Typhlodromus (Anthoseius) barapanicus, Kar & Karmakar, 2021

Kar, Anamika & Karmakar, Krishna, 2021, Description of eleven new species of phytoseiid mites (Acari: Mesostigmata) from Meghalaya state, north eastern India, Zootaxa 5068 (3), pp. 301-354 : 334-337

Typhlodromus (Anthoseius) barapanicus sp. nov.

( Figs 43–47 ; 92–95 )

Female (n=6). Diagnosis. The species is notable by having dorsum strongly reticulated; all the dorsal setae serrated except j4, j5, j6, J2, J5, and z5; seta Z5 serrated with bulbous tip; posterior margin of sternal shield forms an indistinct loop touching the genital cover flap, ventrianal shield pentagonal with four pairs of pre-anal setae, fixed digit of chelicerae with four teeth while movable digit with single tooth, spermatheca long tubular, basal half thick walled with thin walled cervix narrowed at the base of atrium, leg IV with one macroseta with bulbous tip.

Dorsum ( Figs 43 ; 92 ). Dorsal shield 335 (334–338) long and 175 (174–177) wide, strongly reticulated, with six pairs of pores (gd1, gd2, gd5, gd6, gd8 and gd9); 18 pairs of setae on the dorsal shield and two pairs on unsclerotised cuticle: j1 22 (20–23), j3 17 (16–20), j4 10 (9–11), j5 10 (9–11), j6 12 (11–13), J2 14 (13–15), J5 9 (8–10), z2 12 (11–13), z3 25 (24–26), z4 14 (13–15), z5 11 (10–13), Z4 23 (23–25), Z5 39 (38–40), s4 25 (23–26), s6 25 (22–25), S2 18 (16–19), S4 20 (19–20), S5 24 (23–25), r3 15 (14–16), R1 15 (14–16). All setae are serrated and with pointed tip except j4, j5, j6, J2, J5, and z5 which are smooth, setae Z5 serrated with bulbous tip.

Peritreme ( Figs 43 ; 92 ). Extended beyond the bases of j1.

Venter ( Fig. 44 ; 93 ). All the shields are smooth. The sternal shield is rectangular with posterior lateral lobe and posterior margin forms a loop touching the genital cover flap. Sternal shield 75 (74–76) long and 53 (52–54) wide at the level of setae st1-st3 and st3-st3 respectively, with three pairs of setae and two pairs of poroids; one pair of setae (st4) on unsclerotised membrane 13 (13–15) long. Distances between st2-st2 53 (52–54), st5-st5 55 (52–54). The base of the genital shield broad, flat posteriorly. Two pairs of metapodal shields present. The primary inguinal sigilla 27 (25–28) long and 4 (3–5) wide, secondary ones 7 (7–9). Genital shield smooth, broad at the base and narrow at genital opening with irregular circular flap. Ventrianal shield smooth, pentagonal, 121 (120–123) long, 81 (80–83) wide at level of ZV2 and 73 (71–74) wide at anus level with four pairs of pre-anal setae, JV1 8 8(7–9), JV2 8 8 (7–9), JV3 8 (7–9), ZV2 8 (7–9) and one pair of pre-anal pore gv3 15 (14–16) apart just below JV2. Membrane surrounding ventrianal shield with four pairs of setae ZV1 9 (8–10), ZV3 8 (8–10), JV4 10 (8–10) and JV5 29 (28–30); the later one is long serrated and pointed.

Chelicera ( Fig. 45 ). Fixed digit 30 (30–33) long with four teeth and distinct pilus dentilis, movable digit 30 (28–30) long with single tooth.

Spermatheca ( Figs 46 ; 95 ). Calyx tubular, 35 (33–35) long. Distal half of calyx thick walled and proximal part thin walled with a neck connected to atrium, minor and major duct visible.

Legs ( Figs 47 ; 94 ). The basitarsus of leg IV with single macroseta with bulbous tip, macrosetae on genu and tibia of leg IV with pointed tip and of following lengths: genu 13 (11–13), tibia 15 (13–15) and basitarsus 28 (25– 28). Chaetotactic formula of genu II: 0 2/1, 2/1 1 and genu III 1 2/1, 2/01. Length of leg I 305 (300–305), leg II 218 (213–219), leg III 213 (212–218) and leg IV 288 (283–288).

Type specimens. Holotype: female (Acarol.lab/ BCKV/8399 /2019) collected from Broom grass, ( Thysanolaena latifolia Roxb. ), at Barapani: 25°40'52"N, 91°54'41"E, 973m AMSL, Barapani, Meghalaya on 3 rd May, 2019; deposited in the NZC, Zoological Survey of India, Kolkata. Three paratype females (Acarol.lab/ BCKV/8399–8400 /2019) with same collection data as holotype and two paratype females (Acarol.lab/ BCKV/8401 /2019) collected from Loktak , 24°33'1.0"N, 93°47'20"E, 768m AMSL, Manipur, from same host and deposited in the Acarological laboratory, Department of Entomology , BCKV, Mohanpur, Nadia, West Bengal, India.

Etymology. The specific name barapanicus refers to the type locality “Barapani” of Meghalaya from where this new species was collected.

Remarks. The new species Typhlodromus (Anthoseius) barapanicus is different from all the members of rhenanus group by having unique type of spermatheca. The new species is close to T (A.) muliebris Van der Merwe, 1968; T (A.) paganus Van der Merwe, 1968; and T. (A.) carambolae Karmakar & Bhowmik, 2018 by having similar pattern of dorsum and venter. Typhlodromus (A.) barapanicus sp. nov. differs from these close species by the dorsal and ventral setal length, form of setae, posterior margin of sternal shield, shape of spermatheca and macrosetae of leg IV. All the differences between the new species and close species are given in Table 10.

Figures

FIGURES 43–47. Typhlodromus (Anthoseius) barapanicus (female). 43. Dorsal view of idiosoma; 44. Ventral view of idiosoma; 45. Chelicera; 46. Spermatheca; 47. Genu, tibia and basitarsus of leg IV.

FIGURES 92–95. Typhlodromus (Anthoseius) barapanicus (female). 92. Dorsal view of idiosoma; 93. Ventral view of idiosoma; 94. Genu, tibia and basitarsus of leg IV; 95. Spermatheca; 96–98. Typhlodromus (Anthoseius) campana (female). 96. Spermatheca; 97. Chelicera; 98. Genu, tibia and basitarsus of leg IV; 99–101. Typhlodromus (Anthoseius) cherrapunjiensis (female). 99. Ventral view of idiosoma; 100. Spermatheca; 101. Chelicera.