Typhlodromus (Anthoseius) adhatoda Karmakar et al., 2021

Molla, Md. Iftiar Hossain, Kar, Anamika, Bala, Suvash Chandra & Kar, Krishna Karma-, 2021, Description of four new species of phytoseiid mites belonging to the genus Typhlodromus (Anthoseius) De Leon from West Bengal, Zootaxa 4949 (3), pp. 541-556 : 547-549

Typhlodromus (Anthoseius) adhatoda Karmakar et al. sp. nov.

( Figs 11–15 ; 29–31 )

Description

Female (n= 6). Dorsal shield strongly reticulated, idiosomal setal pattern 12A:8A/JV:ZV, all dorsal setae slightly serrated with pointed tip, setae Z4 and Z5 with rounded tip, seta ST3 outside the sternal shield, macrosetae of leg IV with bulbous tip, spermatheca bell shaped with prominent neck between calyx and atrium.

Dorsum ( Fig. 11 ). dorsal shield 310 (310–313) long and 152 (150–162) wide, strongly reticulated, prodorsum wide, with six pairs of solenostomes (gd1, gd2, gd4, gd6, gd8 and gd9); 18 pairs of setae on the dorsal shield and two pairs of setae on the unsclerotised cuticle: j1 13 (12–15), j3 21 (20–22), j4 18 (16–19), j5 18 (16–19), j6 18 (16–19), J2 22 (20–23), J5 10 (8–11), z2 15 (14–17), z3 19 (18–21), z4 21 (20–23), z5 19 (17–20), Z4 33 (32–35), Z5 42 (40–44), s4 22 (20–23), s6 24 (22–25), S2 28 (26–29), S4 29 (27–30), S5 24 (22–25), r3 17 (15–18), R1 20 (19–22). All setae slightly serrated with pointed tips except setae Z4 and Z5 with rounded tips.

Peritreme ( Fig.11 ). Extending beyond the bases of j1.

Venter ( Fig.12 ). All shields are smooth. Sternal shield 63 (62–64) long and 62 (60–64) wide at level of setae ST1–ST3 and ST3–ST3 respectively, with two pairs of setae and two pairs of lyrifissures, one pair of setae ST3 off the shield on unsclerotised membrane; one pair of setae ST4 21 (20–22) on distinct metasternal plate; posterior margin of the sternal shield is wavy. Distances between ST2–ST2 58 (57–58), ST5–ST5 57 (55–58). Two pairs of metapodal shields present, the primary shield triangular 20 (18–21) long and 8 wide; secondary shield small 10 long. Ventrianal shield pentagonal 110 (108–111) long, 93 (89–95) wide at level of ZV2 setae and 82 (80–84) at anus level with four pairs of pre-anal setae JV1 15 (13–16), JV2 15 (13–16), JV3 15 (13–16), ZV2 13 (11–14) and one pair of pre-anal pores. Membrane surrounding ventrianal shield with three pairs of distinct pores and four pairs of setae ZV1 21 (19–22), ZV3 10 (8–11), JV4 14 (12–15) and JV5 37 (35–39); seta JV5 is long and serrated with rounded tip. Setae a1 15 (13–16), a2 15 (13–16), a3 15 (13–16) surrounding the anal region.

Chelicera ( Fig. 13 ). Fixed digit 32 (31–34) long with two anterior teeth, one posterior tooth and distinct pilus dentilis, movable digit 32 (31–34) long with three teeth.

Spermatheca ( Fig. 14 ). Calyx elongated bell shaped 18 (16–20) long, wider at base of vesicle and narrow near atrium, a distinct neck present in between calyx and atrium, minor duct and major duct clearly visible.

Leg ( Fig. 15 ). Leg IV with three macrosetae in genu, tibia and basitarsus. All leg setae smooth and tip of the macrosetae are bulbous and of following lengths: genu 16 (13–18), tibia 24 (20–25) and tarsus 30 (28–33). Chaetotactic formula of genu II: 1–2/0. 2/1–1 and genu III: 1–2/1. 2/0–1. Length of leg I: 241 (238–245), leg II 208 (205–212), leg III 185 (182–188) and leg IV 263 (260–264).

Type specimens. Holotype: female (Acarol.lab/ BCKV/8359/2019) deposited in the NZC, Zoological Survey of India, Kolkata, collected from Vasaka, ( Justicia adhatoda L.: Acanthaceae ), at Rasulpur: 23°59’54”N 87°44’46”E, 39 m above mean sea level, Birbhum, West Bengal on 10 th November 2019; five paratype females (Acarol.lab/ BCKV /8360–64/2019) with same collection data as holotype.

Etymology. The specific name adhatoda refers to the type host plant, Justicia adatoda from where the new species were collected.

Remarks. The new species Typhlodromus (Anthoseius) adhatoda sp. nov. is close to T. (A.) kazimiae Denmark and Muma, 1978; T. (A.) apoxys Van der Merwe, 1968 ; and T. (A.) vescus Van der Merwe, 1968 . ST3 out of the sternal shield is common characteristic features for all the species but they differ from the new species by the pattern of dorsal shield setae, posterior margin of sternal shield, shape of spermatheca and number of macrosetae of leg IV. In the new species all dorsal setae are serrated; posterior margin of sternal shield wavy; number of macrosetae on leg IV three; spermatheca bell shaped with neck between calyx and atrium versus few dorsal setae serrated; posterior margin of sternal shield having distinct loop; single macrosetae on leg IV; spermatheca fundibular with ‘c’ shaped atrium in T. (A.) kazimiae. The new species also differs from T. (A.) apoxys by all dorsal setae serrated versus smooth except Z4 and Z5; posterior margin of sternal shield concave and wavy, movable digit of chelicerae with three teeth versus single tooth, number of macrosetae on leg IV three versus single macroseta on basitarsus, spermatheca bell shaped versus tubular shaped. The new species differs from T. (A.) vescus by all dorsal setae serrated versus smooth except Z4 and Z5; posterior margin of sternal shield wavy versus lobed. The differences between Typhlodromus (Anthoseius) adhatoda sp. nov. and the close species are given in table 3.

Figures

FIGURES 11–15. Typhlodromus (Anthoseius) adhatoda (female). 11. Dorsal view of idiosoma; 12. Ventral view of idiosoma; 13. Chelicera; 14. Spermatheca; 15. Genu, tibia and basitarsus of leg IV.

FIGURES 26–34. 26–28, Typhlodromus (Anthoseius) bengalensis sp. nov.; part of dorsal opisthosoma, macrosetae on leg IV, spermatheca; 29–31. Typhlodromus (Anthoseius) adhatoda sp. nov. part of dorsal opisthosoma, macrosetae on leg IV, spermatheca; 32–34. Typhlodromus (Anthoseius) sagaricus sp. nov. part of dorsal opisthosoma, macrosetae on leg IV, spermatheca.