Impatiophila furcatosternata 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 : 71-73

34) Impatiophila furcatosternata Fu & Gao , sp. nov.

( Fig. 40 ; Pl. 4E; Pl. 7G)

Diagnosis. Abdominal tergite IV with caudal, black band medially neither interrupted/constricted nor protruded (Pl. 4E). Scutum and scutellum unicolorously glossy black, without distinct color pattern (Pl. 4E). Hindleg tarsomere I with 2 black, apically blunt, stout spines at outer apex on underside. Tenth sternite slightly broader than long, dorsally dilated, with deep, narrow, V-shaped notch medially on dorsal margin ( Fig. 40 D). Oviscapt valve with 4‒5 dorsal ovisensilla ( Fig. 40 H).

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

Thorax (Pl. 4E): Postpronotum blackish brown; thoracic pleura blackish brown.

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

Legs (Pl. 4E) yellow.

Abdomen (Pl. 4E): Tergites yellowish brown, with broad, black, laterally broadened, caudal bands on II −V; bands on II and III medially narrowly interrupted; VI entirely blackish brown. Sternites grayish yellow.

Male terminalia ( Fig. 40 A −F): Epandrium sparsely pubescent on posterior portion of dorsal half, with ca 10 long setae on ventral half and ca. 15 shorter setae on caudoventral portion. Surstylus with 2 long setae in addition to 2 more or less stout, upturned prensisetae at and above caudodorsal corner, 6 prensisetae along distal margin and 1 seta at ventral apex. Cercus slightly pubescent on anterior portion, with ca. 23 long setae. Hypandrium nearly parallel-sided, roundish on anterior margin, posteriorly convex in lateral view. Gonopod broad, apically somewhat triangular and curved ventrad in lateral view. Paramere apically somewhat truncate, with 7 sensilla. Aedeagal basal process about 1/2 length of paramere.

Female terminalia ( Fig. 40 G, H; Pl. 7G): Oviscapt valve yellowish brown, gently curved on dorsosubapical margin in lateral view, with 4 lateral ovisensilla and ca. 13 ventral ones arranged entirely at nearly equal intervals. Spermathecal capsule brown; introvert depth of duct about 5/6 of capsule height.

Measurements: BL = 2.25 (4♂ paratypes: 1.90−2.43, 3♀ paratypes: 2.10−2.50) mm, ThL = 1.11 (0.94−1.08, 1.02−1.17) mm, WL = 2.15 (1.92−2.17, 2.10−2.37) mm, WW = 0.94 (0.82−0.97, 1.02−1.17) mm.

Indices: arb = 2/1 (4♂, 3♀ paratypes: 2/1), FW/HW = 0.45 (0.41−0.45), ch/o = 0.09 (0.08−0.11), prorb = 1.08 (0.98−1.33), rcorb = 0.56 (0.48−0.73), orbito = 1.01 (0.75−1.07), vb = 0.39 (0.35−0.54), dcl = 0.58 (4♂, 2♀ paratypes: 0.44−0.60), dcp = 0.36 (0.31−0.39), sterno = 0.62 (0.57−0.63), m-sterno = 0.76 (3♂, 2♀ paratypes: 0.66−0.77), sctl = 1.00 (4♂, 2♀ paratypes: 0.99−1.07), sctlp = 0.80 (0.84−1.13), C = 3.14 (2.83−3.26), 4c = 0.78 (0.67−0.81), 4v = 1.77 (1.50−1.66), 5x = 1.66 (1.42−1.75), ac = 2.22 (2.11−2.33), M = 0.52 (0.40−0.51), C3F = 0.33 (0.28−0.43).

Holotype. ♂ (#00272), along the way from the seat of Beibeng Town, Motuo County to the Yarang Village, Motuo Town, Motuo County, Linzhi, Xizang, China, 1.x.2010, ex Impatiens ? arguta Hook. f. et. Thoms. ( Fig. 1 D) J.J. Gao ( KIZ).

Paratypes. CHINA: 2♂, 2♀ (#00275, #00682, #00683, #00685), same data as holotype; 2♂, 1♀ (#00306, #00512, #00687), Beibeng, Motuo, Linzhi, Xizang, 29°14′36′′N, 95°10′12′′E, ca. 780 m, 29.ix.2010, ex Impatiens arguta Hook. f. et. Thoms. ( Fig. 1 D), J.J. Gao ( KIZ, SEHU).

Distribution. China (Xizang).

Etymology. Referring to the somewhat bifurcated (furcatus) 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 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).