Eutetranychus spinosus, Kamran, Muhammad, Khan, Eid Muhammad & Alatawi, Fahad Jaber, 2018

Kamran, Muhammad, Khan, Eid Muhammad & Alatawi, Fahad Jaber, 2018, The spider mites of the genus Eutetranychus Banks (Acari, Trombidiformes, Tetranychidae) from Saudi Arabia: two new species, a re-description, and a key to the world species, ZooKeys 799, pp. 47-88 : 47

Eutetranychus spinosus sp. n. Figures 1, 2, 3, 4−7, 8, 9, 10, 11, 12-15

Diagnosis.

(Based on female). Dorsal body setae long, slender, serrate, all set on small tubercles except v2 and sc1, dorsocentral setae c1, e1 and f1 longer than the distance between their base and the bases of next consecutive setae; setae c1 and f1 shorter than distances between c1−c1 and f1−f1 respectively, setae e1 almost as long as distance e1−e1; dorsum with simple striae except area anterior to setae sc1 with lobed striae, striae between setae d1 “V” shaped, genua and tibiae I−IV 5−5−3−3; 9(1)−7−8−8, respectively.

Description.

Female (n = 12) (Figures 1-7).

Body oval, color in life greenish yellow. Length of body (excluding gnathosoma) 315 (312−325), (including gnathosoma) 396 (390−405), maximum width 221 (218−231).

Dorsum (Figure 1). Propodosoma medially with longitudinal striae; hysterosoma medially with transverse striae except area between setae d1 and e1 forming a V-shaped pattern; dorsal striae simple except anterior of setae sc1 with small lobes; all dorsal setae slender, serrated and sub-equal in length, setae sc2 and hysterosomal setae set on small tubercles; setae v2 almost reaching 2/3 to the distance v2−v2; dorsocentral setae c1, and f1 reaching to past bases of next consecutive setae; setae e1 almost as long as distance e1−f1; setae f1 slightly more widely spaced than e1. Length of dorsal setae: v2 44 (41−45), sc1 56 (53−58), sc2 44 (42−46), c1 50 (47−52), c2 44 (42−45), c3 46 (45−48), d1 53 (51−55), d2 47 (45−49), e1 47 (46−48), e2 44 (42−45), f1 48 (47−50), f2 42 (40−44), h1 42 (40−44); distance between dorsal setae: v2−v2 66 (63−68), sc1−sc1 95 (91−97), sc2−sc2 165 (162−170), c1−c1 63 (60−67), c2−c2 147 (142−150), c3−c3 200 (195−210), d1−d1 95 (92−97), d2−d2 189 (186−191), e1−e1 53 (50−55), e2−e2 158 (155−160), f1−f1 58 (55−64), f2−f2 79 (77−82), h1−h1 34 (33−36), v2−sc1 42 (40−44), sc1−sc2 50 (48−53), sc2−c3 45 (44−47), sc2−c2 53 (52−55), sc2−c1 95 (93−98), c1−c2 44 (42−46), c2−c3 33 (32−36), c1−d1 37 (36−39), c2−d2 68 (66−70), d1−e1 51 (49−52), d2−e2 59 (57−60), e1−f1 42 (40−44), e2−f2 48 (46−50), f1−h1 39 (36−41), f2−h1 25 (22−27).

Venter (Figure 2). Ventral cuticle medially with transverse striae from setae 1a to setae g1, length of ventral setae: 1a 50 (48−53), 3a 42 (41−44), 4a 44 (43−46), 1b 42 (40−45), 1c 45 (41−46), 2b 42 (40−43), 2c 39 (37−41), 3b 47 (45−49), 4b 42 (41−43); distance between intercoxal and coxae setae: 1a−1a 37 (35−38), 1b−1c 17 (17−18), 3a−3a 79 (77−80), 4a−4a 75 (73−78); aggenital setae: ag 37 (37−38), ag−ag 54 (49−57); genital setae: g1 31 (30−33), g2 32 (31−34), g1−g1 26 (23−28), g2−g2 60 (57−61); anal setae two pairs: ps1 12 (12−13), ps2 12 (11−13), ps1−ps2 8 (8−9), ps1−ps1 21 (20−23), ps2−ps2 17 (17−18); para-anal setae two pairs h2 21 (19−22), h3 19 (18−19), h2−h2 25 (23−26), h3−h3 45 (40−45). All ventral setae simple except h2 and h3 barbed. Spermatheca elongated and sacculus terminally rounded (Figure 2C).

