Sivatipula, Alexander, 1964

Men, Qiu-Lei, Tang, Li, Wu, Li-Mei, Ji, Zhi-Xin & Li, Cong-Hu, 2018, Description of two new species in long-horned crane fly subgenus Tipula (Sivatipula) (Diptera: Tipulidae) from China, Zootaxa 4415 (1), pp. 195-200 : 196

Tipula ( Sivatipula ) multidentata Men sp. nov.

( Figs. 1–13 )

Diagnosis. Body yellow in general; thorax yellow with three brownish-yellow stripes on prescutum; wing brownish-yellow with a light brown stigma; abdomen straw-yellow with lateral stripes brown, segments six and seven black, hypopygium straw-yellow; tergite nine emarginated at posterior margin and densely covered with small black teeth, terminated into two horn-shaped processes at lateral corner.

Material examined: Type specimens 3 males.

Holotype: male, China, Guizhou, Leigongshan National Natural Reserve , 26°21'N, 108°13'E, 17 May 2016, leg. Qiulei Men.

Paratypes: 2 males, Guizhou, Leigongshan National Natural Reserve , 26°21'N, 108°13'E, 2 June 2015, leg. Guoxi Xue.

Description. Adult, length (male): body 14.5–14.7 mm (not including antenna, n = 3); wing 18.6–19.0 mm (n = 3); antenna 18.8–20.0 mm (n = 3).

Head. Straw-yellow with rostrum darker in coloration laterally. Nasus straw-yellow densely covered with black setae. Eye black. Vertex lacking of marking ( Fig. 1 ). Antenna: 12-segmented, distinctly longer than body; scape and pedicel yellow, first flagellomere yellow, rest flagellomeres brown, each flagellomere cylindrical, subequal in length, with abundant black verticils. Head including vertex and rostrum densely covered with black setae. Palpus light brown.

Thorax. Pronotum straw-yellow. Prescutum straw-yellow with three stripes slightly darker in coloration ( Fig. 2 ). Scutum, scutellum and postnotum yellow ( Fig. 2 ). Lateral sides of scutum and scutellum covered with black setae. Pleuron entirely bright yellow ( Fig. 3 ). Legs very slender, coxae and trochanters yellow, femora yellow basally and gradually changed into light brown, tibiae and tarsi light brown. Halter straw-yellow. Wing pale brown, cell sc not darker than ground color, stigma light brown ( Fig. 6 ). Sc slightly longer than R 3 in length, petiole of cell m1 subequal in length to m-m, discal cell narrow ( Fig. 6 ).

Abdomen. Segments one to five yellow with black lateral stripes and irregular median stripe, segments six and seven wholly black ( Fig. 4 ). Hypopygium yellow ( Figs. 4, 5 ). Tergite nine emarginated at posterior margin, terminated into a pair of horn-shaped processes at lateral corners, whole posterior margin of tergite nine densely equipped with black teeth, a pair of lobes generated from ventral-lateral portion of tergite nine which densely covered with black teeth apically ( Figs. 7, 8 ). Sternite nine broad with a V-shaped notch medially, with many long setae on its lateral corners ( Fig. 9 ). Outer gonostylus narrowed and curved, equipped with numerous small black teeth at apex ( Figs. 7–10 ). Inner gonostylus expanded apically, forming two beaks at lateral sides ( Figs. 7–10 ).

Semen pump with compressor apodeme V-shaped ( Fig. 11 ). Posterior immovable apodeme with one median arm and two broad membranous extensions at lateral sides ( Fig. 12 ). Anterior immovable apodeme flattened, expanded and rounded in dorsal view ( Figs. 12, 13 ). Aedeagus elongated, tubular, relatively thick, more than 1.5 times as long as semen pump ( Fig. 13 ).

Distribution. China (Guizhou).

Remarks. T. (S.) multidentata sp. nov. is mostly similar to T. (S.) similis, a species from Guangxi, China, by the body colours as well as the structure of hypopygium. It can be easily distinguished from the latter by the tergite nine which is lacking of finger-shaped processes. The latter species has its tergite nine bearing two finger-shaped processes (Men et al. 2016). There is also a noticeable difference in the shape of the inner gonostylus which is expanded apically in the new species, but broadened at base in T. (S.) similis.

Etymology. The specific epithet is an adjective made up of the Latin ‘ multi ’ with ‘ dentata ’, referring to the dense dentations on posterior margin of tergite nine, apex of ventral-lateral lobes and outer gonostylus.

Figures

FIGURES 1–13. Tipula (Sivatipula) multidentata sp. nov. 1: head, dorsal view; 2: thorax, dorsal view; 3: thorax, lateral view; 4: abdomen, lateral view; 5: hypopygium, lateral view; 6: wing; 7: hypopygium, lateral view; 8: hypopygium, dorsal view; 9: hypopygium, ventral view; 10: inner gonostylus and outer gonostylus, inner view; 11: compressor apodeme, dorsal view; 12: semen pump, dorsal view; 13: semen pump, lateral view.