Calvittacus chenius, XUE, XIAO-FENG, WANG, ZHEN, SONG, ZI-WEI & HONG, XIAO-YUE, 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 : 48-51

Calvittacus chenius sp. nov.

(Figs 12 & 13)

Description. FEMALE: (n = 1, dorsal view) Body fusiform, 160, 53 wide; light yellow. Gnathosoma 23, projecting obliquely down, pedipalp coxal seta (ep) 2, dorsal pedipalp genual seta (d) 7, cheliceral stylets 20. Prodorsal shield 37, 40 wide; anterior shield lobe broad; with incomplete parallel admedian lines and a transverse short line at base. Scapular tubercles ahead of rear shield margin, 21 apart, scapular setae (sc) 15, projecting up from the axis of body. Coxal plates smooth, anterolateral setae on coxisternum І (1b) 6, 9 apart, proximal setae on coxisternum І (1a) 16, 10 apart, proximal setae on coxisternum І (2a) 33, 24 apart. Prosternal apodeme 4. Legs with usual series of setae. Leg І 28, femur 8, basiventral femoral seta (bv) 8; genu 4, antaxial genual seta (l'') 23; tibia 5, paraxial tibial seta (l') 4, located at center from proximal tibial margin; tarsus 5, seta ft' 18, seta ft'' 21, seta u' 4; tarsal empodium (em) 5, simple, 5-rayed, tarsal solenidion (ω) 6, knobbed. Leg І 22, femur 6, basiventral femoral seta (bv) 7; genu 3, antaxial genual seta (l'') 5; tibia 3; tarsus 4, seta ft' 4, seta ft'' 15, seta u' 3; tarsal empodium (em) 4, simple, 5-rayed, tarsal solenidion (ω) 6, knobbed. Opisthosoma: opisthosoma dorsally with 11 annuli, first 7 annuli form large bands, of which the first 3 annuli with bands separated at center and with irregular filament microtubercles, ventrally with 55 annuli, with round microtubercles. Setae c2 12 on ventral annulus 6, 41 apart; setae d 55 on ventral annulus 19, 35 apart; setae e 10 on ventral annulus 32, 28 apart; setae f 14 on 6th ventral annulus from rear, 13 apart. Setae h1 2, h2 28. Female genitalia 12, 22 wide, coverflap with 10 longitudinal ridges, setae 3a 14, 17 apart.

MALE: (n = 2, lateral view) Body fusiform, 140–143, 40–41 thick; light yellow. Gnathosoma 17–18, projecting obliquely down, pedipalp coxal seta (ep) 2–3, dorsal pedipalp genual seta (d) 7–8, cheliceral stylets 14–15. Prodorsal shield 32–33, a spine present underneath the frontal lobe, in lateral view. Scapular tubercles ahead of rear shield margin, scapular setae (sc) 12–13, projecting up from the axis of body. Coxal plates smooth, proximal setae on coxisternum І (2a) 30–33. Legs with usual series of setae. Leg І 22, femur 7,

basiventral femoral seta (bv) 8–9; genu 3, antaxial genual seta (l'') 17–19; tibia 4, paraxial tibial seta (l') 4, located at center from proximal tibial margin; tarsus 4, seta ft' 14–15, seta ft'' 18-18, seta u' 3; tarsal empodium (em) 4, simple, 5-rayed, tarsal solenidion (ω) 5–6, knobbed. Leg І 19 (26–28), femur 6, basiventral femoral seta (bv) 6–7; genu 3, antaxial genual seta (l'') 3; tibia 2; tarsus 4, seta ft' 5–6, seta ft'' 19–20, seta u' 2; tarsal empodium (em) 4, simple, 5-rayed, tarsal solenidion (ω) 6, knobbed. Opisthosoma: opisthosoma dorsally with 9 annuli, first 7 annuli form large bands, ventrally with 54 annuli, with round microtubercles. Setae c2 10–13 on ventral annulus 7; setae d 48–49 on ventral annulus 19; setae e 7–8 on ventral annulus 32; setae f 12 on 6th ventral annulus from rear. Setae h1 2, h2 40–45. Male genitalia with setae 3a 25.

NYMPH: (n = 1, dorsal view) Body fusiform, 160, 41 wide; light yellow. Gnathosoma 19, projecting obliquely down, pedipalp coxal seta (ep) 3, dorsal pedipalp genual seta (d) 6, cheliceral stylets 17. Prodorsal shield 35, 35 wide; anterior shield lobe broad; with incomplete parallel admedian lines. Scapular tubercles near rear shield margin, 18 apart, scapular setae (sc) 12, projecting up from the axis of body. Coxal plates smooth, anterolateral setae on coxisternum І (1b) 5, 7 apart, proximal setae on coxisternum І (1a) 10, 5 apart, proximal setae on coxisternum І (2a) 15, 18 apart. Prosternal apodeme 4. Legs with usual series of setae. Leg І 22, femur 6, basiventral femoral seta (bv) 6; genu 3, antaxial genual seta (l'') 18; tibia 3, paraxial tibial seta (l') 4, located at center from proximal tibial margin; tarsus 4, seta ft' 15, seta ft'' 17, seta u' 3; tarsal empodium (em) 5, simple, 5-rayed, tarsal solenidion (ω) 6, knobbed. Leg І 20, femur 6, basiventral femoral seta (bv) 6; genu 3, antaxial genual seta (l'') 3; tibia 2; tarsus 4, seta ft' 5, seta ft'' 19, seta u' 2; tarsal empodium (em) 5, simple, 5-rayed, tarsal solenidion (ω) 6, knobbed. Opisthosoma: opisthosoma dorsally with 12 annuli, first 8 annuli form large bands, of which first 3 annuli with bands separate at center and with irregular filament microtubercles, ventrally with 45 annuli, with round microtubercles. Setae c2 11 on ventral annulus 7, 40 apart; setae d 40 on ventral annulus 18, 30 apart; setae e 8 on ventral annulus 27, 19 apart; setae f 10 on 5th ventral annulus from rear, 12 apart. Setae h1 2, h2 38. Female genitalia with setae 3a 10, 8 apart.

Type material. Holotype, female (slide number NJAUAcariEri756, marked Holotype), from Quercus chenii (Fagaceae) , Wuhan City, Hubei Province, P. R. China, 30°58'07" N, 114°41'20" E, 5 October 2006, coll. Zi-Wei Song. Paratypes, 2 males and 1 nymph (slide number NJAUAcariEri756) with the same data as holotype.

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

Etymology. The specific designation chenius is from the species name of the host plant, chenii .

Differential diagnosis. This species is similar to C. regiae Xue, Song & Hong, 2006b , but can be differentiated from the latter by scapular setae projecting up from the axial of body (scapular setae projecting centrad in C. regiae ), coxal plates smooth (coxal plates with short lines in C. regiae ), first three dorsal annuli broken at center (dorsan annuli continuous in C. regiae ).