Asperoseius jujubae, 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 : 62-64

Asperoseius jujubae sp. nov.

( Figs 55–61 , 97–99 )

Female (n = 10). Dorsum ( Fig. 55 ). Dorsal shield 361, 360 (358–362), long and 247, 245 (240–250), wide, strongly sclerotised and imbricated all over the entire dorsum with five pairs of solenostomes (gd2, gd5, gd6, gd8 and gd9); 15 pairs of dorsal setae and one pair (r3) of sublateral setae: j 1 32, 31 (30–32), j 3 20, 20 (20–21), j 4 11, 12 (10–13), j 5 10, 10 (9–11), j 6 31, 30 (30–31), J5 4, 4 (4–5), z 2 29, 28 (25–31), z 4 31, 30 (28–32), z 5 11, 12 (11–13), Z 1 29, 29 (28–30), Z4 42, 41 (40–42), Z5 44, 45 (43–46), s4 35, 34 (33–35), S2 35, 35 (33–36), r 3 24, 25 (23–26), R 1 26, 25 (25–26). The dorsal shield setae j4, j5, z5 and J5 are smooth, small while the remaining setae are club-shaped, long and barbed in the distal half with a transparent cap at the rounded tip, seta R1 on dorsal shield. Seta Z5 is longest.

Peritreme ( Fig. 55 ). Extending forward beyond the bases of j1.

Venter ( Fig. 56 ). All shields smooth, sternal shield 58, 59 (58–60) long and 77, 76 (73–78) 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, with lateral notch and clearly visible in all specimens. Distances between ST2–ST2 48, 48 (47–49), ST5–ST5 58, 57 (57–58). Ventrianal shield vase-shaped without any pre-anal pore 117, 116 (113–119) long, 79, 78 (75–80) wide at level of ZV2 setae and 64, 63 (63–64) wide at level of anus; with three pairs of pre-anal setae, JV1, JV2 and ZV2, membrane surrounding ventrianal shield with three pairs of setae: ZVl, JV4 and JV5; the latter 20, 20 (20–21) long, blunt tipped and smooth.

Chelicera ( Figs 57 , 97 ). Fixed digit 25, 25 (25–26) long, with three teeth; movable digit 23, 23 (23–24) long, with one tooth.

Spermatheca ( Figs 58 , 98 ). Calyx short 6, 5 (4–6) long, like stalk of tomato fruit; atrium, major and minor duct not visible.

Legs ( Fig. 59 ). Legs IV with three smooth macrosetae with blunt rounded tips and of the following lengths: genu 19, 18 (15–20), tibia 12, 11 (8–13), basitarsus 46, 45 (42–48). Chaetotactic formula of genu II: 1–2/0, 2/0–1; genu III: 1–2/1, 2/0–1. Length of leg I: 285, 286 (283–288), leg II: 255, 259 (250–268), leg III: 255, 259 (250–268), leg IV: 315, 324 (312–335).

Male (n = 4). A lightly sclerotised mite with 16 pairs of dorsal setae. Idiosomal setal pattern: 10A:6D/ JV –3,4: ZV –1,3.

Dorsum. Dorsal shield 290, 278 (263–293) long and 183, 184 (183–185) wide, 16 pairs of setae on dorsal shield: j 1 21, 22 (21–23), j 3 14, 13 (12–14), j4 7, 7 (7–8), j5 7, 6 (6–7), j 6 14, 14 (13–15), J5 2, 3 (2–4), z 2 16, 16 (16–17), z 4 18, 19 (17–20), z5 7, 6 (6–7), Z 1 14, 14 (14–15), Z 4 27, 27 (26–28), Z5 34, 35 (33–37), s 4 21, 22 (21–23), S 2 25, 24 (24–25), r 3 21, 20 (20–21), R 1 20, 19 (18–20). The setae j4, j5, z5 and J5 are smooth, small while the remaining setae are club-shaped, long and barbed in the distal half with a transparent cap at the rounded tip.

Peritreme. Extending beyond level of j1.

Venter (( Fig. 60 ). Sternogenital shield smooth, with five pairs of setae and two pairs of distinguishable lyrifissures. The smooth, rhombic ventrianal shield 103, 100 (95–105) long, 107, 105 (100–110) wide at the level of ZV2 setae, 76, 76 (75–77) wide at the level of anus with three pairs of pre-anal setae, JV1, JV2, and ZV2, one pairs of poroids at the lateral side of the anal opening and three pairs of distinguishable lyrifissures. Unsclerotised membrane surrounding ventrianal shield with one pair of setae, JV5, just below the level anal opening.

