Disella eyrei, Wang & Wei & Yang, 2013

Wang, Guo-Quan, Wei, Sui-Gai & Yang, Ding, 2013, Three new species of Nothopodinae (Acari, Eriophyidae) from China, Zoosystema 35 (1), pp. 25-33 : 28-31

Disella eyrei n. sp.

( Fig. 2 )

TYPE MATERIAL. — Holotype: Fengyangshan National Nature Reserve, Longquan City (27°53’N, 119°11’E), Zhejiang Province, China, 28.VII.2007, from Castanopsis eyrei (Champ.) Tutch. (Fagaceae) , Guo-Quan Wang, slide-mounted, ♀ ( DPPGXU).

Paratypes: mounted on 8 slides, with the same data as holotype, 2 ♀♀, 3 ♂♂ ( DPPGXU) ; 2 ♀♀, 1 ♂ (MNHN-Ac1181, Ac1182, Ac1183).

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 specific name of the type host plant.

DIAGNOSIS. — Body fusiform, brown; prodorsal shield with median, admedian lines and submedian lines complete connected with three transverse lines forming four rows of cells; coxal plate I with short lines; tarsal empodium 4-rayed, tarsal solenidion knobbed; dorsal annuli smooth, ventral annuli with elongated microtubercles; setae h1 absent; female coverflap with basal irregular short lines.

FEMALE DESCRIPTION (n = 5)

Body ( Fig. 2A )

Fusiform, brown, 172 (162-178), 72 (70-76) wide, 35 (31-38) thick.

Gnathosoma

24 (22-25), obliquely downward; dorsal pedipalp genual setae (d) 5 (5-6), pedipalp coxal setae (ep) 4 (4-5); cheliceral stylets 19 (18-21).

Prodorsal shield ( Fig. 2A )

40 (38-43), 58 (55-60) wide, frontal lobe present; median, admedian and submedian lines complete, connected with three transverse lines at ¼, ½, ¾ from anterior, 1st and 2nd anterior transverse lines connect shield margin, 3rd transverse line short, connect admedian lines; median, admedian and transverse lines forming four rows of cells, 8, 6, 2, 2 from anterior, respectively. Scapular tubercles placed ahead of rear margin, 32 (31- 33) apart, scapular setae (sc) directed upward, 12 (10-13).

Coxae ( Fig. 2B )

Internal sternal apodeme present, coxisternal plate I sculptured with short lines, coxisternal plate II smooth; anterolateral setae on coxisternum I (1b) absent; proximal setae on coxisternum I (1a) 6 (5-7), 12 (12-13) apart; proximal setae on coxisternum II (2a) 20 (18-24), 28 (26-29) apart. Coxal-genital annuli 4.

Legs ( Fig. 2E, F )

Tibiae fused with tarsi. Legs I 27 (26-28), trochanter 2 (2-3), femur 11 (10-11), basiventral femoral setae (bv) 7 (7-8); genu 4 (4-5), antaxial genual setae (l’’) 25 (22-29); tarsus 10 (10-11), paraxial fastigial tarsal setae (ft’) 17 (15-18), antaxial fastigial tarsal setae (ft’’) 20 (18-22), paraxial unguinal tarsal setae (u’) 4 (3-4); tarsal empodium ( Fig. 2c ) entire, 4 (4-5), 4-rayed, tarsal solenidion 5 (5-6), knobbed. Legs II 23 (22-25), trochanter 2 (2-3), femur 9 (9-10), basiventral femoral setae (bv) 10 (10-11); genu 3 (3-4), antaxial genual setae (l’’) 12 (10-13); tarsus 9 (8-9), paraxial fastigial tarsal setae (ft’) 22 (21-23), antaxial fastigial tarsal setae (ft’’) 5 (5-6), paraxial unguinal tarsal setae (u’) 4 (3-4); tarsal empodium entire, 4 (3-4), 4-rayed, tarsal solenidion 8 (7-8), knobbed.

Opisthosoma ( Fig. 2A, D )

Dorsum with short median ridge, dorsal annuli 54 (54-55), smooth; ventral annuli 58, with elongated microtubercles; setae c2 23 (21-25), on ventral annulus 10th; setae d 40 (36-43), 41 (39-43) apart, on ventral annulus 18th; setae e 6 (6-7), 21 (20-23) apart, on ventral annulus 28th; setae f 20 (20-21), 22 (22-23) apart, on 8th ventral annulus from rear; setae h1 absent, setae h2 60 (52-65).

