Typhlodromus (Anthoseius) heliotropium, Karmakar & Bhowmik, 2018

Karmakar, Krishna & Bhowmik, Sagarika, 2018, Description of eight new species and re-description of four species belonging to the family Phytoseidae (Acari: Mesostigmata) from West Bengal, India, Zootaxa 4422 (1), pp. 41-77 : 67

Typhlodromus (Anthoseius) heliotropium sp. nov.

(Figs 67–71, 103–105)

Female (n = 10). Dorsum (Fig. 67). Dorsal shield 388, 383 (375–390), long and 200, 206 (198–213), wide, smooth with lateral lines and marks of sigilla, prodorsal part narrower than opisthosma with a deep notch at the waist region with six pairs of solenostomes (gd2, gd4, gd5, gd6, gd8 and gd9); 18 pairs of dorsal setae and two pairs of sublateral setae: j 1 13, 12 (10–13), j 3 11, 13 (10–15), j 4 13, 14 (12–15), j 5 11, 12 (10–13), j 6 13, 12 (12–13), J 2 13, 13 (12–14), J 5 10, 9 (8–10), z 2 10, 11 (10–12), z 3 15, 14 (14–15), z 4 15, 15 (13–16), z 5 10, 11 (10–12), Z 4 11, 12 (10–14), Z 5 17, 17 (17–18), s 4 15, 15 (15–16), s 6 14, 15 (13–16), S 2 14, 15 (13–16), S 4 13, 13 (12–14), S 5 15, 14 (13–15), r 3 14, 15 (13–16), R 1 13, 12 (12–13). All setae short and smooth.

Peritreme (Fig. 67). Extending forward to the bases of j3.

Venter (Fig. 68). All shields except ventrianal shield are smooth, sternal shield 73, 72 (70–73) long and 71, 72 (70–73) 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 bilobed. Distances between ST2–ST2 65, 64 (63–65), ST5–ST5 65, 64 (63–65). Two pairs of metapodal shields, primary shield 30, 32 (28–35) long, secondary shield 12, 12 (10–13) long. Posterior margin of genital shield truncated with a pair of notches at the posterior lateral margin. Ventrianal shield vase-shaped ( Fig. 105 ), 134, 134 (134–135) long, 87, 86 (83–88) wide at level of ZV2 setae and 70, 73 (68–78) wide at level of anus; with three pairs of pre-anal setae, JV1, JV2 and ZV2, and one pair of pre-anal pores. Posterior part surrounding anal opening is reticulated. Membrane surrounding ventrianal shield with four pairs of setae: ZVl, ZV3, JV4 and JV5; the latter 15, 15 (15–16) long, smooth at the level of anal opening.

Chelicera (Figs 69, 103). Fixed digit 27, 27 (25–28) long, with 6 teeth anterior two teeth are specifically contiguous; movable digit 27, 27 (25–28) long, with three teeth.

Spermatheca (Figs 70, 104). Calyx funnel-shaped, constricted 10, 10 (10–11) long, atrium distinct major duct long, minor duct invisible.

Legs (Fig. 71). Legs IV without macrosetae. Chaetotactic formula of genu II: 1 2/0, 2/1 1; genu III: 1 2/1, 2/0 1. Length of leg I: 252, 254 (250–258), leg II: 200, 198 (195–200), leg III: 197, 192 (188–195), leg IV: 252, 257 (250–263).

Type Specimens. Holotype: female (Acar.lab/ BCKV /8268/2017) (Registration number 4414/17 deposited in the NZC, Zoological Survey of India, Kolkata), collected from Indian Heliotrope, Heliotropium indicum (Boraginaceae) at Kakdwip: 21° 87' 60" N, 88° 18' 53" E, 3 m above mean sea level, South 24 Parganas, West Bengal, on 8 April 2017, 9 paratype females (Acar.lab/ BCKV /8268-8272/2017), with same collection data as holotype.

Etymology. The specific name heliotropium refers to the host plant, Heliotropium indicum L. from which the type specimens were collected.

Remarks. Typhlodromus (Anthoseius) heliotropium is close to T. (A.) kutabus Schicha & Corpuz-Raros, 1992 , T. (A.) charactus ( Ueckermann, 1996) and T. (A.) eremicus Meyer & Ueckermann, 1989 . The former species differs from the latter species by the posterior margins of the sternal shield, and the shape of the genital shield, ventrianal shield and spermatheca. The posterior margin of the sternal shield in the former species is bi-lobed while it is concave and wavy in T. (A.) kutabus . The dorsal opisthosomal region of the latter species is reticulated, but smooth in the former species. In the former species the calyx is funnel-shaped and constricted while it is bell-shaped and without constriction in the latter species. The peritreme of the former species extended to base of j3 while it is extended beyond j 3 in the latter species. The former species also differs from the latter species by the shape of genital shield, number of teeth in the fixed digit of chelicerae and reticulation pattern of ventrianal shield. Typhlodromus (Anthoseius) heliotropium differs from T. (A.) charactus by the shape of the sternal shield, reticulation pattern of the ventrianal shield, shape of spermatheca and length of the peritreme. The posterior margin of the sternal shield in the former species is bi-lobed while in the latter species it has a posterior medial lobe. The anal region of the ventrianal shield in the former species reticulated while it is smooth in the latter species, and the calyx of the spermatheca of the former species is short and funnel-shaped with a constriction at the end of the atrium, which is not found in the latter species. The peritreme extends to j 3 in the former species while it extends to base of j 1 in the latter species. Typhlodromus (Anthoseius) heliotropium differs from T. (A.) eremicus by the convex posterior margin of sternal shield, dorsal opisthosomal reticulation pattern, shape of ventrianal shield and shape of the spermatheca. The peritreme extends to level of z 2 in latter species while it extends to the level of j 3 in the former species.

Figures

FIGURES 100–111. 100–102. Typhlodromus (Anthoseius) carambolae sp. nov.; SPERMATHECA, CHELICERA, LEG IV; 103–105. Typhlodromus (Anthoseius) heliotropium sp. nov.; CHELICERA, SPERMATHECA VENTRIANAL SHIELD; 106–111. Phytoseius namkhanaensis sp. nov.; DORSAL SHIELD, VENTRIANAL SHIELD, SPERMATHECA, SPERMATODACTYL, LEG IV, CHELICERA.