Gnathosoma (Figure 3). Subcapitular setae m 41 (39−43), m−m 31 (29−32) (Figure 2). Palp femur and genu each with one setae d 51 (49−55), l" 43 (40−45); palp tibia with three setae d 34 (31−34), l" 21 (20−22), l’ 13 (13−14) and a palp tibial claw; palp tarsus 17(17−18) long, 13 wide, with 3 simple setae a 13 (12−13), b 9 (9−10), c 13 (13−14), 3 eupathidia suζ 7.5 (7.5−8), width 1.3 (1−1.5), ul’’ ζ = ul’ζ 6.5 (6.5−7) width 1.2 (1−1.3), a solenidion ω 5 long width 2 (1.8−2.3) (Figure 3). Stylophore anteriorly rounded; peritremes ending with simple bulb (Figure 1).

Legs (Figures 4-7). Length of legs I−IV (trochanter to pretarsus): 320 (313−323), 263 (255−270), 294 (288−300), 336 (325−340) respectively; leg I: trochanter 21 (19−21), femur 105 (100−109), genu 53 (51−55), tibia 63 (60−68), tarsus 79 (74−82); leg II: trochanter 16 (15−17), femur 95 (91−99), genu 42 (41−44), tibia 53 (51−55), tarsus 58 (54−60); leg III: trochanter 17 (17−18), femur 86 (84−90), genu 44 (42−47), tibia 71 (68−75), tarsus 76 (74−79); leg IV: trochanter 19 (18−20), femur 105 (102−108), genu 47 (45−50), tibia 79 (76−83), tarsus 86 (83−90); legs chaetotaxy I−IV (eupathidia and solenidia in parenthesis): coxae 2−2−1−1; trochanters 1−1−1−1; femora 7−6−2−1; genua 5−5−3−3; tibiae 9(1)−7−8−8; tarsi 12(3ζ, 3ω)−10(3ζ, 2ω)−10(1ω)−10(1ω).

Male (n = 3) (Figures 8-15).

Length of body (excluding gnathosoma) 300−310, (including gnathosoma) 350−361, maximum width 237−246.

Dorsum (Figure 8). Propodosoma medially with longitudinal striae; hysterosoma medially with transverse to irregular striae and forming a V-shaped pattern in between setae d1 and e1; all dorsal body setae slender, serrated and sub-equal in length, hysterosomal setae set on small tubercles. Length of dorsal setae: v2 34−38, sc1 35−40, sc2 32−37, c1 31−35, c2 36−39, c3 32−35, d1 29−32, d2 33−35, e1 33−38, e2 32−35, f1 28−33, f2 33−37, h1 23−26, h2 15−19, h3 13−16; distance between dorsal setae: v2−v2 45−50, sc1−sc1 73−80, sc2−sc2 162−173, c1−c1 44−47, c2−c2 112−120, c3−c3 150−162, d1−d1 65−70, d2−d2 136−151, e1−e1 37−41, e2−e2 90−100, f1−f1 35−40, f2−f2 55−60, h1−h1 14−17, h2−h2 10−13, h3−h3 32−36, v2−sc1 28−32, sc1−sc2 32−33, sc2−c3 55−60, sc2−c2 45−50, sc2−c1 55−60, c1−c2 30−34, c2−c3 22−26, c1−d1 39−43, c2−d2 50−56, d1−e1 42−46, d2−e2 35−40, e1−f1 20−24, e2−f2 35−40, f1−h1 36−41, f2−h1 25−30.

