Epiphragma (Epiphragma) ancistrum, Mao, Meng & Yang, Ding, 2009

Mao, Meng & Yang, Ding, 2009, New species of the genus Epiphragma Osten Sacken from Yunnan, Southwest China (Diptera, Limoniidae), Zootaxa 2121, pp. 44-56 : 50-51

Epiphragma (Epiphragma) ancistrum sp. nov.

( Figs. 3 , 18–23 )

Diagnosis. Femora yellow with two dark brown rings, first behind midlength of femora, second subapical, subequal to yellow tip in length. Wing brown, with small white spots, margin narrow dark brown. Posterior margin of tergite 9 with two small submedian lobes, median area salient with small prominence. Inner gonostylus hairy, with apical half dilated, tip curved into small spine. Interbase with base oblonged, 2/3 as slender rod, thicker in basal half, apex a sharp point and slightly curved inward.

Description. Male. Body length 7.2–7.6 mm, wing 8.0– 8.5 mm.

Head. Brownish yellow except dorsal surface of rostrum brownish. One small median tubercle between eyes. Hairs on head black. Antenna 1.9–2.0 mm. Scape and pedicel brownish yellow, flagellum 13-segmented with two basal segments fused, fusion-segment yellow, succeeding segments brownish black, flagellomeres cylindrical, apical segments elongate, subequal to longest verticils. Proboscis brown with black hairs; palpus black with black hairs.

Thorax. General brown. Pronotum light brown. Prescutum brown with median area pale brownish yellow. Scutum brown with median area brownish black. Scutellum brown. Mediotergite blackish brown with pale gray pollen. Anepisternum and katepisternum reddish brown. Anepimeron and katepimeron pale yellow. Hairs on thorax black. Coxae and trochanters light brownish yellow; femora yellow with two dark brown rings, first behind midlength of femora, second subapical, subequal to yellow tip in length; tibiae yellow with one spur; tarsi light yellow with tips brown. Hairs on legs black.

Wing ( Fig. 3 ) brownish with small white spots, margin narrow dark brown. Anterior half of wing with spots in cell C, around spur of Rs, in cells Cu and A2; anterior half of cell A1 white; posterior half of wing with spots more scattered, especially at tips of all cells; one narrow crossband extending from tip of vein R1 to cell dm. Stigma solidly dark brown. R2+3+4 a little longer than R2+3; m-cu just behind 1/3 length of cell dm. Halter 1.4–1.5 mm long, brownish yellow except base of stem light yellow and knob blackish brown.

Abdomen. Tergites brownish black, with narrow median brown line, posterior margins brownish yellow. Sternites 1–7 brownish yellow, sternites 8–9 brownish black. Hairs on abdomen black.

Hypopygium ( Figs. 18–23 ). Posterior margin of tergite 9 ( Fig. 18 ) with two small submedian lobes, median area salient with small prominence. Outer gonostylus ( Fig. 19 ) slender, hairy, with tip curved into spine. Inner gonostylus ( Fig. 20 ) hairy, with apical half dilated, tip curved into small spine. Interbase ( Fig. 22 ) with base oblonged, 2/3 as slender rod, thicker in basal half, apex a sharp point and slightly curved inward.

Female. Unknown.

Type material. Holotype male, Yunnan: Jinping (1100 m), 22°47΄32ʺN 103°05΄12ʺE, 2006. V. 18, Junhua Zhang. Paratype 1 male, Yunnan: Jinping, Yakou (1600 m), 22°46΄10ʺN 103°03΄0 1ʺE, 2006. V. 18, Junhua Zhang.

Distribution. China (Yunnan).

Etymology. The specific name refers to the hook-like tip of the inner gonostylus.

Remarks. This new species is somewhat similar to E. bicinctiferum Alexander, 1935 from China (Sichuan) in having the similar patterning of the femora, but it can be separated from the latter by the patterning of wing, inner gonostylus with apical half dilated and tip curved into small spine, and interbase with the base oblonged, 2/3 as slender rod, thicker in basal half, apex a sharp point and slightly curved inward. In E. bicinctiferum , the wing is whitish with a handsome buffy brown patterning that is bordered by dark brown; the inner gonostylus has an obtuse tip, and the interbase is a long and slender, filiform rod ( Alexander, 1935).

Figures

FIGURES 1 – 5. Wing (male). 1. Epiphragma (Epiphragma) mediale sp. nov.; 2. Epiphragma (Epiphragma) yunnanense sp. nov.; 3. Epiphragma (Epiphragma) ancistrum sp. nov.; 4. Epiphragma (Epiphragma) breve sp. nov.; 5. Epiphragma (Epiphragma) elongatum sp. nov.

FIGURES 18 – 23. Epiphragma (Epiphragma) ancistrum sp. nov. Male. 18. Ninth tergite, dorsal view; 19. outer gonostylus, lateral view; 20. inner gonostylus, lateral view; 21. hypopygium, lateral view; 22. hypopygium, dorsal view; 23. hypopygium, ventral view.