Impatiophila rhombivalva 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 : 43-45

13) Impatiophila rhombivalva Fu & Gao , sp. nov.

( Fig. 23 ; Pl. 2D; Pl. 6L)

Diagnosis. Setae of middle row on 2nd costal section mostly heavy, peg-like setae, but not reaching R2+3. Hindleg tibia with 1 black, apically blunt, stout spine at outer apex on underside. Tenth sternite somewhat trapezoid, slightly constrict subbasally, slightly concave on dorsal margin ( Fig. 23 D). Oviscapt anteriorly narrowing and round on margin in ventral view ( Fig. 23 H).

Description (♂, ♀). Head: Cibarium with 2 medial and 6‒7 posterior sensilla per side. Thorax (Pl. 2D): Postpronotum yellowish brown; scutum and scutellum glossy black, blackish brown laterally; pleura blackish brown to black.

Wing (Pl. 2D) pale brown; veins brown. C1 setae 2, ventral one shorter and thinner. Haltere pale yellow. Abdomen (Pl. 2D): Tergite I dark brown; II blackish brown; III–VI with faded, blackish brown, laterally extended caudal bands; bands medially protruded on III and IV, but medially more or less constricted on V and VI. Sternites pale grayish brown; male VI somewhat quadrate, slightly longer than wide, nearly straight or slightly concave on posterior margin.

Male terminalia ( Fig. 23 A–F): Epandrium pubescent on posterior portion of dorsal 1/2, ventrally with ca. 9 long setae; caudoventral portion apically more or less triangular, with ca. 14 short setae. Surstylus with 1 long seta in addition to 1 stout, upturned prensiseta above caudodorsal corner, 5 apically converging prensisetae along distal margin and 1 short seta near ventral apex. Cercus pubescent near anterior margin, with ca. 26 long setae. Hypandrium somewhat rectangular in ventral view. Gonopod somewhat triangular, slightly curved ventrad apically in lateral view. Paramere auricular, with slightly waved dorsal margin in lateral view, longer than twice of width, with 6 sensilla. Aedeagal basal process slightly longer than 1/2 length of paramere.

Female terminalia ( Fig. 23 G, H; Pl. 6L): Oviscapt valve with 4−5 dorsal ovisensilla, 12−13 lateral ones on margin of relatively narrow, apicolateral flap and 6–8 distally increasing in size on distally concave, ventral margin. Spermathecal capsule brown; introvert depth of duct about 1/2 of capsule height.

Measurements: BL = 1.93 (2♀ paratypes: 1.83−2.38) mm, ThL = 0.95 (0.82−1.11) mm, WL = 2.02 (1.83−2.38) mm, WW = 0.90 (0.75−1.04) mm.

Indices: arb = 2/1 (2♀ paratypes: 2/1), FW/HW = 0.42 (0.41−0.46), ch/o = 0.07 (0.12−0.12), prorb = 1.14 (0.97−1.00), rcorb = 0.68 (0.60−0.63), orbito = 0.84 (0.83−1.00), vb = 0.44 (0.46−0.48), dcl = 0.64 (0.54−0.62), dcp = 0.40 (0.32−0.39), sterno = 0.78 (0.62−0.77), m-sterno = 0.85 (0.72−0.75), sctl = 0.95 (1.06−1.09), sctlp = 1.17 (0.92−1.24), C = 2.38 (2.26−2.38), 4c = 0.76 (0.82−0.88), 4v = 1.34 (1.44−1.60), 5x = 1.50 (1.65−1.79), ac = 2.63 (2.58−2.90), M = 0.35 (0.42−0.44).

Holotype. ♂ (#02579), Huanglianshan Nature Reserve, Luchun County, Honghe District, Yunnan, China, 26.iv.2010, by net sweeping, Y.R. Su et al. ( KIZ).

Paratypes. CHINA: 2♀ (#01198, #02581), same data as holotype ( KIZ).

Distribution. China (Yunnan).

Etymology. Referring to the rhombic (rhombus) oviscapt valve (valva) in ventral view.

Figures

FIGURE 23. Impatiophila rhombivalva Fu & Gao, sp. nov. Adult male (holotype, # 02579) and female (paratype, # 02581): 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).