Impatiophila acutivalva 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 : 73

35) Impatiophila acutivalva Fu & Gao , sp. nov.

( Fig. 41 ; Pl. 4F; Pl. 7H)

Diagnosis. Abdominal tergite IV with caudal, black band medially neither interrupted/constricted nor protruded (Pl. 4F). Scutum and scutellum unicolorously glossy black, without distinct color pattern (Pl. 4F). Hindleg tarsomere I with 1 black, apically blunt, stout spine at outer apex on underside. Tenth sternite as wide as long, dorsally not dilated, with narrow, U-shaped notch medially on convex, dorsal margin ( Fig. 41 D). Oviscapt valve with 2 dorsal ovisensilla ( Fig. 40 G).

Description (♂, ♀). Head: Cibarium with 2−3 medial sensilla and 2−4 posterior sensilla per side. Labellum with 5−6 pseudotracheae per side.

Thorax (Pl. 4F): Postpronotum blackish brown; scutum and scutellum glossy black; pleura blackish brown to black.

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

Legs (Pl. 4F) yellow.

Abdomen (Pl. 4F): Tergites II −VI with broad, black, caudal bands; bands on II and III medially narrowly interrupted. Sternites grayish yellow.

Male terminalia ( Fig. 41 A −F): Epandrium very sparsely pubescent in patches, with ca. 11 long setae on ventral 3/5 and ca. 15 shorter setae on caudoventral portion. Surstylus with 2 long setae in addition to 2 stout, upturned prensisetae at and above caudodorsal corner, 7 prensisetae along distal margin and 1 seta at ventral apex. Cercus very sparsely pubescent in patches, with ca. 25 long setae. Aedeagal basal process about 1/2 the length of paramere. Hypandrium somewhat rectangular, posteriorly less convex in lateral view. Gonopod apically slightly curved ventrad and pointed in lateral view. Paramere with 6 sensilla.

Female terminalia ( Fig. 41 G, H; Pl. 7H): Oviscapt valve yellowish brown, gently curved on dorsosubapical margin and apically sharp in lateral view, with 4 lateral and ca. 15 ventral ovisensilla arranged entirely at nearly equal intervals. Spermathecal capsule brown: introvert depth of duct about 4/5 of capsule height.

Measurements: BL = 2.67 (5♂ paratypes: 2.40−2.67, 5♀ paratypes: 2.40−2.83) mm, ThL = 1.12 (1.08−1.12, 1.09−1.27) mm, WL = 2.40 (2.30−2.40, 2.40−2.66) mm, WW = 1.00 (1.00−1.03, 1.00−1.13) mm.

Indices: arb = 2/1 (5♂, 5♀ paratypes: 2−3/1), FW/HW = 0.47 (0.41−0.48), ch/o = 0.08 (0.07−0.12), prorb = 1.06 (0.94−1.24), rcorb = 0.50 (0.53−0.68), orbito = 1.14 (0.86−1.26), vb = 0.38 (0.34−0.47), dcl = 0.44 (0.44−0.58), dcp = 0.42 (0.38−0.46), sterno = 0.69 (0.54−0.70), m-sterno = 0.72 (0.61−0.82), sctl = 1.05 (0.98−1.09), sctlp = 1.09 (0.90−1.21), C = 2.97 (2.67−3.16), 4c = 0.75 (0.74−0.82), 4v = 1.59 (1.56−1.86), 5x = 1.45 (1.38−1.70), ac = 2.23 (2.20−2.64), M = 0.40 (0.40−0.48), C3F = 0.25 (0.20−0.36).

Holotype. ♂ (#00282), Tongmai, Yigong, Bomi, Linzhi, Xizang, China, 30°06′10′′N, 95°04′49′′E, 2080 m, 9.x.2010, ex Impatiens ? arguta Hook. f. et. Thoms. ( Fig. 1 D) J.J. Gao ( KIZ).

Paratypes. CHINA: 5♂, 5♀ (#00283, #00298, #00299, #00374, #00375, #00497, #00498, #00517, #00549, #00550), same data as holotype ( KIZ, SEHU).

Distribution. China (Xizang).

Etymology. Referring to the apically acute (acutus) oviscapt valve (valva).

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 40. Impatiophila furcatosternata Fu & Gao, sp. nov. Adult male (holotype, # 00272) and female (paratype, # 00275): 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).

FIGURE 41. Impatiophila acutivalva Fu & Gao, sp. nov. Adult male (holotype, # 00282) and female (paratype, # 00283): 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).