Typhlodromus (Anthoseius) kanchanjanghai, Kar & Karmakar, 2022

Kar, Anamika & Karmakar, Krishna, 2022, Description of nine new species of phytoseiid mites (Acari: Mesostigmata) from Sikkim, a north eastern States of India, Zootaxa 5182 (3), pp. 201-237 : 227-234

T. (Anthoseius) kanchanjanghai sp. nov.

( Figs. 43–49 ; 82–86)

Diagnosis. Dorsum striated laterally with slight reticulation on lateral opisthosomal region; almost all lateral setae long and smooth; ventrianal shield pentagonal; fixed digit of chelicera with four teeth and movable digit with one; leg IV with three pointed macrosetae; spermatheca elongated with crescent shaped atrium.

Description. Female (n=10). Dorsum ( Fig. 43 ). Dorsal shield 380 (378–385) long, 172 (170–175) wide, faintly reticulated in lateral part, with six pairs of solenostomes (gd2, gd4, gd5, gd6, gd8 and gd9); poroids are shown in the illustration; 18 pairs of setae on dorsal shield and two pairs of setae on unsclerotised cuticle: j1 27 (25–28), j3 50 (48–51), j4 15 (14–17), j5 15 (14–17), j6 30 (30–34), J2 38 (36–39), J5 5 (4–6), z2 18 (17–19), z3 58 (56–59), z4 20 (18–21), z5 10 (10–12), Z4 70 (68–71), Z5 88 (88–92), s4 58 (57–59), s6 73 (72–75), S2 68 (66–69), S4 42 (42–45), S5 15 (14–16), r3 32 (30–33), R1 20 (19–21). All the lateral setae are long with pointed tip.

Peritreme ( Fig. 43 ). Extending to bases of j3.

Venter ( Fig. 44 ). All shields smooth. Sternal shield 70 (69–72) long, 72 (70–73) wide at level of setae st1-st3 and st3-st3 respectively, with three pairs of setae and two pairs of lyrifissures; and one pair of setae (st4) 28 (26–29) long and a pair of lyrifissures on conspicuous metasternal shield; posterior margin of sternal shield indistinct. Distances between st2-st2 65 (64–66), st5-st5 59 (58–60). Genital shield, posterior margin straight. Two pairs of metapodal shields present, primary shield 30 (30–33) long, 5 (3–5) secondary shield small, 12 (10–12) long. Ventrianal shield pentagonal, 114 (112–115) long, 79 (78–80) wide at level of ZV2 setae, and 62 (62–65) at anus level with three pairs of pre-anal setae JV1 23 (21–23), JV2 23 (21–23), ZV2 24 (23–25) and one pair of pre-anal pores (gv3) below JV2 17 (16–18) apart. Membrane surrounding ventrianal shield with four pairs of setae ZV1 25 (24–26), ZV3 13 (12–14), JV4 20 (19–22) and JV5 52 (50–53), JV5 longest.

Chelicera ( Fig. 45 ). Fixed digit 24 (22–25) long with 4 teeth and distinct pilus dentilis, movable digit 26 (25– 26) long with single tooth.

Spermatheca ( Fig. 46 ). Calyx elongated, 18 (18–20) long, wider distally and proximally terminating with conspicuous atrium from where clearly visible minor duct and major duct arises.

Leg ( Fig. 47 ). Length of leg I 375 (374–376), leg II 252 (250–255), leg III 263 (260–265) and leg IV 420 (420–425). Chaetotactic formula of Sge II 1-2/1 1/1-1 and Sge III 1-2/1 0/2-1. Leg IV with three macrosetae on genu, tibia and tarsus. All leg setae smooth; tip of macroseta present on genu is bulbous while the other macrosetae are pointed and of following lengths: SgeIV 36 (35–38), StiIV 31 (30–33) and Sta IV 58 (57–60).

Male (n = 5). Dorsum. Dorsal shield 255 (252–260) long and 158 (157–162) wide, with lateral lines and reticulated in the lateral opithosomal region; with five pairs of solenostomes (gd2, gd4, gd6, gd8 and gd9); 19 pairs of setae on the dorsal shield: j1 18 (16–19), j3 33 (32–35), j4 18 (17–20), j5 18 (17–20), j6 22 (21–24), J2 25 (24–27), J5 8 (8–10), z2 19 (18–20), z3 38 (37–40), z4 25 (24–27), z5 15 (14–17), Z4 42 (41–44), Z5 58 (57–60), s4 38 (35–40), S2 40 (37–42), S4 30 (29–32), S5 24 (23–26), r3 27 (26–29), R1 20 (19–21). All setae smooth and the lateral setae j3, z3, s4, s6, S2 and S4 are longer.

Peritreme. Extending up to seta j1.

Venter ( Fig. 48 ). Sternogenital shield with a few lateral lines, ventrianal shield striated. Sternogenital shield with five pairs of setae and three pairs of distinguishable lyrifissures. Ventrianal shield 93 (92–100) long, 110 (110–112) wide at level of ZV2 setae and 40 (38–43) wide at level of anus; with three pairs of pre-anal setae, JV1, JV2 and ZV2 arranged in a tangential line and one pair of large pre-anal pores. Membrane surrounding ventrianal shield with one pair of setae JV5; 35 (34–37) long and smooth.

