Phytoseius baramuracus, Kar & Karmakar, 2022

Kar, Anamika & Karmakar, Krishna, 2022, Seven new species of phytoseiid mites (Acari: Mesostigmata) from Tripura, northeastern India, Zootaxa 5120 (2), pp. 213-241 : 229-231

Phytoseius baramuracus sp. nov.

( Figs 26–30 , 60–63 )

Diagnosis. The species is characterised by strongly reticulated dorsum; serrated dorsal setae except j4, j5, j6, z5 and J5; ventrianal shield vase shaped with three pairs of pre-anal setae; fixed digit of chelicerae with four teeth and movable digit with one tooth; leg IV with three macrosetae with bulbous tips.

Description

Female (n= 8). Dorsum ( Fig. 26 ). Dorsal shield 304 (303–305) long and 128 (127–131) wide, rugose, prodorsum wide, with five pairs of solenostomes (gd1, gd4, gd5, gd8 and gd9); 15 pairs of setae on the dorsal shield: j1 24 (23–25), j3 18 (17–20), j4 8 (8–9), j5 8 (8–9), j6 10 (8–11), J5 8 (7–9), z2 10 (8–11), z3 21 (20–22), z4 25 (24–27), z5 10 (9–12), Z4 48 (47–50), Z5 50 (48–52), s4 43 (42–45), s6 58 (57–59), r3 28 (27–30). Most of the setae serrated except setae j4, j5, j6, z5, and J5 which are smooth.

Peritreme ( Fig. 26 ). Extending beyond the bases of j1.

Venter ( Fig. 27 ). All the shields are smooth. The sternal shield rectangular 54 (52–55) long and 63 (62–65) wide at level of setae st1–st3 and st3–st3 respectively, posterior margin indistinct, with three pairs of setae and two pairs of poroids; one pair of setae (st4) on metasternal platelet 16 (15–17) long. Distances between st2–st2 51 (50–53), st5–st5 60 (58–61). Base of genital shield broad, posteriorly truncated. One pair of metapodal platelets visible 28 (27–30) long. Genital shield smooth and narrow at genital opening with irregular circular flap. Ventrianal shield smooth, sole-shaped 93 (92–95) long, 48 (46–50) wide at level of ZV2 and 42 (40–44) wide at anus level with three pairs of pre-anal setae, JV1 15 (13–16), JV2 12 (11–13), ZV2 12 (11–13) and one pair of pre-anal pores gv3 26 (26–29) apart at the level of JV2. Membrane surrounding ventrianal shield with three pairs of setae ZV1 18 (16–19), ZV3 7 (6–10), and JV5 22 (20–23); seta JV5 long and smooth.

Chelicera ( Fig. 28 ). Fixed digit 23 (22–25) long with four teeth and a distinct pilus dentilis, movable digit 24 (22–25) long with one tooth.

Spermatheca ( Fig. 29 ). Arms of calyx 12 (12–15) long, bell shaped with nodular atrium, major duct flattened, long, minor duct clearly visible.

Leg ( Fig. 30 ). Leg IV with three bulbous macrosetae on tibia and tarsus and of following lengths: genu 7 (6–9); tibia 33 (31–35) and tarsus 20 (18–22). Chaetotactic formula of genu II 1 2/1 2/0 1 and genu III 1 2/1 2/01. Length of leg I 250 (248–254), leg II 216 (212–218), leg III 228 (225–232) and leg IV 374 (372–378).

Etymology. The specific name baramuracus refers to the “Baramura Hill” of Tripura state from where this new species was collected.

Specimens collected. Holotype female (Acarol.lab/ BCKV/8595 /2021) collected from Bamboo, (Babusa sp.), at Subalsing, Baramura Hill: 24°0'20"N, 91°27'47"E, 59m AMSL, West Tripura, on 2 May , 2019; deposited in the NZC, Zoological Survey of India, Kolkata . Paratypes - nine females (Acarol.lab/ BCKV/8595–97 /2021) collected from same host and location and deposited in the Acarological laboratory, Department of Agricultural Entomology , BCKV, Mohanpur, Nadia, West Bengal, India .

Remarks. The new species is distinguished from all the species of horridus species group by having three pairs of leg macrosetae and balloon shaped spermatheca. The new species is diffrerent from the species described and reported from India ( Kar & Karmakar, 2021b) but close to P. brevicrinis Swirski & Shechter, 1961 by having almost similar type of spermatheca and P. jujuba Gupta, 1977b , P. meyerae Gupta, 1977b , P. neocorniger Gupta, 1977b by having similar dorsum. However, this new species differs from these close species by the dorsal setal length, number of teeth in fixed and movable digit of chelicera, form of setae, number and shape of metapodal shield, length and shape of leg macrosetae and shape of spermatheca. All the differences between the new species and the close species are presented in Table 6 .

Figures

FIGURES 26–30. Phytoseius baramuracus (female). 26. Dorsal view of idiosoma; 27. Ventral view of idiosoma; 28. Chelicera; 29. Spermatheca; 30. Genu, tibia and basitarsus of leg IV.

FIGURES 56–70. 56–59. Phytoseius khowaiensis (female). 56. Anterior dorsal view of idiosoma; 57. Posterior dorsal view; 58. Genu, tibia and basitarsus of leg IV; 59. Spermatheca; 60–63. Phytoseius baramuracus (female). 60. Dorsal view of idiosoma; 61. Spermatheca; 62. Ventrianal shield; 63. Genu, tibia and basitarsus of leg IV; 64–70. Typhlodromus (Anthoseius) sonajhuriae (female). 64. Dorsal view of idiosoma; 65. Genu, tibia and basitarsus of leg IV; 66. Anterior dorsal view of idiosoma; 67. Spermatheca; 68. Chelcera; 69. Chelicera; 70. Ventrianal shield.