Typhlodromus (Anthoseius) campana, 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 : 337-340

Typhlodromus (Anthoseius) campana sp. nov.

( Figs 48–52 ; 96–98)

Female (n=3). Diagnosis.The species is distinguished by having dorsum strongly reticulated, all the dorsal setae short, thin, smooth and pointed except Z5 smooth with bulbous tip; posterior margin of sternal shield slightly wavy, fixed digit of chelicerae with six teeth while movable digit with three teeth, spermatheca bell-shaped, basitarsus of leg IV with bulbous macroseta while the same on tibia and tarsus are pointed.

Dorsum ( Fig. 48 ). Dorsal shield 350 (349–353) long and 165 (164–167) wide, strongly reticulated, with six pairs of pores (gd2, gd4, gd5, gd6, gd8 and gd9); 18 pairs of setae on dorsal shield and two pairs on unsclerotised dorsal cuticle: j1 15 (14–16), j3 18 (17–19), j4 12 (11–14), j5 13 (11–14), j6 16 (15–17), J2 15 (14–16), J5 8 (6–8), z2 13 (12–14), z3 16 (14–17), z4 15 (14–16), z5 14 (13–15), Z4 25 (22–26), Z5 31 (29–34), s4 23 (21–24), s6 16 (14 –17), S2 22 (20–24), S4 25 (24–26), S5 18 (17–19), r3 20 (19–22), and R1 18 (16–19). All setae smooth and pointed, seta Z5 smooth and bulbous.

Peritreme ( Fig. 48 ). Extended beyond the bases of j1.

Venter ( Fig. 49 ). All shields are smooth. The sternal shield rectangular, posterior margin of sternal shield slightly wavy. Sternal shield 69 (68–71) long and 64 (63–65) wide at 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 20 (19–22) long. Distances between st2-st2 58 (56–59), st5-st5 56 (55–57). The base of the genital shield broad, flat posteriorly. Two pairs of metapodal shields present. The primary inguinal sigilla 21 (20–22) long and 5 (4–6) wide, secondary ones 14 (13–15) long. Genital shield smooth, broad at base and narrow at genital opening with irregular circular flap. Ventrianal shield smooth, pentagonal 112 (111–114) long, 90 (89–91) wide at level of ZV2 and 65 (64–68) wide at anus level with four pairs of pre-anal setae, JV1 10 (9–11), JV2 10 (9–11), ZV2 12 (11–13), JV3 12 (11–13) and one pair of pre-anal pores gv3 22 (20–23) apart below JV2. Membrane surrounding ventrianal shield with four pairs of setae ZV1 10 (9–11), ZV3 12 (12–14), JV4 14 (13–15) and JV5 38 (37–40); JV5 long, smooth with bulbous tip.

Chelicera ( Figs 50 ; 97). Fixed digit 26 (25–27) long with six teeth and distinct pilus dentilis, movable digit 26 (25–27) long with three backwardly directed teeth.

Spermatheca ( Fig. 51 ; 96). Spermatheca bell-shaped. Calyx 16 (15–17) long with a distinct narrow neck at the base of atrium, minor duct and flattened major duct visible.

Leg ( Figs 52 ; 98). Macroseta on tarsus of leg IV with bulbous tip while the same on genu and tibia of leg IV are pointed and of the following lengths: genu 15 (14–16), tibia 20 (19–21) and tarsus 45 (44–46). Chaetotactic formula of genu II: 1 2/1, 2/0 1 and genu III 1 2/1, 2/01. Length of leg I 363 (360–368), leg II 240 (238–245), leg III 233 (230–236) and leg IV 388 (387–390).

Type specimens. Holotype: female (Acarol.lab/ BCKV/8385 /20) collected from weed ( Rubus elypticus ), at Mawkdok: 25°24'30"N, 91°46'44"E, 1806m AMSL, East Khasi Hills , Meghalaya on 1 st May , 2019; deposited in the NZC, Zoological Survey of India, Kolkata. Two paratype females (Acarol.lab/ BCKV/8402 /2019) with same collection data as holotype deposited in the Acarological laboratory, Department of Entomology , BCKV, Mohanpur, Nadia, West Bengal, India.

Etymology. The specific name campana refers to the unique bell-shaped spermatheca of the new species.

Remarks. The new species Typhlodromus (Anthoseius) campana is different from all the members of subspecies group rhenanus by having bell-shaped spermatheca with conspicuous neck at the base of atrium. The new species is close to T. (A.) neorhenanus Gupta, 1977; T. (A.) sijiensis Gupta, 1986 ; and T. (A.) dahungensis Pramanik & Karmakar, 2016 by having similar dosum and venter. However, this new species differs from the close species by length and form of dorsal setae, shape of ventrianal shield, number of teeth on fixed and movable digit, shape of spermatheca, and number and form of leg macrosetae. All the differences between the new species and its close species are presented in Table 11.

Figures

FIGURES 48–52. Typhlodromus (Anthoseius) campana (female). 48. Dorsal view of idiosoma; 49. Ventral view of idiosoma; 50. Chelicera; 51. Spermatheca; 52. Genu, tibia and basitarsus of leg IV.