Chelicera ( Fig. 49 ). Spermatodactyl foot-shaped, shaft 10 (9–12) long and foot 5 (4–6) long.

Leg. Length of leg I: 280 (278–284), leg II: 205 (203–210), leg III: 195 (193–200) and leg IV: 288 (287–294). Chaetotactic formula of genu II and genu III are identical to the female. Legs IV with three smooth macrosetae, pointed distally and of the following lengths: SgeIV 30 (28–32), StiIV 34 (32–36), StaIV 55 (52–56).

Type specimens. Holotype: female (Acarol.lab/ BCKV/8653 /2021) deposited in the NZC, Zoological Survey of India, Kolkata, collected from unidentified plant, at East Sikkim: 27°21’28”N 88°37’22”E, 1725 m AMSL, East Sikkim, Sikkim on 28 th March , 2021. 4 paratype females collected on 28 th March, 2021 (Acarol.lab/ BCKV/8654- 55 /2021) with same locality and host plant as holotype. 3 paratype females collected on 28 th March , 2021 (Acarol.lab/ BCKV/8656 /2021) with same locality and unidentified tree plant. 2 paratype females (Acarol.lab/BCKV/8657/2021), collected from large cardamom ( Amomum subulatum ), at East Sikkim 27°96’58”N 88°37’13”E, 1264m AMSL on 29 th March, 2021. 5 paratype males (Acarol.lab/ BCKV/8658-60 /2021), collected from large cardamom ( Amomum subulatum ), at East Sikkim 27°96’58”N 88°37’13”E, 1264m AMSL on 29 th March, 2021.

Etymology. The specific name kanchanjanghai is derived from the famous mountain range ‘Kanchenjungha’ a section of the Great Himalaya which is pronounced in Bengali as Kanchanjangha, the type locality of this species.

Remarks. Typhlodromus (Anthoseius) kanchanjanghai sp. nov. is closed to T. (A.) rickeri Chant, 1960 ; T. (A.) bondasenkoi Arutanjan, 1973; T. (A.) orissaensis Gupta, 1977 ; and T. (A.) channabasavannai Gupta, 1978 by having similar type of dorsum but differs from these close species by the length of dorsal setae, ventrianal shield; number of teeth in fixed and movable digit of chelicera; macrosetae of leg IV. The differences between the new species and its close species are presented in Table 9 .

Figures

FIGURES 43–49. Typhlodromus (Anthoseius) kanchanjanghai (female). 43. Dorsal view of idiosoma; 44. Ventral view of idiosoma; 45. Chelicera; 46. Spermatheca; 47.Genu, tibia and basitarsus of leg IV. 48. Male ventral surface; 49. Spermatodactyl

Tables

TABLE 9. Differences in diagnostic characters between Typhlodromus (Anthoseius) kanchanjonghai sp. nov. and T. (A.) rickeri Chant, 1960; T. (A.) bondasenkoi Arutanjan, 1973; T. (A.) orissaensis Gupta, 1977; and T. (A.) channabasavannai Gupta, 1978

Characteristics	T. (A.) kanchanjanghai sp. nov.	T. (A.) rickeri	T. (A.) bondasenkoi	T. (A.) orissaensis	T. (A.) channabasavannai
j1	25–28	27	21	24	16–20
j3	48–51	67	29	44	36–41
j4	14–17	22	17	26	10–16
j5	14–17	36	17	33	10–16
j6	30–34	47	20	48	16–20
J2	36–39	63	25	54	18–24
J5	4–6	7	14	5	5–6
z2	17–19	18	21	6	9–11
z3	56–59	74	28	53	36–40
z4	18–21	25	29	24	22
z5	10–12	16	32	12	17–22
Z4	68–71	78	35	56	50–72
Z5	88–92	104	59	64	70–90
s4	57–59	78	29	53	40–50
s6	72–75	85	32	64	48–68
S2	66–69	85	32	62	48–68
S4	42–45	49	42	40	30–34
S5	14–16	27	35	16	12–15
r3	30–33	31	-	-	22–29
R1	19–21	27	-	-	I6–22
JV5	50–53	-	-	-	-
Vsl	112–115	134	-	88	100–123
Vsw at ZV2	78–80	88		76	75–100
Vsw at anus	62–65	-	-	-	-
FD number of teeth	4	-	4	-	-
MD number of teeth	1	-	3	-	2
SgeIV	35–38	45	-	10	40–50
StiIV	30–33	51	-	14	38–48
StaIV	57–60	63	-	36	60–70
Form of macrosetae	Pointed	Pointed	Bulbous	Pointed	Pointed

TABLE 9. Differences in diagnostic characters between Typhlodromus (Anthoseius) kanchanjonghai sp. nov. and T. (A.) rickeri Chant, 1960 ; T. (A.) bondasenkoi Arutanjan, 1973; T. (A.) orissaensis Gupta, 1977 ; and T. (A.) channabasavannai Gupta, 1978

Sources of measurement: Original paper of Chant, 1960; Arutanjan, 1973; Gupta, 1977, 1978, 2003; ‘-’: not available