Impatiophila ptyonosternata 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 : 38-39

9) Impatiophila ptyonosternata Fu & Gao , sp. nov.

( Fig. 19 ; Pl. 1H; Pl. 6H)

Diagnosis. Setae of middle row on 2nd costal section all heavy, peg-like, present beyond tip of R2+3. Abdominal tergites III‒V each with caudal, black band medially protruded (Pl. 1H). Hindleg tibia without black, apically blunt, stout spine at outer apex on underside. Male abdominal sternite VI wider than long. Tenth sternite somewhat triangular, roundly convex on dorsal margin ( Fig. 19 D); gonopod apically narrowing, finger-shaped in lateral view ( Fig. 19 F).

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

Thorax (Pl. 1H): Postpronotum yellow to yellowish brown; scutum black to blackish brown, pale along transverse suture and throughout lines of ipsilateral dorsocentral setae; scutellum blackish brown, pale laterally; pleura yellowish brown to brown.

Wing (Pl. 1H) hyaline; veins yellowish brown. C1 setae 2, subequal. Haltere pale yellow.

Abdomen (Pl. 1H): Tergites yellow, with black caudal bands broadened laterally. Sternites grayish brown; male VI posteriorly wider, concave on posterior margin.

Male terminalia ( Fig. 19 A–F): Epandrium pubescent except for anterial and ventral portions, ventrally with 12 long setae; caudoventral portion broad, obliquely truncate apically, with ca. 19 short, stout setulae. Surstylus with 1 seta in addition to 1 stout, upturned prensiseta at caudodorsal corner, 6 apically converging prensisetae along distal margin and 1 short seta near ventral apex. Cercus pubescent on anterior half, with ca. 26 long setae. Hypandrium long, largely parallel-sided. Paramere curved dorsad and longer than twice of width in lateral view, with 6 sensilla. Aedeagal basal process slightly longer than 1/2 length of paramere.

Female terminalia ( Fig. 19 G, H; Pl. 6H): Oviscapt valve gently curved on dorsosubapical margin and less expanded dorsomedially in lateral view, with 6 dorsal ovisensilla, 13−14 lateral ones on slightly convex margin of broad apicolateral flap and 12−14 distally increasing in size on nearly straight, ventral margin. Spermathecal capsule brown; introvert depth of duct about 1/2 of capsule height.

Measurements: BL = 2.63 (2♂ paratypes: 2.78−2.83, 3♀ paratypes: 2.41−2.81) mm, ThL = 1.10 (1.16−1.16, 1.06−1.20) mm, WL = 2.62 (2.73−2.75, 2.53−2.91) mm, WW = 1.14 (1.17−1.20, 1.16−1.30) mm.

Indices: arb = 3/1 (2♂, 3♀ paratypes: 3/1), FW/HW = 0.46 (0.46−0.48), ch/o = 0.13 (0.10−0.15), prorb = 0.97 (0.97−1.05), rcorb = 0.53 (0.58−0.66), orbito = 1.19 (0.81−1.20), vb = 0.31 (0.26−0.38), dcl = 0.47 (0.52−0.63), dcp = 0.40 (0.35−0.39), sterno = 0.68 (0.62−0.69), m-sterno = 0.82 (0.76−0.81), sctl = 1.06 (0.99−1.06), sctlp = 1.01 (1.02−1.13), C = 2.58 (2.46−3.08), 4c = 0.78 (0.68−0.84), 4v = 1.50 (1.47−1.65), 5x = 1.50 (1.50−1.64), ac = 2.83 (2.51−2.92), M = 0.41 (0.42−0.46), C3F = 0.12 (0.00−0.20).

Holotype. ♂ (#00296), Tongmai Village, Yigong Town, Bomi County, Linzhi District, Xizang, China, 30°06′10′′N, 95°04′49′′E, ca. 2080 m, 9.x.2010, ex Impatiens ? arguta Hook. f. et. Thoms. ( Fig. 1 D), J.J. Gao ( KIZ).

Paratypes. CHINA: 1♂, 3♀ (#00297, #00313, #00463, #00464), same data as holotype; 1♂ (#00538), along the way from Beibeng Town to Yarang Village, Motuo Town, Motuo County, Linzhi District, Xizang, 1.x.2010, ex Impatiens ? arguta Hook. f. et. Thoms. ( Fig. 1 D), J.J. Gao ( KIZ, SEHU).

Distribution. China (Xizang).

Etymology. Referring to the tenth sternite (sternum) shaped like fan (ptyon).

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 19. Impatiophila ptyonosternata Fu & Gao, sp. nov. Adult male (holotype, # 00296) and female (paratype, # 00297): 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).