Aculus changbais, Xue, Xiao-Feng, Song, Zi-Wei & Hong, Xiao-Yue, 2008

Xue, Xiao-Feng, Song, Zi-Wei & Hong, Xiao-Yue, 2008, Eight new species of the genus Aculus Keifer (Acari: Eriophyidae) from China, Zootaxa 1721, pp. 35-52 : 41-42

Aculus changbais sp. nov.

( Fig. 3 )

Description. FEMALE: (n = 12) Body fusiform, 230 (195–231), 63 (58–63) wide, 60 (58–61) thick; light yellow. Gnathosoma 35 (33–35), projecting obliquely down, pedipalp coxal setae (ep) 3 (3–4), dorsal pedipalp genual setae (d) 10 (10–11), cheliceral stylets 33 (30–33). Prodorsal shield 40 (40–41), 47 (44–47) wide; subtriangular; anterior shield lobe broad; median line present on basal 1/3 of shield and is apically connected with admedian lines, admedian and submedian lines complete, connected at basal 2/3, connecting line extending outwards. Scapular tubercles on rear margin, 31 (30–31) apart, scapular setae (sc) 20 (18–21) projecting posteriorly. Coxal plates with short lines; anterolateral setae on coxisternum І (1b) 10 (10–11), proximal setae on coxisternum І (1a) 27 (23–27), proximal setae on coxisternum І (2a) 37 (32–38). Prosternal apodeme present. Legs with usual series of setae. Legs І 39 (35–39), femur 12 (11–12), basiventral femoral setae (bv) 11 (11–12); genu 5 (4–5), antaxial genual setae (l'') 27 (24–27); tibia 10 (10–11), paraxial tibial setae (l') 10 (9–10), setae located 1/3 from proximal tibial margin; tarsus 6 (5–6); tarsal empodium simple, 6-rayed, tarsal solenidion tapered. Legs І 32 (29–33), femur 9 (8–9), basiventral femoral setae (bv) 10 (10–11); genu 5 (4– 5), antaxial genual setae (l'') 10 (9–10); tibia 7 (6–7); tarsus 6 (5–6); tarsal empodium simple, 6-rayed, tarsal solenidion tapered. Opisthosoma: opisthosoma dorsally with 45 (44–48) annuli, with elliptical microtubercles, ventrally with 73 (65–73) annuli, with round microtubercles. Setae c2 30 (30–35) on ventral annulus 12 (11–12); setae d 59 (56–65) on ventral annulus 27 (26–28); setae e 38 (32–40) on ventral annulus 44 (43–45), setae f 34 (32–35) on 6th ventral annulus from rear. Setae h1 3 (3–4). Female genitalia 15 (14–15), 21 (21– 22) wide, coverflap with 8 longitudinal ridges, proximal setae on coxisternum ІІІ (3a) 38 (33–40).

MALE: (n = 1) Body fusiform, 180, 55 wide; light yellow. Gnathosoma 28, projecting obliquely down, pedipalp coxal setae (ep) 3, dorsal pedipalp genual setae (d) 8, cheliceral stylets 26. Prodorsal shield 34, 38 wide; semicircular. Scapular tubercles on rear margin, 28 apart, scapular setae (sc) 18 projecting posteriorly. Coxal plates with short lines; anterolateral setae on coxisternum І (1b) 6, proximal setae on coxisternum І (1a) 16, proximal setae on coxisternum І (2a) 29. Prosternal apodeme present. Legs with usual series of setae. Leg І 31, femur 10, basiventral femoral setae (bv) 11; genu 4, antaxial genual setae (l'') 18; tibia 8, paraxial tibial setae (l') 9, setae located 1/3 from proximal tibial margin; tarsus 4; tarsal empodium simple, 6- rayed, tarsal solenidion tapered. Leg І 26, femur 8, basiventral femoral setae (bv) 8; genu 4, antaxial genual setae (l'') 7; tibia 5; tarsus 4; tarsal empodium simple, 6-rayed, tarsal solenidion tapered. Opisthosoma: opisthosoma dorsally with 40 annuli, with elliptical microtubercles, ventrally with 56 annuli, with round microtubercles. Setae c2 28 on ventral annulus 11; setae d 48 on ventral annulus 23; setae e 31 on ventral annulus 38, setae f 28 on 6th ventral annulus from rear. Setae h1 3. Male genitalia 15 wide, proximal setae on coxisternum ІІ (3a) 17.

Type material. Holotype, female, China: Jilin Province, Changbai Mountain, 42.03°N, 128.05°E, elevation 1092m. June 26, 2006, from Salix gracilistyla Miq. (Salicaceae) , coll. Xue, Xiao-Feng and Song, Zi-Wei. Paratypes, 11 females and 1 male, with the same data as holotype.

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

Etymology. The specific designation changbais is from the location of the host plant and where the mites were collected, Changbai Mountain.

Differential diagnosis. This species is similar to A. salicis Kuang & Luo, 1997 , but can be differentiated by median line incomplete (median line complete in A. salicis ), empodium 6-rayed (empodium 4-rayed in A. salicis ).

Figures

FIGURE 3. Aculus changbais sp. nov. D, dorsal view of female; CG, coxae and female genitalia; L 1, legs І; L 2, legs І; LO, lateral microtubercles; em, empodium; GM, male genitalia.