Oligonychus sapienticolus Gupta, 1976

Oligonychus sapienticolus Gupta, 1976 View in CoL

Distribution: This species was first recorded from Musa paradisiaca L. in India by Gupta, in 1976. It was reported again from India by Gupta (1992), Gupta and Gupta (1994), Dey and Karmakar (2020).

Diagnosis

Male: Aedeagus knob lacking anterior projection, posterior projection with blunted tip slanted and directed posteriorly upward; axis of knob forming a 60 ⁰ angle with shaft. Empodia of all legs with proximoventral hairs, with prominent spurs. Tarsus I with 4 tactile setae and 2 solenidion proximal to proximal duplex setae.

Female: Hysterosomal striation transverse medially and longitudinal striation pattern between f1−f2. Striation in the pregenital region is longitudinal, oblique and continuous. Peritreme hook length 3−5. In tarsus I 3 tactile setae and 1 solenidion proximal to the proximal duplex setae. Empodia split into proximoventral hairs with prominent spurs. Spinneret is about twice as long as wide 5 x 3.

Material examined: 10 females and 4 males collected on Banana, Musa sp. ( Musaceae ) from Mohanpur (22°57’19” N 88°29’46” E), Nadia, 31 January 2023, coll. Subhra Samanta.

Dorsum ( Figure 28 View Figures 28-36 , 42 View Figures 41-43 ): Length of the idiosoma 266−284, width at the level of c setae 203−225, propodosoma set with longitudinal striation forms a semicircular lobe. Hysterosomal striation transverse medially and longitudinal striation pattern between f1−f2.

Length of dorsal setae: v2 42−57, sc1 97−112, sc2 64−81, c1 75−91, c2 79−96, c3 79−91, d1 89−101, d2 87−99, e1 87−98, e2 94−107, f1 75−88, f2 65−78, h1 32−43.

Distance between dorsal setae: v2−v2 61−75, v2−sc1 21−29, sc1–sc2 47−59, sc1−sc1 74−88, sc2−sc2 163−180, c1−c1 57−70, c1−c2 25−33, c2−c3 37−48, c2−c2 115−131, c3−c3 175−197, d1−d1 78−89, d1−d2 37−47, d2−d2 147−166, c1−d1 18−26, c3−d2 34−45, e1− e1 47−55, e1− e2 36−48, e2−d2 31−41, e2−e2 108−127, f1−f1 28−40, f2−f2 56−67, f1−f2 26−36, f1− d1 54−65, h1−h1 18−30.

Ventral ( Figure. 29 View Figures 28-36 , 41 View Figures 41-43 ): Ventral setae slender, smooth. Lengths: 1a 35−46, 1b 37−48, 1c 43−56, 2b 46−57, 2c 57−70, 3a 31−44, 3b 39−48, 4a 39−49, 4b 36−48, ag 41−58, g1 23−34, g2 15−23, ps1 12−20, ps2 11−17, h3 24−32. The striation pattern between the intercoxal region is simple and transverse; striation in the pregenital region is longitudinal, oblique and continuous. Distance between intercoxal setae- 1a −1a 27−41, 3a −3a 52−65, 4a −4a 50−63, ag−ag 50−62, g1−g1 13−19, g2−g2 35−50, g1−g2 15−23, ps1−ps1 18−28, ps2−ps2 15−23, h3−h3 32−42.

Gnathosoma ( Figures 31, 32 View Figures 28-36 ): Stylophore rounded, with only longitudinal striation. Peritreme small hooked, forming a foot-like structure. Hook length 3−5; palpfemur, palpgenu with one setae only, palpfemur dP Fe 58−76, palpgenu l’’ PGe 29−38, palptibia with three setae and d PTi 15−18, l’ PTi 14−17, l” PTi 17−19 and a claw; palptarsus (length 12−14, width 9−12) with three setae a 5−7, b 5−6, c 6−8; 1 spinneret suζ length 4−6 width 2−4; 1 solenidion ω 5−7; two eupathidion ul’ζ 4−6, ul”ζ 5−7.

Leg ( Figures 33−36 View Figures 28-36 ): Leg I length 219−258, leg II length 172−198, leg III length 167−192, leg IV length 219−252, (from trochanter to tarsus). Setal pattern on leg I–IV coxa 2−2−1−1, trochanter 1−1−1−1, femur 10−6−4−4, genu 5−5−4−4, tibia 9 (1) −7−6−7, tarsus 13(1) +2 duplex setae- 13(1) + 1 duplex setae−9 (1)−9 (1). Tarsi 1 with 10 tactile setae, 3 eupathidia, 1 solenidion and 2 sets of proximal duplex setae, 1 tactile seta and one solenidion proximal to the proximal duplex setae; tarsi II with 9 tactile setae, 3 eupathidia, 1 solenidion, 1 set of duplex setae, 1 tactile seta adjacent to duplex setae; tarsi III and IV each having 9 tactile setae and 1 solenidion. Empodia of leg I–IV each with a prominent spur and split into 3 pairs of proximoventral hairs.

Male

Aedeagus ( Figures 40 View Figures 37-40 , 43 View Figures 41-43 ):Aedeagus knob lacking anterior projection, posterior projection with blunted tip directed