Impatiophila aspidosternata 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 : 45-46

14) Impatiophila aspidosternata Fu & Gao , sp. nov.

( Fig. 24 ; Pl. 2E; Pl. 6M)

Diagnosis. Heavy, peg-like setae of middle row on 2nd costal section interspersed with weak, trichoid ones. Hindleg tibia without black, apically blunt, stout spine at outer apex on underside. Tenth sternite ventrally tapering, slightly concave on dorsal margin ( Fig. 24 D). Hypandrium twice as long as wide ( Fig. 24 E). Paramere somewhat angled at postero-dorsal and –ventral corners in lateral view, shorter than twice of width, with 5 sensilla ( Fig. 24 E, F). Oviscapt valve less expended submedially in ventral view ( Fig. 24 H).

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

Thorax (Pl. 2E): Postpronotum brown; scutum and scutellum glossy black; pleura grayish brown to blackish black.

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

Abdomen (Pl. 2E): Tergites brown. Sternites grayish brown; male VI somewhat quadrate, slightly wider than long, nearly straight on posterior margin.

Male terminalia ( Fig. 24 A −F): Epandrium very sparsely pubescent on dorsal 1/3, ventrally with ca. 12 long setae; caudoventral portion rounded apically, with ca. 19 short setulae. Surstylus with 2 setae in addition to 1 stout, upturned prensiseta above caudodorsal corner, 6 apically converging prensisetae along distal margin and 3 short setae near ventral apex. Cercus pubescent on anterior portion, with ca. 23 long setae. Hypandrium somewhat narrowing anteriorly in ventral view, with distinct apodeme on anterior margin. Gonopod somewhat triangular in lateral view. Aedeagal basal process longer than 1/2 length of paramere.

Female terminalia ( Fig. 24 G, H; Pl. 6M): Oviscapt valve gently curved on dorsosubapical margin and less expanded dorsomedially in lateral view, with 4 dorsal ovisensilla, 13−14 lateral ones on margin of relatively narrow, apicolateral flap and 11 distally slightly increasing in size on distally slightly concave, ventral margin. Spermathecal capsule brown; introvert depth of duct about 2/3 of capsule height.

Measurements: BL = 2.23 (5♂ paratypes: 2.00−2.47, 5♀ paratypes: 2.03−2.47) mm, ThL = 0.97 (0.87−1.00, 0.97−1.03) mm, WL = 2.10 (1.93−2.10, 2.03−2.20) mm, WW = 0.93 (0.87−0.93, 0.87−0.97) mm.

Indices: arb = 2/1 (5♂, 5♀ paratypes: 2−3/0−1), FW/HW = 0.39 (0.38−0.45), ch/o = 0.13 (0.07−0.11), prorb = 1.06 (0.97−1.19), rcorb = 0.76 (0.64−0.79), orbito = 1.40 (1.14−1.40), vb = 0.50 (0.36−0.46), dcl = 0.57 (0.52−0.60), dcp = 0.33 (0.29−0.41), sterno = 0.62 (0.58−0.83), m-sterno = 0.77 (0.65−0.81), sctl = 0.98 (0.93−1.05), sctlp = 0.93 (0.93−1.33), C = 2.57 (2.16−2.74), 4c = 0.84 (0.79−1.00), 4v = 1.60 (1.54−1.79), 5x = 1.79 (1.53−1.88), ac = 2.50 (2.38−3.24), M = 0.49 (0.40−0.52).

Holotype. ♂ (#00193), Maoershan National Nature Reserve, Xing’an, Guilin, Guangxi, China, 17−19.iii.2009, ex flowers of Gesneriaceae sp.1 ( Fig. 1 G), J.J. Gao ( KIZ).

Paratypes. CHINA: 5♂, 5♀ (#00185−7, #00189, #00192, #00194, #00195, #00197, #00198, #00201), same data as holotype ( KIZ); 1♂, 2♀, Yangjiangping, Tianpingshan, Hunan, 1−6.ix.2000, Y.G. Hu ( SEHU).

Distribution. China (Hunan, Guangxi).

Etymology. Referring to the scutellate (aspido-) tenth sternite (sternum).

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 24. Impatiophila aspidosternata Fu & Gao, sp. nov. Adult male (holotype, # 00193) and female (paratype, # 00185): 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).