Impatiophila bifasciata 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 : 57-58

22) Impatiophila bifasciata Fu & Gao , sp. nov.

( Fig. 32 ; Pl. 3E; Pl. 6T)

Diagnosis. Abdominal tergites III and IV each with broad, blackish brown to black, caudal band medially narrowly notched (Pl. 3E). Setae of middle row on 2nd costal section all heavy, peg-like setae, present beyond tip of R2+3. Hindleg tibia without black, apically blunt, stout spine at outer apex on underside. Tenth sternite medially concaved on dorsal margin, dorsally somewhat dilated ( Fig. 32 D). Oviscapt valve with 12 lateral ovisensilla on nearly straight (in ventral view) margin of apicolateral flap ( Fig. 32 H).

Description (♂, ♀). Head: Cibarium with 2‒3 medial and 5‒6 posterior sensilla per side.

Thorax (Pl. 3E): Postpronotum yellowish brown; scutum dark brown, pale along transverse suture, central line and lateral lines passing ipsilateral, dorsocentral setae; scutellum dark brown, laterally with yellowish, longitudinal stripes; pleura grayish brown to blackish brown.

Wing (Pl. 3E) yellowish hyaline; veins yellowish brown. C1 setae 2, subequal. Haltere pale yellow.

Legs (Pl. 3E) yellowish brown.

Abdomen (Pl. 3E): Tergites yellow, each with broad, brown, caudal band slightly broadened dorsally; band medially interrupted on II. Sternite grayish yellow; male VI somewhat quadrate, slightly longer than wide, nearly straight on posterior margin.

Male terminalia ( Fig. 32 A −F): Epandrium pubescent in patches posteriorly on dorsal 2/3, ventrally with ca. 17 long setae; caudoventral portion with 14 shorter setae. Surstylus with 1 long, stout seta in addition to 2 stout, upturned prensisetae around caudodorsal corner, 5 apically converging prensisetae along distal margin and 2 short setae near ventral apex. Cercus pubescent on anterior half, with ca. 27 long setae. Hypandrium slightly narrowing anteriorly, narrower than long. Gonopod apically acutely protruded, curved ventrad. Paramere slightly bent dorsad in lateral view, longer than twice of width, with 6 sensilla. Aedeagal basal process about 2/3 length of paramere.

Female terminalia ( Fig. 32 G, H; Pl. 6T): Oviscapt valve brown, gently curved on dorsosubapical margin and less expanded dorsomedially in lateral view, with 5 dorsal ovisensilla, 12 lateral ones on nearly straight (in ventral view) margin of apicolateral flap and 7−8 distally slightly increasing in size on convex, ventral margin. Spermathecal capsule brown; introvert depth of duct about 1/3 of capsule height.

Measurements: BL = 2.60 (5♂ paratypes: 2.40−2.67, 5♀ paratypes: 2.37−2.77) mm, ThL = 1.13 (1.11−1.19, 1.08−1.25) mm, WL = 2.60 (2.60−2.63, 2.50−2.77) mm, WW = 1.18 (1.10−1.17, 1.07−1.20) mm.

Indices: arb = 2/1 (5♂, 5♀ paratypes: 2/1), FW/HW = 0.40 (0.38−0.41), ch/o = 0.07 (0.06−0.07), prorb = 1.00 (0.99−1.03), rcorb = 0.63 (0.59−0.72), orbito = 1.13 (1.00−1.18), vb = 0.49 (0.38−0.44), dcl = 0.54 (0.51−0.57), dcp = 0.37 (0.35−0.39), sterno = 0.66 (0.60−0.69), m-sterno = 0.66 (0.65−0.71), sctl = 1.05 (0.98−1.13), sctlp = 1.03 (0.97−1.16), C = 2.57 (2.43−2.72), 4c = 0.84 (0.81−0.86), 4v = 1.63 (1.56−1.73), 5x = 1.49 (1.46−1.71), ac = 2.79 (2.84−3.42), M = 0.46 (0.43−0.48), C3F = 0.20 (0.16−0.29).

Holotype. ♂ (#02572), Mt. E’mei, Emeishan, Sichuan, China, 19.vii.1992, ex shelter, M.J. Toda ( KIZ).

Paratypes. CHINA: 5♂, 5♀ (#02573, #02893−901), same data as holotype ( KIZ); 5♂, 3♀, same data as holotype ( SEHU); 3♂, 2♀, Shennongjia, Hubei, 1520 m alt., 26.vii.1992, M.J. Toda ( SEHU).

Distribution. China (Hubei, Sichuan).

Etymology. Referring to the two (bi-) dark, longitudinal stripes (fasciatus) on the scutum.

Figures

FIGURE 32. Impatiophila bifasciata Fu & Gao, sp. nov. Adult male (holotype, # 02572) and female (paratype, # 02573): 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).