Disella itea, Wang & Wei & Yang, 2013

Disella itea n. sp.

( Fig. 3 View FIG )

TYPE MATERIAL. — Holotype: Qingliangfeng National Nature Reserve , Lin’an City (30°10’N, 119°07’E), Zhejiang Province, China, 23.VII.2007, from Itea chinensis Hook. & Arn. var. oblonga (Hand.-Mazz.) Wu ( Escalloniaceae ), coll. Guo-Quan Wang, slide-mounted, ♀ ( DPPGXU) GoogleMaps .

Paratypes: mounted on 8 slides, with the same data as holotype, 4 ♀♀ ( DPPGXU); 3 ♀♀ ( MNHN-Ac1184 , Ac1185 ) GoogleMaps .

RELATION TO HOST. — The mites are vagrant on the undersurface of the leaves, no visible damage seen.

ETYMOLOGY. — The specific designation is derived from the generic name of the type host plant.

DIAGNOSIS. — Body fusiform, white; prodorsal shield with median and admedian lines complete, submedian lines absent. Three transverse lines connect median and admedian lines forming two rows of cells; coxal plate I with granules; tarsal empodium 4-rayed, tarsal solenidion knobbed; dorsal annuli smooth, ventral annuli with elongated microtubercles; setae h1 absent; female coverflap with granules.

DESCRIPTION

Female (n = 8). Male not seen.

Body ( Fig. 3A View FIG )

Fusiform, white, 162 (138-175), 52 (40-63) wide, 39 (35-44) thick.

Gnathosoma

25 (23-28), obliquely downward; dorsal pedipalp genual setae (d) 4, pedipalp coxal setae (ep) 3; cheliceral stylets 26.

Prodorsal shield ( Fig. 3A View FIG )

40 (38-43), 55 (52-60) wide, frontal lobe present; median and admedian lines complete, submedian lines absent; three transverse lines at ∕₅, ½, ∕₅ from anterior, 1st transverse lines long, 2nd and 3rd transverse line short, forming two rows of cells. Scapular tubercles placed ahead rear margin, 26 (24-28) apart, scapular setae (sc) directed up and backward, 14 (13-15).

Coxae ( Fig. 3B View FIG )

Internal sternal apodeme present, coxisternal plates I sculptured with granules; anterolateral setae on coxisternum I (1b) absent; proximal setae on coxisternum I (1a) 9 (9-10), 8 (8-9) apart; proximal setae on coxisternum II (2a) 33 (30-35), 22 (21-23) apart. Coxal-genital annuli 3.

Legs ( Fig. 3E, F View FIG )

Tibiae fused with tarsi. Legs I 25 (22-26), trochanter 2, femur 11 (9-12), basiventral femoral setae (bv) 5 (5); genu 4 (3-4), antaxial genual setae (l’’) 24 (24-25); tarsus 8 (8), paraxial fastigial tarsal setae (ft’) 20 (18-23), antaxial fastigial tarsal setae (ft’’) 19 (18-20), paraxial unguinal tarsal setae (u’) 4 (4); tarsal empodium ( Fig. 3C View FIG ) entire, 5 (5), 4-rayed, tarsal solenidion laterally, 5 (5), knobbed. Legs II 18 (15-20), trochanter 2 (1-2), femur 8 (7-9), basiventral femoral setae (bv) 14 (13-15); genu 2 (2-3), antaxial genual setae (l’’) 7 (6-8); tarsus 6 (5-6), paraxial fastigial tarsal setae (ft’) 20 (20), antaxial fastigial tarsal setae (ft’’) 5 (5-6), paraxial unguinal tarsal setae (u’) 5 (4-6); tarsal empodium entire, 4 (4-5), 4-rayed, tarsal solenidion 6 (5-6), knobbed.

Opisthosoma ( Fig. 3A, D View FIG ) Dorsum with short median ridge, dorsal annuli 48, smooth; ventral annuli 58, with elongated microtubercles; setae c2 20 (20), on ventral annulus 7th; setae d 43 (42-45), 38 (38-39) apart, on ventral annulus 20th; setae e 14 (13-15), 18 (17-19) apart, on ventral annulus 34th; setae f 16 (15-17), 16 (15-17) apart, on 7th ventral annulus from rear; setae h1 absent, setae h2 45 (45).

Female genitalia ( Fig. 3B View FIG )

22 (22), 22 (22) wide, coverflap sculptured with granules, proximal setae on coxisternum III (3a) 5 (5), 17 (17) apart.

REMARKS

The new species is close to D. biaristatume Wang, Li & Wei, 2007 , but can be separated from the latter by the coxisternal plates and female coverflap sculptured with granules, ventral annuli with elongated microtubercles and tarsal empodium 4-rayed; in D. biaristatume , coxisternal plates and female coverflap smooth, ventral annuli with rounded microtubercles and tarsal empodium 3-rayed ( Wang et al. 2007).