Impatiophila truncivalva Fu & Gao

Fu, Zhao, Toda, Masanori J., Li, Nan-Nan, Zhang, Ya-Ping & Gao, Jian-Jun, 2016, A new genus of anthophilous drosophilids, Impatiophila (Diptera, Drosophilidae): morphology, DNA barcoding and molecular phylogeny, with descriptions of thirty-nine new species, Zootaxa 4120 (1), pp. 1-100 : 76-77

37) Impatiophila truncivalva Fu & Gao , sp. nov.

( Fig. 43 ; Pl. 4H; Pl. 7J)

Diagnosis. Abdominal tergites unicolorously glossy black (Pl. 4H). Labellum with 6 pseudotracheae per side. Tenth sternite longer than wide, dorsally dilated, concave on lateral margins ( Fig. 43 D). Oviscapt valve with 4 dorsal ovisensilla ( Fig. 43 G).

Description (♂, ♀). Head: Cibarium with 2−3 medial and 3 posterior sensilla per side.

Thorax (Pl. 4H): Postpronotum blackish brown to black; pleura blackish brown to black.

Wing (Pl. 4H) pale brown; veins brown. C1 setae 2, subequal. Haltere pale yellow.

Legs (Pl. 4H) yellowish brown. Hindleg tarsomere I with 2 black, apically blunt, stout spines at outer apex on underside.

Abdomen: Sternites grayish brown.

Male terminalia ( Fig. 43 A −F): Epandrium densely pubescent except for anterior and ventral 1/3 portions, with ca 15 long setae on ventral half and ca. 16 shorter setae on caudoventral portion. Surstylus with 1 seta in addition to 1 stout, upturned prensiseta above caudodorsal corner, 7 prensisetae along distal margin and 1 seta at ventral apex. Tenth sternite with W-shaped notch medially on dorsal margin. Cercus sparsely pubescent on anterior portion, with ca. 26 long setae. Hypandrium somewhat trapeziform, posteriorly broader. Gonopod apically more or less obtuse in lateral view. Paramere smooth on dorsal and ventral margins, with 5 sensilla. Aedeagal basal process slightly shorter than 1/2 length of paramere.

Female terminalia ( Fig. 43 G, H; Pl. 7J): Oviscapt valve brown, obliquely truncate on dorsosubapical margin in lateral view, with 13 ventral ovisensilla arranged entirely at nearly equal intervals. Spermathecal capsule brown; introvert depth of duct about 4/5 of capsule height.

Measurements: BL = 2.30 (2♂ paratypes: 2.03−2.27, 4♀ paratypes: 2.17−2.30) mm, ThL = 0.92 (0.92−0.98, 0.90−1.02) mm, WL = 2.07 (2.00−2.15, 2.03−2.13) mm, WW = 0.92 (0.87−0.94, 0.87−0.90) mm.

Indices: arb = 2−3/1 (2♂, 4♀ paratypes: 2−3/1), FW/HW = 0.44 (0.39−0.45), ch/o = 0.09 (0.10−0.14), prorb = 1.06 (1.03−1.30), rcorb = 0.65 (0.50−0.65), orbito = 1.18 (0.69−0.92), vb = 0.33 (0.34−0.43), dcl = 0.51 (0.49−0.62), dcp = 0.43 (0.36−0.48), sterno = 0.66 (0.60−0.73), m-sterno = 0.72 (0.63−0.84), sctl = 0.95 (0.87−0.98), sctlp = 1.11 (1.00−1.26), C = 2.92 (2.45−2.72), 4c = 0.71 (0.78−0.93), 4v = 1.50 (1.54−1.80), 5x = 1.43 (1.47−1.63), ac = 2.09 (2.25−2.44), M = 0.40 (0.39−0.48), C3F = 0.00 (0.00−0.18).

Holotype. ♂ (#00302), along the way from the seat of Beibeng Town, Motuo County to the Yarang Village, Motuo Town, Motuo County, Linzhi, Xizang, China, 1.x.2010, ex Impatiens siculifer Hook. f. ( Fig. 1 H), J.J. Gao ( KIZ).

Paratypes. CHINA: 2♂, 2♀ (#00303, #01536, #00500, #00503), same data as holotype; 1♂ (#00369), along the way from the Hanmi Village, Beibeng Town to the seat of the Beibeng Town, Motuo County, Linzhi, Xizang, 27.ix.2010, ex Impatiens siculifer Hook. f. ( Fig. 1 A), J.J. Gao; 1♀ (#00396), Baihualing, Mangkuan, Longyang, Baoshan, Yunnan, 13.vi.2011, ex Impatiens sp. (with yellow flowers), J.J. Gao; 1♀ (#00511), along the way from the Yarang Village to the seat of the seat of Motuo County, Linzhi, Xizang, 1.x.2010, ex Impatiens siculifer Hook. f. ( Fig. 1 H), J.J. Gao ( KIZ).

Distribution. China (Xizang, Yunnan).

Etymology. Referring to the oviscapt valve (valva) apically obliquely truncate (truncus).

Figures

FIGURE 1. Flowers from which some of the BVD (Impatiophila gen. nov.) flies employed in the present study were collected. Sites of photographing are given in parentheses (see Fig. 2 for detailed information about each site). A, Impatiens siculifer Hook. f. (site 3); B, Impatiens sp. aff. bahanensis Hand. - Mazz (site 2); C, Impatient desmantha Hook. f. (site 1), D, Impatiens arguta Hook. f. et. Thoms. (site 4); E, Impatiens radiata Hook. f. (site 10); F, Impatiens racemosa (site 17); G, Gesneriaceae sp. 1 (site 22); H, Impatiens siculifer Hook. f. (site 6); I, Impatiens uniflora Hayata (site 23); J, Gesneriaceae sp. 2 (site 6).

FIGURE 43. Impatiophila truncivalva Fu & Gao, sp. nov. Adult male (holotype, # 00302) and female (paratype, # 00303): A, periphallic organs (caudolateral view); B, caudoventral part of epandrium; C, surstylus (caudal view); D, tenth sternite; E, phallic organs (dorsal view); F, phallic organs (lateral view); G, oviscapt (lateral view); H, oviscapt (ventral view).