Legs. Leg IV with three smooth macrosetae of following lengths; genu 12, 12 (11–13), tibia 6, 7 (6–8), basitarsus 33, 34 (32–35). Chaetotactic formula of genu II and genu III are identical to the female. Length of leg I: 235, 236 (233–238), leg II: 195, 197 (193–200), leg III: 186, 184 (180–188), leg IV: 250, 249 (248–250).

Chelicera ( Figs 61 , 99 ). Spermatodactyl with an elongated shaft 20, 20 (20–21) long terminating with an upward toe, 10 long.

Type specimens. Holotype: female (Acar.lab/BCKV/8056/2016) (Registration number 4411/17 deposited in the NZC, Zoological Survey of India, Kolkata) collected only from Ber, Ziziphus jujuba (Rhamnaceae) , at Mondouri: 22° 56' 32"N, 88° 30' 51"E, 9 m above mean sea level, Nadia, West Bengal on 24 October 2016; 2 paratype females (Acar.lab/BCKV/8057/2016) (Registration number 4412/17 deposited in the NZC, Zoological Survey of India, Kolkata,with same collection data as holotype female; 19 paratype females (Acar.lab/BCKV/ 8058-8063/2016) with same collection data as holotype, 4 paratype females (Acar.lab/BCKV/8264/2016) collected from same host at same locality as holotype on 27 October 2016; 2 paratype male (Acar.lab/BCKV/8263-8264/ 2016) collected from same host at same locality as holotype female on 27 October 2016; 1 paratype male (Acar.lab/ BCKV/8059/2016) (Registration number 4413/17 deposited in the NZC, Zoological Survey of India, Kolkata) with same collection data as holotype female.

Etymology. The specific name jujubae refers to the type host plant, Ziziphus jujuba Mill. from which the type specimens were collected.

Remarks. The dorsal shield of Asperoseius jujubae is heavily sclerotised with rectangular shell like structure laterally and reticulated opisthosoma. This new species is very close to Asperoseius africanus ( Chant, 1957a) but differs from the former species in the length of dorsal shield setae j4 5, j5 5, z5 5, j6 22 and Z1 24 which are much shorter in the latter species than the former species j4 11, j5 10, z5 11, j6 31 and Z1 29. The setae r3 24, R1 26, Z4 42 and Z5 44 of the former species are much shorter than the latter species r3 33, R1 42, Z4 52 and Z5 57. The posterior margin of sternal shield of the former species is concave with a notch and lobe like part laterally while the posterior margin is concave without notch and lobe like part laterally in the latter species also both the species differs from the shape of the ventrianal shield and genital shield.

Figures

FIGURES 55–61. Asperoseius jujubae (FEMALE). 55. DORSAL VIEW OF IDIOSOMA; 56. VENTRAL VIEW OF IDIOSOMA; 57. CHELICERA; 58. SPERMATHECA; 59. GENU, TIbIA AND bASITARSUS IV; 60. VENTRAL VIEW OF IDIOSOMA (MALE); 61. SPERMATODACTYL.

FIGURES 79–99. 79–80. Amblyseius crotalariae (GUPTA, 1977), CHELICERA, SPERMATHECA; 81–82. Amblyseius guajavae (GUPTA, 1978), CHELICERA, SPERMATHECA; 83–84. Typhlodromips syzygii (GUPTA, 1975), CHELICERA, SPERMATHECA; 85–86. Scapulaseius moraesi sp. nov.; CHELICERA, SPERMATHECA; 87–88. Scapulaseius asiaticus (EVANS, 1953), CHELICERA, SPERMATHECA; 89–91. Euseius sundarbanensis sp. nov.; CHELICERA, SPERMATHECA, SPERMATODACTYL; 92–93. Euseius astrictus SP. NOV;. CHELICERA, SPERMATHECA; 94–96. Asperoseius latericulus sp. nov.; CHELICERA, SPERMATHECA, VENTRIANAL SHIELD; 97–99. Asperoseius jujubae sp. nov., CHELICERA, SPERMATHECA, SPERMATODACTYL.