Eight new species of the genus Aculus Keifer (Acari: Eriophyidae) from China Author Xue, Xiao-Feng Author Song, Zi-Wei Author Hong, Xiao-Yue text Zootaxa 2008 1721 35 52 journal article 10.5281/zenodo.181121 bcb15fb3-b399-4cf6-922d-3f2a206628d9 1175-5326 181121 Aculus amurens sp. nov. ( Fig. 1 ) Description. FEMALE: (n = 10) Body fusiform, 250 (240–251), 89 (87–91) wide, 86 (83–86) thick; light yellow. Gnathosoma 32 (29–32), projecting obliquely down, pedipalp coxal setae ( ep ) 3 (2–3), dorsal pedipalp genual setae ( d ) 8 (7–8), cheliceral stylets 28 (27–28). Prodorsal shield 51 (50–51), 82 (79–82) wide; subtriangular; with slight lateral lobes; anterior shield lobe apically rounded; median line absent, admedian lines concaved at center; with numerous granules. Scapular tubercles on rear margin, 41 (40–42) apart, scapular setae ( sc ) 89 (85–89) projecting posteriorly. Coxal plates with short lines; anterolateral setae on coxisternum І ( 1b ) 15 (12–15), proximal setae on coxisternum І ( 1a ) 27 (24–27), proximal setae on coxisternum І ( 2a ) 49 (45–50). Prosternal apodeme present. Legs with usual series of setae. Legs І 42 (39–43), femur 11 (11–12), with numerous granules, basiventral femoral setae ( bv ) 12 (11–13); genu 6 (6–7), with numerous granules, antaxial genual setae ( l'' ) 25 (25–27); tibia 13 (12–13), paraxial tibial setae ( l' ) 6 (6–7), setae located 1/3 from proximal tibial margin; tarsus 7 (7–8); tarsal empodium simple, 6-rayed, tarsal solenidion knobbed. Legs І 38 (34–38), femur 11 (10–11), with numerous granules, basiventral femoral setae ( bv ) 12 (10–12); genu 5 (4–5), with numerous granules, antaxial genual setae ( l'' ) 11 (10–11); tibia 10 (9–10); tarsus 6 (5–6); tarsal empodium simple, 6-rayed, tarsal solenidion knobbed. Opisthosoma : opisthosoma dorsally with 40 (41–45) annuli with elliptical microtubercles, ventrally with 76 (72–77) annuli with round microtubercles. Setae c2 45 (42– 46) on ventral annulus 13 (12–13); setae d 77 (72–77) on ventral annulus 31 (29–31); setae e 50 (47–52) on ventral annulus 52 (50–53), setae f 47 (44–47) on 5th ventral annulus from rear. Setae h1 3 (3–4). Female genitalia 16 (15–16), 29 (27–29) wide, coverflap with 12 longitudinal ridges and 2 transverse lines at base, proximal setae on coxisternum ІІ ( 3a ) 24 (21–24). MALE: (n = 3) Body fusiform, 208–217, 70–73 wide; light yellow. Gnathosoma 27–28, projecting obliquely down, pedipalp coxal setae ( ep ) 2–3, dorsal pedipalp genual setae ( d ) 5–6, cheliceral stylets 25–26. Prodorsal shield 44–45, 70–73 wide; subtriangular; anterior shield lobe broad. Scapular tubercles on rear margin, 35–36 apart, scapular setae ( sc ) 73–77 projecting posteriorly. Coxal plates with short lines; anterolateral setae on coxisternum І ( 1b ) 10–12, proximal setae on coxisternum І ( 1a ) 18–21, proximal setae on coxisternum І ( 2a ) 42–47. Prosternal apodeme present. Legs with usual series of setae. Legs І 36 –39, femur 10– 11, with numerous granules, basiventral femoral setae ( bv ) 11–12; genu 5–6, with numerous granules, antaxial genual setae ( l'' ) 21–22; tibia 10–11, paraxial tibial setae ( l' ) 5–6, setae located 1/3 from proximal tibial margin; tarsus 5–6; tarsal empodium simple, 6-rayed, tarsal solenidion knobbed. Legs І 30–34 , femur 9–10, with numerous granules, basiventral femoral setae ( bv ) 9–10; genu 4–5, with numerous granules, antaxial genual setae ( l'' ) 10–11; tibia 9–10; tarsus 5–6; tarsal empodium simple, 6-rayed, tarsal solenidion knobbed. Opisthosoma : opisthosoma dorsally with 37–40 annuli with elliptical microtubercles, ventrally with 63–67 annuli with round microtubercles. Setae c2 32–33 on ventral annulus 12–13; setae d 65–70 on ventral annulus 27–28; setae e 41–45 on ventral annulus 43–44, setae f 40–43 on 5th ventral annulus from rear. Setae h1 3–4. Male genitalia 22–23 wide, proximal setae on coxisternum ІІ ( 3a ) 15–16. Type material. Holotype , female, China : Jilin Province, Changbai Mountain, 42.03°N , 128.05°E , elevation 1092m . June 27, 2006 , from Tilia amurensis Rupr. (Tiliaceae) , coll. Xue, Xiao-Feng and Song, Zi-Wei. Paratypes , 9 females and 3 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 amurens is from the species name of the host plant, amurensis . Differential diagnosis. This species is similar to A. tiliaevagrans Boczek, 1964 , but can be differentiated by coxal area with short lines (coxal area smooth in A . tiliaevagrans ), dorsal annuli with microtubercles (dorsal annuli smooth in A . tiliaevagrans ), prodorsal shield with numerous granules (prodorsal shield without granules in A . tiliaevagrans ).