Tipula (Formotipula) melanomera gracilispina Savchenko, 1960

Zhang, Bing, Ren, Jinlong, Li, Yan & Yang, Ding, 2020, New and little-known species of Tipula Linnaeus (Diptera, Tipulidae) from Laos, with a new synonym, ZooKeys 982, pp. 11-31 : 11

1. Tipula (Formotipula) melanomera gracilispina Savchenko, 1960 Figs 1-4 , 5-7 , 8-10

Tipula melanomera gracilispina Savchenko 1960: 888. Type locality: China: Yunnan.

Tipula (Formotipula) melanomera gracilispina : Li et al. 2013: 207.

Diagnosis.

Hypopygium is blackish with black setae. Posterior margin of ninth tergite has a low U-shaped notch. Posterior margin of eighth sternite has a pair of digitiform appendages. Clasper of gonostylus is complex, broad, and short; beak slender.

Redescription.

Male (n = 5): Body length 13-15 mm, wing length 14-16 mm, antenna length 3.5-4.0 mm.

Head (Figs 1 , 3 ). Mostly velvet black. Eyes dark black. Dorsal part of rostrum brownish black. Setae on head black. Antenna dark brown except scape and pedicel brownish with black setae; palpus brownish grey with black setae.

Thorax (Figs 1 , 3 , 4 ). Mainly bright orange. Prescutum orange with yellowish-white pollen; pleuron mostly yellowish orange with yellow setae. Legs: coxae and trochanters grayish brown; femora brownish black; tibiae and tarsi dark brown. Setae on legs black except coxae and trochanters with yellow setae. Wing brownish; pterostigma dark brown with some macrotrichiae; venation brownish black, Rs relatively long, cell m1 petiolate (Fig. 4 ). Halter length approximately 2 mm, halter stem brownish with brown setae; halter brown with black setae.

Abdomen (Fig. 1 ). Mainly dull orange. Abdominal segments 1-7 orange with brownish setae. Hypopygium blackish with black setae.

Hypopygium (Figs 5-7 ). Posterior margin of ninth tergite with a shallow, U-shaped notch. Posterior margin of eighth sternite with a pair of digitiform appendages. Clasper of gonostylus complex (Fig. 7 ), beak with triangular, membranous dorsal lobe, dorsal crest with a sickle-shaped dorsal process, basal beak and posterior crest with short setae; face of dististyle with a slender, acute, upwardly tilted spine.

Female (n = 3): Body length 13-15 mm, wing length 14-16 mm, antenna length 3-4 mm.

Female resembles male in head and thorax, except abdomen plump. Eighth tergite and eighth sternite black throughout with black setae. Ninth tergite, ninth sternite, and tenth tergite dark black, with black setae (Fig. 2 ).

Ovipositor (Figs 8-10 ). Ninth tergite with two lobes separated by V-shaped, median emargination; each lobe with long black setae at tip. Ninth sternite slender. Cerci short, fleshy, apically obtuse. Tenth sternite flat with setae. Hypovalves small, sclerotized, sharply pointed, with black setae.

Material examined.

3 males 1 female (CAU), Laos: Houaphanh, Sam Nuea, Hvay Ma, 2017.VI.8, Liang Wang. 2 males 2 females (CAU), Laos: Attapeu, Sok. Samakhi Vay N. B., 2017.VI.18, Liang Wang.

Distribution.

China (Guizhou, Yunnan), Laos (Houaphanh).

Figures

Figures 1 - 4. Tipula (Formotipula) melanomera gracilispina Savchenko 1 male habitus, lateral view 2 female habitus, lateral view 3 male thorax, dorsal view 4 male right wing. Scale bar: 1.0 mm.

Figures 5 - 7. Tipula (Formotipula) melanomera gracilispina Savchenko, male 5 hypopygium, lateral view 6 ninth tergite, dorsal view 7 clasper of gonostylus, lateral view. tg 8 = eighth tergite, tg 9 = ninth tergite, st 8 = eighth sternite, st 9 = ninth sternite, lg = lobe of gonostylus. Scale bars: 1.0 mm (5, 6); 0.5 mm (7).

Figures 8 - 10. Tipula (Formotipula) melanomera gracilispina Savchenko, female 8 ovipositor, lateral view 9 ninth tergite and cerci, dorsal view 10 hypovalves, ventral view. tg 8 = eighth tergite, tg 9 = ninth tergite, st 9 = ninth sternite. Scale bars: 0.5 mm (8 - 10).