Typhlodromips jhilimiliensis, Bhowmik & Karmakar, 2021

Bhowmik, Sagarika & Karmakar, Krishna, 2021, Five new species and re-description of eight species belonging to the family Phytoseiidae (Acari: Mesostigmata) from West Bengal, India, Zootaxa 4975 (3), pp. 401-450 : 427-429

Typhlodromips jhilimiliensis sp. nov.

( Figs 48–52 , 106–107 )

Female (n =1) Diagnosis. Dorsal shield highly reticulated with light marks of sigilla and striated antero-laterally, 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 j1, j3, s4, Z4 and Z5 are relatively long and smooth except Z4 and Z5 lightly serrated, spermatheca saucer-shaped, atrium distinct with major and minor ducts. Posterior margin of sternal shield strongly wavy. Ventrianal shield is spear-shaped with prominent anterior lateral notch.

Dorsum ( Fig. 48 ). Dorsal shield 320 long, 198 wide, anterior dorsum narrow and posterior part wide rounded, with conspicuous waist, indented laterally with irregular margin, with lateral striation and strongly reticulated opisthosomal area, with marks of sigilla and seven pairs of solenostomes (gd1, gd2, gd4, gd5, gd6, gd8 and gd9); 17 pairs of dorsal setae and two pairs of sublateral setae: j1 13, j3 17, j4 8, j5 7, j6 10, J2 13, J5 7, z2 11, z4 12, z5 8, Z1 13, Z4 29, Z5 70, s4 21, S2 11, S4 10, S5 9, r3 14, R1 11. All setae smooth except Z4 and Z5 lightly serrated.

Peritreme ( Fig. 48 ). Extending forward up to level of j1.

Venter ( Fig. 49 ). All shields smooth. Sternal shield with 55 long and 70 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 membrane; posterior margin of sternal shield wavy. Distances between ST2–ST2 63, ST5–ST5 65. Two pairs of metapodal shields, primary shield 20 long, secondary shield 12 long. Ventrianal shield 110 long, 55 wide at level of JV2 setae and 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. Ventrianal shield spear-shaped, with anterior lateral notch just ahead of the level of ZV2, and pointed laterally at the level of anal opening. Membrane surrounding ventrianal shield with four pairs of setae ZVl, ZV3, JV4 and JV5, the latter 29 long, smooth.

Chelicera ( Fig. 50 ). Fixed digit 28 long, with seven teeth, pilus dentilis not visible; movable digit 26 long, with two teeth.

Spermatheca ( Fig. 51 ). Calyx saucer-shaped, 4 long. Atrium distinct with major and minor ducts.

Legs ( Fig. 52 ). Legs IV with three smooth macrosetae with pointed tips, of the following lengths: SgeIV 37, StiIV 35, StIV 42. Chaetotactic formula of genu II: 2 2/0, 2/0 1; genu III: 1 2/0, 2/1 1. Length of leg I: 300, leg II: 250, leg III: 253, leg IV: 330.

Type specimen. Holotype: female (Acar.lab/ BCKV /8280/2018) collected from Jam, Syzygium cumini (Myrtaceae) , at Jhilimili: 22° 49’ 0.12” N, 86° 37’ 0.12” E, 228 m above mean sea level, Bankura, West Bengal on 4 April 2018. Two paratype females (Acar.lab/ BCKV /8655–8656/2019) from same host plant and same locality as holotype, 18 June 2019. Holotype female and one paratype female (Acar.lab/ BCKV /8655/2019) have been deposited in the National Zoological Collection (NZC), Zoological Survey of India, Kolkata with same collection data as above.

Distribution. Asia: India, West Bengal, Bankura.

Etymology. The specific name jhilmiliensis refers to the locality from where the holotype of this species was collected.

Remarks. Typhlodromips jhilmiliensis is close to T. syzygii ( Gupta, 1975) , and T. potentilae ( Garman, 1958) but differs from it by the shape of the ventrianal shield, the posterior margin of the sternal shield and the shape and dentition of cheliceral digits. The posterior margin of the sternal shield of the former species is strongly wavy while it is smoothly concave in the latter species also the ventrianal shield with a deep notch at the anterior lateral sides of the former species which does not match the shape of the pentagonal ventrianal shield of the latter species. The cheliceral fixed digit of the former species has six teeth and the moveable digit with two small teeth, while the latter species has more than ten teeth on the fixed digit and three teeth on the movable digit.

Figures

FIGURES 48–52. Typhlodromips jhilimiliensis sp. nov. (female). 48. Dorsal idiosoma; 49. Ventral idiosoma; 50. Chelicera; 51. Spermatheca; 52. Genu, tibia and basitarsus IV.

FIGURES 106–113. 106. Typhlodromips jhilimiliensis, female, sternal shield; 107. Typhlodromips jhilimiliensis, female, ventrianal shield. 108; Typhlodromips neosyzygii, female, sternal shield; 109. Typhlodromips neosyzygii, female, genital shield; 110. Typhlodromips neosyzygii, female, ventrianal shield; 111. Proprioseiopsis amari, female, chelicera; 112. Proprioseiopsis amari, female, spermatheca; 113. Proprioseiopsis amari, female, genital and ventrianal shields.