Female genitalia ( Fig. 2B )

18 (15-22), 30 (28-33) wide, coverflap sculptured with basal irregular short lines, proximal setae on coxisternum III (3a) 8 (7-8), 22 (21-23) apart.

MALE DESCRIPTION (n = 4)

Body

Fusiform, brown, 100-150, 50-65 wide. Prodorsal shield

33, 47 (45-50) wide, frontal lobe present; median, admedian and submedian lines complete, connected with three transverse lines at ¼, ½, ¾ from anterior, 1st and 2nd anterior transverse lines connect shield margin, 3rd transverse line short, connect admedian lines; median, admedian and transverse lines forming four rows of cells, 8, 6, 2, 2 from anterior, respectively. Scapular tubercles placed ahead rear margin, 29 (28-30) apart, scapular setae (sc) directed upward, 10.

Coxae Internal sternal apodeme present, coxisternal plates sculptured with short lines; anterolateral setae on coxisternum I (1b) absent; proximal setae on coxisternum I (1a) 5 (5-6), 9 (9-10) apart; proximal setae on coxisternum II (2a) 18 (17-20), 25 (24-27) apart. Coxal-genital annuli 4.

Legs

Tibiae fused with tarsi. Legs I 24 (22-26), trochanter 2 (2-3), femur 9 (9-10), basiventral femoral setae (bv) 7 (6-8); genu 3 (3-4), antaxial genual setae (l’’) 25 (23-27); tarsus 8 (8-9), paraxial fastigial tarsal setae (ft’) 14 (13-16), antaxial fastigial tarsal setae (ft’’) 19 (18-21), paraxial unguinal tarsal setae (u’) (3-4); tarsal empodium entire, 4 (4-5), 4-rayed, tarsal solenidion 4 (4-5), knobbed. Legs II 21 (19-23), trochanter 2 (2-3), femur 8 (8-9), basiventral femoral setae (bv) 11 (10-12); genu 3 (3-4), antaxial genual setae (l’’) 10 (8-12); tarsus 6 (6-7), paraxial fastigial tarsal setae (ft’) 17 (15-20), antaxial fastigial tarsal setae (ft’’) 5 (5-6), paraxial unguinal tarsal setae (u’) 3 (3-4); tarsal empodium entire, 3 (3-4), 4-rayed, tarsal solenidion 6 (6-7), knobbed.

Opisthosoma

Dorsum with short median ridge, dorsal annuli 52, smooth; ventral annuli 57, with elongated microtubercles; setae c2 21 (21-22), on ventral annulus 10th; setae d 35 (33-38), 38 (37-39) apart, on ventral annulus 18th; setae e 6, 18 apart, on ventral annulus 28th; setae f 17, 19 apart, on 8th ventral annulus from rear; setae h1 absent, setae h2 50 (45-56).

Male genitalia ( Fig. 2G )

17 (16-19) wide, proximal setae on coxisternum III (3a) 7 (7-8), 11 (11-12) apart.

REMARKS

The new species is close to D. cylindrokeluphae Wei, Xie & Chen, 2006 , but can be separated from the latter by the submedian lines complete, setae h1 absent and infesting Castanopsis eyrei (Fagaceae) ; in D. cylindrokeluphae , submedian lines incomplete, setae h1 present and infesting Cylindrokelupha robinsonii (Gagnep.) Kosterm (Leguminosae) ( Wei et al. 2006). The species is differentiated from Disella itea n. sp. as follows: anterior prodorsal shield with first eight cells and second six cells, submedian lines complete and basal female coverflap with short irregular lines; in D. itea n. sp., anterior prodorsal shield with first and second two cells, submedian lines absent and female coverflap with granules.

Figures

FIG. 2.— Disella eyrei n. sp.: A, dorsal aspect of female;B, coxigenital area of female;C, empodium (enlarged);D, lateral view of annuli (enlarged); E, leg І; F, leg ІІ; G, male genitalia. Scale bar: A, B, D, G, 44 μm; C, 10 μm; E, F, 26 μm.