Impatiophila quadrangulata 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 : 58-60

23) Impatiophila quadrangulata Fu & Gao , sp. nov.

( Fig. 33 ; Pl. 3F; Pl. 7A)

Diagnosis. Abdominal tergites III and IV each with broad, blackish brown, caudal band medially somewhat protruded; V with caudal band medially neither interrupted/constricted nor protruded (Pl. 3E). Setae of middle row on 2nd costal section all heavy, peg-like setae, present beyond tip of R2+3. Paramere somewhat quadrangular in lateral view, with apically diverging process ventrosubbasally (at continuum between paramere and hypandrium) and 7 sensilla arranged in chevroned row on lateral surface ( Fig. 33 F).

Description (♂, ♀). Head: Cibarium with 3‒4 medial and 6‒7 posterior sensilla per side.

Thorax (Pl. 3F): Postpronotum yellow; scutum blackish brown, with 3 pale, longitudinal stripes and pale posterior margin; scutellum blackish brown, pale anteriorly and laterally; pleura brown to blackish brown.

Wing (Pl. 3F) hyaline, yellowish; veins pale brown. C1 setae 2, ventral one shorter and thinner. Haltere whitish yellow.

Legs (Pl. 3F) yellowish brown. Hindleg tibia without black, apically blunt, stout spine at outer apex on underside.

Abdomen (Pl. 3F): Tergites yellowish brown; II −VI each with broad, blackish brown, caudal band, notched medially on II. Sternites grayish yellow; male VI somewhat quadrate, much wider than long, nearly straight on posterior margin.

Male terminalia ( Fig. 33 A −F): Epandrium pubescent in small patches on posteromedial portion only, obliquely truncate on ventral margin, ventrally with ca. 12 long setae; caudoventral process somewhat triangular, with ca. 40 short spine-like setulae. Surstylus moderately concave in ventral 2/3 of distal margin, with 1 long, thick seta in addition to 2 stout, upturned prensiseta around caudodorsal corner, 5 apically converging prensisetae along distal margin and 1 short seta near ventral apex. Tenth sternite somewhat triangularly expanded on dorsolateral margins, convex on dorsal margin. Cercus pubescent on anteromedial portion, with ca. 28 long setae. Hypandrium slightly narrowing anteriorly, narrower than 1/2 length. Gonopod apically right-angled in lateral view. Paramere only slightly longer than wide. Aedeagal basal process about 3/4 length of paramere.

Female terminalia ( Fig. 33 G, H; Pl. 7A): Oviscapt valve brown, gently curved on dorsosubapical margin and less expanded dorsomedially in lateral view, with 3 dorsal ovisensilla, 19−21 lateral ones on nearly straight (in ventral view) margin of apicolateral flap and 10 distally increasing in size on slightly convex, ventral margin. Spermathecal capsule brown; introvert depth of duct about 1/4 of capsule height.

Measurements: BL = 2.23 (2♂ paratypes: 2.20−2.47, 2♀ paratypes: 2.63−2.70) mm, ThL = 1.13 (1.10−1.17, 1.13−1.16) mm, WL = 2.48 (2.60−2.60, 2.63−2.83) mm, WW = 1.14 (1.17−1.20, 1.14−1.23) mm.

Indices: arb = 3/1 (2♂, 2♀ paratypes: 2−3/1), FW/HW = 0.44 (0.41−0.44), ch/o = 0.11 (0.08−0.10), prorb = 0.91 (0.91−1.07), rcorb = 0.48 (0.65−0.78), orbito = 0.95 (1.07−1.35), vb = 0.35 (1♂, 2♀ paratypes: 0.39−0.47), dcl = 0.61 (0.55−0.60), dcp = 0.40 (0.32−0.37), sterno = 0.71 (0.69−0.80), m-sterno = 0.75 (0.75−0.83), sctl = 1.06 (0.99−1.05), sctlp = 1.13 (1.00−1.28), C = 2.19 (2.37−2.50), 4c = 0.98 (0.87−0.94), 4v = 1.85 (1.62−1.68), 5x = 1.81 (1.50−1.73), ac = 3.16 (2.87−3.12), M = 0.55 (0.44−0.50), C3F = 0.06 (0.06−0.09).

Holotype. ♂ (#02574), Mt. E’mei, Sichuan, China, ca. 2540 m, 17.vii.1992, by net sweeping, M.J. Toda ( KIZ).

Paratypes: CHINA: 1♂, 2♀ ( KIZ: #02575, #02883, #02884), 1♂ ( SEHU), same data as holotype; 1♂ ( KIZ: #02885) Mt. E’mei, Sichuan, 19.vii.1992, by net sweeping, M.J. Toda.

Distribution. China (Sichuan).

Etymology. Referring to the quadrangular (quadrangulatus) paramere.

Figures

FIGURE 33. Impatiophila quadrangulata Fu & Gao, sp. nov. Adult male (holotype, # 02574) and female (paratype, # 02575): 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).