Diplonevra pilisparsa, Liu & Disney, 2024

Liu, Guang-Chun & Disney, R. Henry L., 2024, Revisionary notes on the genus Diplonevra Lioy (Diptera: Phoridae) and a new key to species from China, Zootaxa 5446 (3), pp. 433-440 : 435-436

2. Diplonevra pilisparsa sp. nov.

( Figs. 5–8 , 16 )

Descripton. Male. Frons ( Fig. 5 ) dark brown, with 50–70 scattered setulae. Supra-antennal setae below lower interfrontal setae and closed to each other. First row of frontal setae lightly convex, lower interfrontal setae further apart than either is from a lower fronto-orbital seta. Second row lightly concave, all four setae are equidistant. First flagellomere dark brown, oval. Palpus brown and 2.5 times as long as its breadth, with 6 setae on ventral apex. Proboscis whitish yellow.

Scutum and scutellum dark brown, with 3 notopleural setae. Scutellum with 4 setae. Legs dark brown. Front tibia with a dorsal seta at two fifths of length from base and with 8–10 small differentiated setulae extending below this to the tip. Mid tibia with 2 longitudinal setal palisades, anterodorsal one almost straight and extending to 2/3 (0.69) of tibia. Posterior face of hind trochanter with 2 upper setae and 4 lower setae, and with 7–8 fine curved setulae in middle area. There are also dense microtrichia on dorsobasal and ventrobasal parts. Posterior face of hind femur with 3–4 strong lower setae and 1 strong upper seta, which only a little weaker than lower ones ( Figs. 6 , 16 ). Hind tibia with 2 setal palisades and with 2 anteroventral setae. Wing ( Fig. 7 ) length 2.15–2.17 mm, width 1.03–1.04 mm. Costal index 0.52–0.54. Costal ratios 3.86–3.80:1:1.04–1.06. Costal cilia length 0.06–0.08 mm. Apex of costa a little swollen; Vein M 1 curved. Alula with 5 setae. All veins brown and membrane yellowish brown. Halter brown.

Abdominal tergites dark brown.Venter dark grayish brown.Male terminalia ( Fig.8 )dark brown. Left side of epandrium a little triangular, with about 10 long setulae, the longest one at the posteroventral corner. Right side of epandrium broad, with about 10 long setulae toward posterior margin. Hypandrium with pubscence, without setulae. Cerci and proctiger light brown basally and whitish brown apically.

Body length 1.90–1.95 mm.

Female. Similar to male. Body length 2.8 mm. Wing length 2.28 mm, width 1.02 mm. Costal index 0.51. Costal ratio 3.24: 1: 1. Costal cilia length 0.07 mm.

Distribution. China (Beijing).

Etymology. The specific epithet is derived from Latin words pilus (hair) and sparsus (sparse), referring to the character of frons.

Specimens examined. Holotype, ♂ (slide), Beijing, Huairou, Labagoumen (40°33'36"N, 116°37'36"E), 7-VI-2016, Tao Li . Paratypes. 8 ♂, same data as in holotype ; 1♂, Beijing, Huairou, Labagoumen (40°33'36"N, 116°37'36"E), 5- VI-2016, Tao Li ; 1♂, Beijing, Huairou, Labagoumen (40°33'36"N, 116°37'36"E), 26-VI-2016, Tao Li ; 1♂, Beijing, Huairou, Labagoumen (40°33'36"N, 116°37'36"E), 2-VII-2016, Tao Li ; 1♂, Beijing, Huairou, Labagoumen (40°33'36"N, 116°37'36"E), 29-VIII-2016, Tao Li ; 3♂, Beijing, Huairou, Labagoumen (40°33'36"N, 116°37'36"E), 18-VIII-2010, Tao Li ; 2♂, Beijing, Huairou, Labagoumen (40°33'36"N, 116°37'36"E), 3-IX-2010, Tao Li .

Remarks. The species is very similar to D. incisura Lee et al. 2022 , but it differs by fewer setulae on frons and the stronger upper setae on posterior face of hind femur.

Figures

FIGURES 5–8. D. pilisparsa sp. nov. 5. head; 6. hind femur and trochanter; 7. wing; 8. male terminalia. Scale bars = 0.2 mm (5, 7); 0.1 mm (6, 8).

FIGURES 16–19. Hind femora and trochanters. 16. D. pilisparsa sp. nov.; 17. D. incisura Lee et al.; 18. D. nigritarsis Lee et al.; 19. D. taigaensis Michailovskaya.