Venter (Figure 9). Area between setae 1a to ag with transverse striae; length of ventral setae: 1a 30−33, 3a 31−35, 4a 32−37, 1b 40−45, 1c 40−45, 2b 30−33, 2c 37−41, 3b 36−39, 4b 36−41; distance between setae: 1a−1a 30−36, 1b−1c 17−18, 3a−3a 62−68, 4a−4a 51−58; aggenital setae: ag 15−18, ag−ag 49−54; genital setae: g1 9−13, g2 8−10, g1−g1 14−17, g2−g2 15−18; anal setae two pairs: ps1 10−12, ps2 11−13, ps1−ps2 3−4, ps1−ps1 24−28, ps2−ps2 22−26.

Gnathosoma (Figure 10). Subcapitular setae m 30−34, m−m 27−31 (Figure 9); palp femur and genu each with one setae d 35−41, l" 31−35; palp tibia with three setae d 18−22, l" 21−25, l’ 13−14 and a palp tibial claw; palp tarsus 11−14 long, 10 wide, with 3 simple setae a 9−11, b 7−10, c 8−10, 3 eupathidia suζ 6.5−7, width 0.9 (0.8−1), ulζ = ul’ζ 6−7, width 0.8 (0.7−1) a solenidion ω 4 long width 1 (0.9−1.2) (Figure 10). Stylophore anteriorly rounded; peritremes ending with simple bulb (Figure 8).

Aedeagus (Figure 11) Aedeagus bends dorsad at an angle of 90°; the bent portion narrowly rounded toward tip and blunt distally, shaft 18 long, 7 wide, bent portion 3 long.

Legs (Figures 12-15). Length of legs I−IV (trochanter to pretarsus): 313−328, 235−250, 263−280, 278−295 respectively; legs I−IV chaetotaxy (eupathidia and solenidia in parenthesis): coxae 2−2−1−1; trochanters 1−1−1−1; femora 8−7−4−3; genua 5−5−4−4; tibiae 8(4)−7(3)−8−8; tarsi 11(3ζ, 2ω)−11(3ζ, 2ω)−10(1ω)−10(1ω).

Immature stages.

unknown.

Etymology.

The species name is derived from name of the host plant species, Indigofera spinosa , of which type specimens were collected.

Type material.

Holotype female and four paratype females, Indigofera spinosa ( Leguminosae ), Al- Shifa road, Taif, 21°05.824'N, 040°19.111'E, elevation 2102 m, 11 Oct 2016, leg. M Kamran and M Rehman; five paratype females, Indigofera spinosa ( Leguminosae ), As Sayl Saghir, Taif, 21°30.521'N, 040°28.202'E, elevation 1516 m, 10 Sept 2017, leg. Eid M Khan and M Rehman; two paratype females, Indigofera spinose ( Leguminosae ), Al Sayl Kabeer, Taif, 21°37.371'N, 040°24.212'E, elevation 1240 m, 15 Sept 2017, leg. Eid M Khan and M Rehman.

Remarks.

Eutetranychus spinosus sp. n. belongs to the banksi species group. It closely resembles E. namibianus Meyer 1987 because both have same legs chaetotaxy (Table 1) and dorsal striae pattern. However, the new species differs from E. namibianus by all dorsal setae slender, much longer, mostly longer than the distance between their base and the bases of next consecutive setae vs. all dorsal setae sub-spatulate, small, far behind the bases of next consecutive setae, setae c1 and e1 crossing the bases of next consecutive setae vs. reaching less than half distance to the bases of setae next in line and all hysterosomal setae set on strong tubercles vs. only some setae on opisthosoma set on tubercles in E. namibianus . The new species also resembles E. acaciae Miller 1966 because both have all dorsal setae slender, much longer, and mostly longer than the distance between their base and the bases of next consecutive setae. The new species can be separated from E. acaciae by setae f1 slightly more widely spaced as setae e1 vs. f1 two time more widely spaced as compare to e1, differences in legs chaetotaxy, genua I−IV with 5−5−4/3−3 vs. 3−3−1−1 and femora II & III with 6 & 2 vs. 4 & 3, respectively in E. acaciae .