Tetra coriariae, Xue, Xiao-Feng, Song, Zi-Wei & Hong, Xiao-Yue, 2007

Xue, Xiao-Feng, Song, Zi-Wei & Hong, Xiao-Yue, 2007, Six new species of Te t r a Keifer (Acari: Eriophyidae: Phyllocoptinae) from China, Zootaxa 1614, pp. 1-16 : 4-7

Tetra coriariae sp. nov.

( Fig. 2 )

Description. FEMALE: (n = 5) Body fusiform, 215 (209–225), 69 (68–70) wide, 70 (69–71) thick; light yellow. Gnathosoma 23 (21–26), projecting obliquely down, pedipalp coxal setae (ep) 3 (2–3), dorsal pedipalp genual setae (d) 6 (5–6), chelicerae 20 (18–21), oral stylets 17 (17–18). Prodorsal shield 42 (40–45), 58 (56– 59) wide; subtriangular; frontal lobe present; median, admedian and submedian lines robust and connected, form 7 cells, 3 cells up and 4 cells under. Dorsal tubercles on rear margin, 35 (34–35) apart, scapular setae (sc) 6 (6–7) projecting posteriorly. Coxal area with granules; anterolateral setae on coxisternum І (1b) 7 (7–8), proximal setae on coxisternum І (1a) 21 (21–22), proximal setae on coxisternum І (2a) 30 (27–34). Prosternal apodeme present. Legs with usual series of setae. Legs І 30 (28–32), femur 9 (8–9), basiventral femoral setae (bv) 11 (11–12); genu 4 (4–5), antaxial genual setae (l'') 21 (19–22); tibia 8 (7–9), paraxial tibial setae (l') 4 (4–5), setae located 1/4 from dorsal base; tarsus 5 (5–6); empodium simple, 4-rayed, tarsal solenidion knobbed. Legs І 27 (25–29), femur 8 (7–8), basiventral femoral setae (bv) 9 (7–10); genu 4 (3–4), antaxial genual setae (l'') 6 (6–7); tibia 6 (5–6); tarsus 5 (4–5); empodium simple, 4-rayed, tarsal solenidion knobbed. Opisthosoma: dorsal opisthosoma with 27 (26–29) annuli, with faint round microtubercles laterally, ventrally with 65 (63–69) annuli, with round microtubercles. Setae c2 32 (31–34) on ventral annulus 13 (12–13); setae d 62 (61–63) on ventral annulus 27 (27–28), 33 (32–35) apart; setae e 25 (23–26) on ventral annulus 46 (44– 48), 19 (17–20) apart, setae f 28 (26–31) on 6th ventral annulus from rear, 18 (18–19) apart. Setae h1 3 (3–4), setae h2 52 (50–54). Female genitalia 15 (15–16), 21 (20–21) wide, coverflap with 12 longitudinal ridges, proximal setae on coxisternum ІІ (3a) 18 (16–20).

MALE: (n = 2) Body fusiform, 156–175, 55–65 wide, light yellow. Gnathosoma 21–23, projecting obliquely down, pedipalp coxal setae (ep) 2–3, dorsal pedipalp genual setae (d) 5–6, chelicerae 17–18, oral stylets 16–17. Prodorsal shield 39–40, 57–59 wide; subtriangular; frontal lobe present. Dorsal tubercles on rear margin, 30–31 apart, scapular setae (sc) 5–6 projecting posteriorly. Coxal area with granules; anterolateral setae on coxisternum І (1b) 6–7, proximal setae on coxisternum І (1a) 10–13, proximal setae on coxisternum І (2a) 18–23. Prosternal apodeme present. Legs with usual series of setae. Legs І 28–29, femur 8–9, basiventral femoral setae (bv) 10–11; genu 4–5, antaxial genual setae (l'') 15–17; tibia 7–8, paraxial tibial setae (l') 4–5, setae located 1/4 from dorsal base; tarsus 4–5; empodium simple, 4-rayed, tarsal solenidion knobbed. Legs І 25–26, femur 7–8, basiventral femoral setae (bv) 7–8; genu 3–4, antaxial genual setae (l'') 5–6; tibia 4–5; tarsus 4–5; empodium simple, 4-rayed, tarsal solenidion knobbed. Opisthosoma: dorsal opisthosoma with 25–27 annuli, smooth, ventrally with 60–62 annuli, with round microtubercles. Setae c 2 20–22 on ventral annulus 11–12; setae d 38–41 on ventral annulus 26–27; setae e 15–17 on ventral annulus 43–44, setae f 18–20 on 6th ventral annulus from rear. Setae h1 3–4. Male genitalia 5–6, 18–19 wide, proximal setae on coxisternum ІІІ (3a) 13–15.

Types. Holotype, female, China: Shaanxi Province, Yang County, Huayang, 33.58°N, 107.53°E. August 11, 2005, from Coriaria nepalensis Wall. (Coriariaceae) , coll. Xue, Xiao-Feng and Song, Zi-Wei. Paratypes, 4 females and 2 males, with the same data as holotype.

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

Etymology. The specific designation coriariae is from the generic name of the host plant, Coriaria .

Remarks. This species is similar to Tetra sinicae Li, Wei & Wang, 2006 , but can be differentiated by coxal area with granules (coxal area smooth in T. sinicae ), dorsal annuli with faint microtubercles (dorsal annuli smooth in T. sinicae ), female genital coverflap with 2 transverse lines at base (female genital coverflap smooth at base in T. sinicae ).

Figures

FIGURE 2. Tetra coriariae sp. nov. A, dorsal view of female; B, coxae and female genitalia; C, legs І and І; D, empodium; E, male genitalia; F, lateral view of anterior region; G, lateral microtubercles; H, lateral view of the caudal opisthosoma.