Impatiophila parvula 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 : 29-30

3) Impatiophila parvula Fu & Gao , sp. nov.

( Fig. 13 ; Pl. 1B; Pl. 6B)

Diagnosis. Abdominal tergites III −V unicolorously black (Pl. 1B). Paramere somewhat pointed apically in lateral view ( Fig. 13 F). Tenth sternite somewhat triangularly convex on dorsal margin, broadened ventrally ( Fig. 13 D). Oviscapt valve with 6−7 ovisensilla on dorsal margin ( Fig. 13 G).

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

Thorax (Pl. 1B): Postpronotum, scutum and scutellum black; pleura blackish brown.

Wing (Pl. 1B) pale brown; veins dark brown. C1 setae subequal. Setae of middle row on 2nd costal section all weak, trichoid. Haltere brown.

Legs (Pl. 1B) yellowish brown. Hindleg tibia without black, apically blunt, stout spine at outer apex on underside.

Abdomen: Sternites grayish yellow; male VI somewhat quadrate, slightly longer than wide, nearly straight or slightly concave on posterior margin.

Male terminalia ( Fig. 13 A–F): Epandrium pubescent largely more than half, except for mid-dorsal, anterior and ventral portions, ventrally with 9 long setae; caudoventral portion broad, with a patch of ca. 19 short, stout setulae. Surstylus with 1 long seta in addition to stout, upturned prensiseta at caudodorsal corner, 5 apically converging prensisetae along distal margin and long seta near ventral apex. Cercus sparsely pubescent, with ca. 23 long setae. Hypandrium nearly parallel-sided on medial to posterior portion of lateral margins, with broad apodeme anteriorly. Gonopod apically narrowing in lateral view, connected to aedeagal basal process by narrow, membraneous tissue. Paramere longer than twice of width in lateral view, with 6 sensilla. Aedeagal basal process slightly longer than 1/2 of paramere.

Female terminalia ( Fig. 13 G, H; Pl. 6B): Oviscapt valve gently curved on dorsosubapical margin and less expanded dorsomedially in lateral view, with 17−19 lateral ovisensilla and ca. 13 distally increasing in size on nearly straight, ventral margin. Spermathecal capsule brown; introvert depth of duct about 1/2 of capsule height.

Measurements: BL = 1.87 in the holotype (5♂ paratypes: 1.87−2.08; 5♀ paratypes: 1.81−2.05) mm, ThL = 0.85 (0.72−0.88; 0.72−0.93) mm, WL = 1.80 (1.55−1.80; 1.59−1.90) mm, WW = 0.77 (0.69−0.77; 0.67−0.81) mm.

Indices: arb = 2/1 (5♂, 5♀: 2−3/0−2), FW/HW = 0.47 (0.45−0.50), ch/o = 0.11 (0.07−0.15), prorb = 1.00 (0.88−1.26), rcorb = 0.73 (0.53−0.84), orbito = 1.17 (0.91−1.31), vb = 0.39 (0.31−0.46), dcl = 0.55 (0.45−0.62), dcp = 0.36 (0.35−0.45), sterno = 0.65 (0.51−0.75), m-sterno = 0.66 (0.64−0.79), sctl = 0.92 (0.90−1.11), sctlp = 1.00 (0.85−1.14), C = 2.37 (2.22−2.53), 4c = 0.90 (0.82−0.98), 4v = 1.61 (1.48−1.79), 5x = 1.71 (1.63−1.92), ac = 2.72 (2.17−2.60), M = 0.43 (0.44−0.53).

Holotype. ♂ (#00609), along the way from the Hanmi Village to the seat of Beibeng Town, Motuo County, Linzhi, Xizang (Tibet), China, 27.ix.2010, ex Impatiens siculifer Hook. f. ( Fig. 1 A), J.J. Gao ( KIZ).

Paratypes. CHINA: 5♂, 5♀ (#00270, #00271, #00603, #00605−7, #00610−12, #00614), same data as holotype; 2♂, 1♀ (#00300, #00304, #01401), by net sweeping, along the way from Beibeng to the seat of Motuo County, Linzhi, Xizang, 1.x.2010, J.J. Gao ( KIZ, SEHU).

Distribution. China (Xizang).

Etymology. Referring to the small (parvus) body size.

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 13. Impatiophila parvula Fu & Gao, sp. nov. Adult male (paratype, # 00270) and female (paratype, # 00612): 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). Abbreviations: aed = aedeagus, aed a = aedeagal apodeme, aed b p = aedeagal basal process, cerc = cercus, epand = epandrium, epand a = epandrial apodeme, gon = gonopod, hypd = hypandrium, pm = paramere, sur = surstylus. Scale lines = 0.1 (solid lines) or 0.05 mm (dashed lines).