Impatiophila viasericaria 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 : 42-43

12) Impatiophila viasericaria Fu & Gao , sp. nov.

( Fig. 22 ; Pl. 2C; Pl. 6K)

Diagnosis. Setae of middle row on 2nd costal section mostly heavy, peg-like setae, but not reaching R2+3. Hindleg tibia with 1 black, apically blunt, stout spine at outer apex on underside. Tenth sternite ventrally narrowing, notched medially on dorsal margin ( Fig. 22 D).

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

Thorax (Pl. 2C): Scutum black; scutellum blackish brown to black, paler laterally; pleura yellowish brown except blackish brown mesopleuron.

Wing (Pl. 2C) slightly fuscous, pale brown; veins brown; C1 setea 2, ventral one shorter and thinner. Haltere whitish yellow.

Legs (Pl. 2C) pale yellowish brown.

Abdomen: Tergites variable in pigmentation pattern: nearly entirely black except for blackish brown I in some specimens including the holotype ( Fig. 8 D, Pl. 2C), while III −V each with caudal band medially protruded in some others ( Fig. 8 A −C). Sternites grayish yellow; male VI longer than wide.

Male terminalia ( Fig. 22 A −F): Epandrium pubescent near posterior margin of dorsal 1/2, ventrally with 11 long setae; caudoventral portion rounded apically, with ca. 14 short, stout setulae. Surstylus with 1 seta in addition to 1 stout, upturned prensiseta around caudodorsal corner, 6 apically converging prensisetae along distal margin and 2 short setae near ventral apex. Cercus pubescent near anterior margin, with ca. 21 long setae. Hypandrium slightly narrowing anteriorly. Gonopod short, apically slightly curved ventrad, blunt hook-like in lateral view. Paramere auricular, with somewhat irregularly waved dorsal margin in lateral view, not longer than twice of width, with 6 sensilla. Aedeagal basal process 2/3 as long as paramere.

Female terminalia ( Fig. 22 G, H; P1. 6K): 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 9−11 distally increasing in size on distally concave, ventral margin. Spermathecal capsule dark brown; introvert depth of duct about 1/2 of capsule height.

Measurements: BL = 2.10 (5♂ paratypes: 1.98−2.41; 5♀ paratypes: 2.13−2.50) mm, ThL = 0.97 (0.95−1.08; 0.88−1.16) mm, WL = 2.28 (2.07−2.35; 2.16−2.52) mm, WW = 0.99 (0.93−1.00; 0.90−1.07) mm.

Indices: arb = 2/1 (5♂, 5♀ paratypes: 2−3/1−2), FW/HW = 0.44 (0.42−0.45), ch/o = 0.05 (0.08−0.12), prorb = 1.06 (0.87−1.18), rcorb = 0.56 (0.51−0.68), orbito = 0.96 (0.88−1.23), vb = 0.31 (0.31−0.46), dcl = 0.54 (0.49−0.63), dcp = 0.44 (0.34−0.43), sterno = 0.68 (0.50−0.70), m-sterno = 0.76 (0.71−0.83), sctl = 1.02 (1.01−1.10), sctlp = 1.01 (0.96−1.18), C = 2.47 (2.38−2.76), 4c = 0.86 (0.74−0.87), 4v = 1.57 (1.39−1.60), 5x = 1.46 (1.44−2.04), ac = 2.04 (2.39−3.08), M = 0.45 (0.42−0.50).

Holotype. ♂ (#03579), Huangcaoling, Jinping Town, Jingdong County, Pu’er District, Yunnan, China, 24º22.501´N, 100º46.141´E, ca. 2100 m, 1.ix.2014, ex Impatiens racemosa DC. ( Fig. 1 F), J.J. Gao, M.J. Toda ( KIZ).

Paratypes. CHINA: 1♀ (#01406), Jiujiezi, Baihualing Village, Mangkuan Town, Longyang County, Yunnan, ca. 1900 m, 24.ix.2012, J.J. Gao ( KIZ); 5♂, 2♀ (#03576, #03580, #03702, #03705−7, #03713), same data as holotype; 2♀ (#03729, #03733), Bingbi, Wenjing Town, Jingdong County, Yunnan, ca. 3000 m, 30.viii.2014, ex Impatiens racemosa DC. ( Fig. 1 F), J.J. Gao ( KIZ).

Distribution. China (Yunnan).

Etymology. Pertaining to the distribution area located along the ancient Southern Silk (sericus) Road (via).

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 8. Abdominal color pattern in Impatiophila viasericaria sp. nov. A, paratype ♂ # 03710; B, paratype ♂ # 03705; C, paratype ♂ # 03576; D, holotype ♂ # 03579. Scale lines (dashed) = 0.5 mm.

FIGURE 22. Impatiophila viasericaria Fu & Gao, sp. nov. Adult male (holotype, # 03579) and female (paratype, # 01406): 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).