Nephrotoma claviformis Yang & Yang, 1987

Yang, Qi-Cheng, Liu, Qi-Fei, Pan, Zhao-Hui, Liu, Xiao-Yan & Yang, Ding, 2020, Nephrotoma Meigen (Diptera, Tipulidae) from Xizang Autonomous Region, China, ZooKeys 973, pp. 123-151 : 123

Nephrotoma claviformis Yang & Yang, 1987 Figs 10-11 , 12-16

Nephrotoma claviformis Yang & Yang, 1987: 129. Type locality: China: Xizang, Nyingchi Co.

Diagnosis.

Spots on head velvety. Vertex with rectangular, dark-brown spots near inner margin of eye. Scutellum dark brown. Mediotergite with a brown longitudinal spot at middle (Fig. 11 ). Tergite 9 with a pair of short rod-like projections (Fig. 12 ).

Material examined.

2 males (CAU), China: Xizang, Lulang, 1978.VI.10, 3400 m, Fasheng Li.

Description.

Males (n = 2): body length 11.0-11.1 mm, wing length 11.8-12.0 mm, antenna length 3.0 mm.

Head (Figs 10 , 11 ). Mainly yellow. Vertex with velvety, dark-brown, rectangular spots near inner margin of eye. Occipital marking annular, velvety, dark brown. Face with short, linear marking. Dorsal part of rostrum including nasus brownish black. Head with brown hairs. Antenna brownish black, with dark-brown hairs, except scape and pedicel dark brownish yellow; first flagellomere 1.6 times as long as second one. Proboscis brown, with dark-brown hairs. Palpus brown, with brownish-yellow hairs.

Thorax (Figs 10 , 11 ). Mainly yellow. Pronotum mainly yellow, with dark-brown spots on lateral side. Prescutum with three black, longitudinal stripes bearing velvety margin. Scutum with two black spots bearing velvety margin. Scutellum dark brown. Mediotergite yellow, with a brown, velvety, longitudinal stripe at middle. Anepisternum and katepisternum each with a brown lower spot and black posterior margin. Anepimeron and katepimeron each with a small, pale-brown spot. Meron with black lower part. Parascutellum yellow, anatergite yellow, katatergite with black posterior margin. Legs dark yellow except tips of tibiae, femora, and tarsi dark brown. Hairs on legs brownish, except those on coxae yellow. Wing subhyaline, tinged with light brown; pterostigma brownish; vein of cell m1 sessile (Fig. 10 ). Halter with yellow stem; knob dark yellow.

Abdomen (Fig. 10 ). Mainly yellow. Abdominal tergites with brown mid-longitudinal stripe and brownish-black lateral stripe. Hairs on abdomen yellow.

Hypopygium (Figs 12-16 ) brownish black. Tergite 9 medially slightly produced at posterior margin, tergite 9 with a pair of rod-like projections on posterior margin (Fig. 12 ). Outer gonostylus short rod-like (Fig. 16 ). Inner gonostylus anteriorly with a sharp beak at tip, laterally with a lobe at base (Fig. 14 ).

Distribution.

China (Xizang).

Remarks.

This species is similar to N. distans Edwards, 1928 from Xizang, the inner gonostylus is similar, but the latter differs in the following characters: occipital marking triangular, scutellum and postnotum pale; tergite 9 without rod-like projections on posterior margin.

Figures

Figures 10, 11. Nephrotoma claviformis Yang & Yang, 1987. 10 Male habitus, lateral view 11 head and thorax, dorsal view. Scale bars: 1.0 mm.

Figures 12 - 16. Nephrotoma claviformis Yang & Yang, 1987. 12 Tergite 9, dorsal view 13 hypopygium, ventral view 14 inner gonostylus, lateral external view 15 hypopygium, lateral view 16 outer gonostylus, lateral external view. Scale bars: 0.5 mm (12, 13, 15); 0.1 mm (14, 16).