Tipula ( Sivatipula ) pseudofilicornis, Men, 2020

Tipula ( Sivatipula) pseudofilicornis sp. nov. ( Figs 16–29 View Figures 16–20 View Figures 21–29 )

Diagnosis. Body brownish-yellow in general; thorax dark brown with three brownish-yellow stripes on prescutum, the median one divided by brown vitta; antenna longer than the body length; wing brownish-yellow with a light brown stigma; abdomen brownish-yellow with lateral stripes brown, segments six to eight entirely black, hypopygium black; tergite nine with a pair of horn-shaped processes on lateral corners and a broad median lobe; inner gonostylus with an obtuse lobe and a finger-shaped process on mesal region of outer surface.

Material examined. Holotype male, China, Tibet, Linzhi, Chayu , Shangchayu , 28°43'N, 96°46'E, 8 Jun 2019, leg. Qiulei Men. Paratypes. 3 males, same data as holotype GoogleMaps .

Description. Adult length (male, n =4): body 13.1–13.3mm (not including antenna), wing 15.7–15.9 mm, antenna 15.0– 15.2 mm.

Head. Brownish-yellow with rostrum dark brown laterally ( Fig. 16 View Figures 16–20 ). Nasus brown with black setae apically. Vertex grayish-brown, lacking of marking ( Fig. 16 View Figures 16–20 ). Head including vertex and rostrum densely covered with black setae. Antenna 12-segmented, significantly longer than body; scape, pedicel and first flagellomere brownish-yellow, rest flagellomeres yellowish-brown, each flagellomere subequal in length, cylindrical, with black verticils. Palpus dark brown.

Thorax. Pronotum brown ( Fig. 17 View Figures 16–20 ). Prescutum brown with three brownish-yellow stripes, the median one divided by brown vitta ( Fig. 18 View Figures 16–20 ). Scutum dark brown with two black marks, scutellum brown, postnotum brown with a grayish median vitta ( Fig. 18 View Figures 16–20 ). Pleuron entirely brownish-yellow ( Fig. 17 View Figures 16–20 ). Legs very slender, coxae and trochanters brownish-yellow, femora brownish-yellow with a darker apex, tibiae and tarsi dark brown. Halter with stem yellow, knob black. Wing brownish-yellow, cell sc darker than ground color, stigma light brown ( Fig. 19 View Figures 16–20 ). Rs distinctly longer than R 3, petiole of cell m 1 subequal in length to m-m, 1/3 the length of discal cell ( Fig. 19 View Figures 16–20 ).

Abdomen. Segments one to five brownish-yellow with black lateral stripes, segments six to eight wholly black. Hypopygium black ( Fig. 20 View Figures 16–20 ). Tergite nine with a pair of horn-shaped processes on lateral corners, median lobe broad, shallowly concaved medially, the flange between horn-shaped processes and median lobe deeply concaved ( Figs 21–23 View Figures 21–29 ). Outer gonostylus with apical margin and anterior margin forming a right angle, posterior margin terminagting in a small lobe ( Fig. 24 View Figures 21–29 ). Inner gonostylus broad basally, protruding into a beak, a small obtuse lobe and a finger-shaped processes from its mesal region of outer surface ( Figs 25–26 View Figures 21–29 ). Sternite nine possessing a horn-shaped process which is densely covered with long setae ( Fig. 27 View Figures 21–29 ).

Semen pump with compressor apodeme V-shaped, with a pair of ridges on its arms ( Fig. 28 View Figures 21–29 ). Posterior immovable apodeme being one median arm which curved dorsally. Anterior immovable apodeme flattened, expanded in lateral view ( Fig. 29 View Figures 21–29 ). Aedeagus narrow, elongated, tubular, more than 10.0 times longer than the length of semen pump.

Distribution. China ( Tibet).

Remarks. The new species is closely allied to T. ( S.) filicornis Brunetti, 1918 , another Indian species by similar structure of the hypopygium. It can be easily separated from T. ( S.) filicornis by the outer gonostylus which forms a right angle on dorsal margin. T. ( S.) filicornis has its outer gonostylus Y-shaped and lacking of such right angle.

Etymology. The specific epithet is the name of its related species “ filicornis ” with a Latin prefix “ pseudo ”, emphasizing the morphological similarity of the new species and its related species.