.lab/ BCKV/8072/2016)(Registration number 4400/17 deposited in the NZC, Zoological Survey of India, Kolkata), collected from Tea, Camellia sinensis (Theaceae) , at Peshok Tea estate: 27°4' 9" N, 88°23' 51" E, 1700 m above mean sea level, Darjeeling, West Bengal, on 7 December 2016; 1 paratype female (Acar.lab/BCKV/8073/2016), same collection data as holotype on 5 December 2016; 1 paratype male (Acar.lab/BCKV/8072/2016) (Registration number 4400/17 deposited in the NZC, Zoological Survey of India, Kolkata), collected from Tea, Camellia sinensis (Theaceae) , at Peshok Tea estate: 27°4' 9" N, 88°23' 51" E, 1700 m above mean sea level, Darjeeling, West Bengal, on 7 December 2016.

Etymology. The specific name parbatabasi is a noun in the Bengali language meaning one who lives in the mountains.

Distribution. Asia: India, West Bengal (present study).

Remarks. The dorsal shield of A. parbatabasii is smooth with seven pairs of solenostomes and five pairs of lateral lyrifissures, the peritreme extends beyond j1 with four rows of microtubercles, the posterior margin of sternal shield is concave and the ventrianal shield is pentagonal with wavy lateral margins. Amblyseius parbatabasii is close to A. asperoservix McMurtry & Moraes, 1985 , but differs from the latter species by the shape of the spermatheca which is with capsule shaped calyx 5 long with a spiny surface and the thick major duct tapers distally in the former species, while it is long 14 long narrower near the vesicle in the latter species. The former species also differs from the latter species by the longer dorsal shield setae j1 32, j3 55, s4 97, Z4 112 and Z5 254 of the former species than the dorsal shield setae j1 28, j3 47, s4 65, Z4 87 and Z5 156 of the latter species and also the movable digit of the former species has five backwardly-directed teeth while it has four in the latter species.

Figures

FIGURES 23 – 29. Amblyseius parbatabasii (female). 23. Dorsal view of idiosoma; 24. Ventral view of idiosoma; 25. Chelicera; 26. Spermatheca; 27. Genu, tibia and basitarsus IV; 28. Ventral view of idiosoma (male); 29. Spermatodactyl.

FIGURES 44 – 61. Amblyseius spp., chelicera, spermatheca and spermatodactyl. 44 – 46. A. dahliae sp. nov.; 47 – 49. A. bengalensis sp. nov.; 50 – 51. A. brachycalyx sp. nov.; 52 – 54. A. conulus sp. nov.; 55 – 56. A. parbatabasii sp. nov.; 57 – 59. A. largoensis (Muma, 1955); 60 – 61. A. herbicolus (Chant, 1959).