Shevtchenkella ulmi ( Farkas, 1960 )

Shevtchenkella ulmi ( Farkas, 1960) , rec. nov.

(Figs 18–19)

Oxypleurites ulmi Farkas, 1960: 330–331 .

Tegonotus ulmi ; Newkirk & Keifer, 1971: 7–8.

Shevtchenkella ulmi ; Bagdasarian, 1978: 938.

Shevtchenkella ulmi ; Amrine & Stasny, 1994: 287.

Description. FEMALE: (n = 2, dorsal view) Body fusiform, 148–152, 69–70 wide; light yellow. Gnathosoma 13– 15, projecting obliquely down, pedipalp coxal seta ( ep) 2–3, dorsal pedipalp genual seta ( d) 5–6, cheliceral stylets 12–13. Prodorsal shield 51–52, 67–69 wide, admedian and submedian lines incomplete and parallel; anterior shield lobe broad. Scapular tubercles on rear shield margin, 33–35 apart, scapular setae ( sc) 7–8, projecting posterior. Coxigenital region with 16–17 smooth annuli. Coxal plates with short lines, anterolateral setae on coxisternum І ( 1b) 9–10, 11–12 apart, proximal setae on coxisternum І ( 1a) 14–15, 8–9 apart, proximal setae on coxisternum І ( 2a) 18–20, 21–23 apart, tubercles 1b and 1a apart 7–8, tubercles 1a and 2a 5–6 apart. Prosternal apodeme absent. Legs with usual series of setae. Leg І 25–27, femur 10–11, basiventral femoral seta ( bv) 7–8; genu 3–4, antaxial genual seta ( l ') 15–17; tibia 5–6, paraxial tibial seta ( l ') 2–3, located at 1/3 from dorsal base; tarsus 5– 6, seta ft ' 15–16, seta ft ' 15–17, seta u ' 3–4; tarsal empodium ( em) 5–6, simple, 4-rayed, tarsal solenidion (ω) 7–8, knobbed. Leg І 23–25, femur 8–9, basiventral femoral seta ( bv) 6–7; genu 3–4, antaxial genual seta ( l ') 4–5; tibia 5–6; tarsus 5–6, seta ft ' 4–5, seta ft ' 18–20, seta u ' 3–4; tarsal empodium ( em) 5–6, simple, 4-rayed, tarsal solenidion (ω) 5–6, knobbed. Opisthosoma: dorsally with 17 annuli, with three ridges, ventrally with 56–58 annuli, with elliptical microtubercles on rear annular margins. Setae c2 18–20 on ventral annulus 12–13, 55–57 apart; setae d 48–53 on ventral annulus 23–24, 32–35 apart; setae e 8–10 on ventral annulus 35–36, 12–13 apart, setae f 23–25 on 5th ventral annulus from rear, 18–20 apart. Setae h1 2–3, h2 56–60. Female genitalia 10–11, 18– 20 wide, coverflap with 9 longitudinal ridges, setae 3a 15–17, 16–17 apart.

MALE: (n = 1, dorsal view) Body fusiform, 129, 55 wide; light yellow. Gnathosoma 13, projecting obliquely down, pedipalp coxal seta ( ep) 2, dorsal pedipalp genual seta ( d) 5, cheliceral stylets 10. Prodorsal shield 45, 53 wide, admedian and submedian lines incomplete and parallel; anterior shield lobe broad. Scapular tubercles on rear shield margin, 28 apart, scapular setae ( sc) 6, projecting posterior. Coxigenital region with 13 smooth annuli. Coxal plates with short lines, anterolateral setae on coxisternum І ( 1b) 8, 10 apart, proximal setae on coxisternum І ( 1a) 21, 7 apart, proximal setae on coxisternum І ( 2a) 32, 20 apart, tubercles 1b and 1a apart 6, tubercles 1a and 2a 6 apart. Prosternal apodeme absent. Legs with usual series of setae. Leg І 23, femur 8, basiventral femoral seta ( bv) 6; genu 3, antaxial genual seta ( l ') 16; tibia 5, paraxial tibial seta ( l ') 3, located at 1/3 from dorsal base; tarsus 5, seta ft ' 20, seta ft ' 18, seta u ' 3; tarsal empodium ( em) 5, simple, 4-rayed, tarsal solenidion (ω) 6, knobbed. Leg І 20, femur 6, basiventral femoral seta ( bv) 8; genu 3, antaxial genual seta ( l ') 4; tibia 5; tarsus 5, seta ft ' 5, seta ft ' 180, seta u ' 3; tarsal empodium ( em) 5, simple, 4-rayed, tarsal solenidion (ω) 6, knobbed. Opisthosoma: dorsally with 17 annuli, with three ridges, ventrally with 52 annuli, with elliptical microtubercles on rear annular margins. Setae c2 12 on ventral annulus 11, 43 apart; setae d 42 on ventral annulus 20, 30 apart; setae e 12 on ventral annulus 32, 14 apart, setae f 19 on 5th ventral annulus from rear, 13 apart. Setae h1 2, h2 68. Male genitalia 17 wide, setae 3a 14, 13 apart.

Material examined. 2 females and 1 male (slide number NJAUAcariEriH63-2), from Ulmus sp. L. ( Ulmaceae ), Harbin City , Heilongjiang Province, P. R. China, 26 July 2008, coll. Xiao-Feng Xue, Zhen Wang & Zi- Wei Song .

Hosts. Ulmus davidiana var. japonica (Sarg. ex Rehder) Nakai , Ulmus densa Litv. , Ulmus glabra Huds. , Ulmus laevis Pall. , Ulmus minor Mill. , Ulmus sp. (Ulmaceae) .

Relation to host. Vagrant on leaf surface. No damage to the host was observed.

Distribution. China ( Heilongjiang), England, Hungary, Iran, Japan, Portugal.

Note. This species occurred together with Peralox dentatis sp. nov.