Bariella spinishieldis, Xue, Wang, Song & Hong, 2009

XUE, XIAO-FENG, WANG, ZHEN, SONG, ZI-WEI & HONG, XIAO-YUE, 2009, Eriophyoid mites on Fagaceae with descriptions of seven new genera and eleven new species (Acari: Eriophyoidea), Zootaxa 2253 (1), pp. 1-95 : 12-15

Bariella spinishieldis sp. nov.

(Figs 1 & 2)

Description. FEMALE: (n = 5) Body fusiform, 182 (180–186), 51 (50–53) wide, 63 (63–64) thick; light yellow. Gnathosoma 35 (35–36), projecting obliquely down, pedipalp coxal seta (ep) 4 (3–4), dorsal pedipalp genual seta (d) 10 (10–11), cheliceral stylets 28 (28–30). Prodorsal shield 61 (59–62), 63 (60–66) wide, with two long projections at posterior margin, projections 18 (15–30); anterior shield lobe broad; median line absent, admedian lines parallel, submedian lines form a large “U” shape, there are many little pits on prodorsal shield. Scapular tubercles and setae (sc) absent. Coxal plates with few short lines, coxisternum І with a large “U” shape line; anterolateral setae on coxisternum І (1b) 6 (6–7), 12 (12–13) apart, proximal setae on coxisternum І (1a) 16 (15–17), 12 (12–13) apart, proximal setae on coxisternum І (2a) 26 (23–31), 22 (22–23) apart. Prosternal apodeme absent. Legs with seta u' absent. Leg І 31 (30–33), femur 9 (8–9), basiventral femoral seta (bv) 12 (12–13); genu 4 (4–5), antaxial genual seta (l'') 19 (18–20); tibia 7 (7–8), paraxial tibial seta (l') 5 (5–6), located at 2/3 from proximal tibial margin; tarsus 5 (5–6), seta ft' 18 (18–25), seta ft'' 20 (20–23), seta u' absent; tarsal empodium (em) 6 (5–6), simple, 7-rayed, tarsal solenidion (ω) 8 (7– 8), rod-like. Leg І 28 (27–29), femur 7 (7–8), basiventral femoral seta (bv) 12 (11–13); genu 4 (3–4), antaxial genual seta (l'') 6 (6–7); tibia 5 (5–6); tarsus 5 (5–6), seta ft' 6 (5–6), seta ft'' 18 (18–23), seta u' absent; tarsal empodium (em) 7 (6–7), simple, 7-rayed, tarsal solenidion (ω) 9 (8–9), rod-like. Opisthosoma: opisthosoma dorsally with 28 (28–30) annuli, with a wide furrow, with spiny microtubercles laterally, the 4 th dorsal annulus from rear broad and projected from the body, ventrally with 48 (48–54) annuli, with spiny microtubercles. Setae c2 15 (13–18) on ventral annulus 6 (5–6), 52 (52–53) apart; setae d 50 (42–53) on ventral annulus 15 (15–16), 35 (34–35) apart; setae e 8 (7–8) on ventral annulus 28 (27–28), 17 (16–17) apart, setae f 26 (25–28) on 6th ventral annulus from rear, 19 (19–20) apart. Setae h1 absent, h2 46 (46–51). Female genitalia 11 (11– 12), 18 (17–18) wide, coverflap with two rows of ridges, 16 longitudinal ridges in each row, setae 3a 15 (15– 18), 12 (12–13) apart.

MALE: (n = 6) Body fusiform, 152–168, 47–48 wide, 41–46 thick; light yellow. Gnathosoma 25–26, projecting obliquely down, pedipalp coxal seta (ep) 2–3, dorsal pedipalp genual seta (d) 5–6, cheliceral stylets 20–21. Prodorsal shield 59–62, 60–66 wide, with two long projections at posterior margin, projections 15– 20; anterior shield lobe broad. Scapular tubercles and setae (sc) absent. Coxal plates with few lines; anterolateral setae on coxisternum І (1b) 5–7, 10–11 apart, proximal setae on coxisternum І (1a) 15–17, 10– 11 apart, proximal setae on coxisternum І (2a) 30–31, 25–26 apart. Prosternal apodeme absent. Legs with seta u' absent. Leg І 27–29, femur 8–9, basiventral femoral seta (bv) 12–13; genu 4–5, antaxial genual seta (l'') 18–20; tibia 7–8, paraxial tibial seta (l') 5–6, located at 2/3 from proximal tibial margin; tarsus 5–6, seta ft' 12– 13, seta ft'' 18–19, seta u' absent; tarsal empodium (em) 5–6, simple, 7-rayed, tarsal solenidion (ω) 7–8, rodlike. Leg І 27–28, femur 7–8, basiventral femoral seta (bv) 11–13; genu 3–4, antaxial genual seta (l'') 5–6; tibia 5–6; tarsus 5–6, seta ft' 5–6, seta ft'' 18–19, seta u' absent; tarsal empodium (em) 5–6, simple, 7-rayed, ventral annulus 5–6, 45–46 apart; setae d 42–53 on ventral annulus 15–16, 35–36 apart; setae e 6–8 on ventral annulus 27–28, 20–21 apart, setae f 25–28 on 6th ventral annulus from rear, 16–17 apart. Setae h1 absent, h2 38–40. Male genitalia 15–16 wide, setae 3a 10–12, 12–13 apart.

Type material. Holotype, female (slide number NJAUAcariEri427, marked Holotype), from Quercus sp. (Fagaceae) , The Cuihua Mountain, Xi’an City, Shaanxi Province, P. R. China, 34°59'40" N, 109°00'04" E, elevation 901m, 15 August 2005, coll. Xiao-Feng Xue and Zi-Wei Song. Paratypes, 4 females and 6 males (slide number NJAUAcariEri427), with the same data as holotype.

Additional material examined. 3 females (slide number NJAUAcariEriH5), from Quercus sp. (Fagaceae) , Jiagedaqi City, Heilongjiang Province, P. R. China, 50°24'27" N, 124°06'43" E, elevation 365m, 17 July 2008, coll. Xiao-Feng Xue, Zi-Wei Song and Zhen Wang, occurred together with Brevulacus reticulatus Manson, 1984 ; 5 females (slide number NJAUAcariEri600), from Quercus sp. (Fagaceae) , Jingbo Lake, Heilongjiang Province, P. R. China, 44°02'33" N, 128°56'35" E, 29 June 2006, coll. Xiao-Feng Xue and Zi-Wei Song; 6 females (slide number NJAUAcariEri551), from Quercus sp. (Fagaceae) , Dongling, Shenyang City, Liaoning Province, P. R. China, 41°28'48" N, 123°15'00" E, 23 June 2006, coll. Xiao-Feng Xue and Zi- Wei Song.

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

Etymology. The specific designation is combined from spiny and shield, and refers to the prodorsal shield with two large projections posteriorly.

Differential diagnosis. This species is similar to B. farnei De Lillo, 1988 , but can be differentiated from the latter by prodorsal shield with two projections posteriorly (prodorsal shield with a large posterior flange in B. farnei ), empodium 7-rayed (empodium 5-rayed in B. farnei ), and prosternal apodeme absent (prosternal apodeme present in B. farnei ).