Tipula (Vestiplex) guibifida Yang & Yang, 1992

Men, Qiu-Lei, Starkevich, Pavel, He, Li-Fan, Shi, Jian-Xiong, Shi, Mei-Ying, Zhang, Zhong-Xin, Hu, Jia-Hui, Chen, An & Zhang, Yi-Xue, 2021, Tipula (Vestiplex) from Yunnan and Tibet, China: one new species and redescriptions of five known species (Diptera: Tipulidae), Acta Entomologica Musei Nationalis Pragae 61 (2), pp. 341-362 : 347-351

Tipula (Vestiplex) guibifida Yang & Yang, 1992 ( Figs 32–49 )

Tipula (Vestiplex) guibifida Yang & Yang, 1992: 577 (original description)

Tipula (Vestiplex) guibifida : YൺඇG et al. (2006: 447).

Type locality. China, Guizhou, Jiangkou, Fanjingshan.

Material examined. CHINA: Tංൻൾඍ: 3 ♂♂, Zhuolonggou, Bomi, 31.v.2019, coll. Q. Men ( AQNU). Yඎඇඇൺඇ: 1 ♂ 3 ♀♀, Zhangdian near Tuguancun, Lijiang, 27°29′42.0″N 99°53′42.0″E, 3200 m, 24-25.v.2012, A. Floriani ( NRC). SංർHඎൺඇ: 1 ♂ 4 ♀♀, Erlang Shan Mountain, Kangding, Ya’an, 29°52′23.5″N 102°18′35.6″E, 2100 m, 10.–11.iv.2010, A. Saldaitis ( NRC); 1 ♂ 12 ♀♀, Menghugang, Kangding, 29°49′57.3″N 102°02′49.6″E, 3000 m, 12.iv.2010, A. Saldaitis ( NRC).

Redescription. Male ( Figs 32–36 ). Body length 11.8–16.6 mm (excluding antenna, n = 8), wing length 14.8–17.2 mm (n = 8), length of antenna 3.1–3.4 mm (n = 8).

Head. Generally yellowish-brown, vertex and occiput bright with brown linear mark which is pale on vertex, darkened near base of antenna ( Fig. 32 ). Rostrum yellowish-brown except for yellow dorsal surface, nasus yellow, relatively stout, truncated apically.Antenna 13-segmented, if bent backward reaching slightly beyond root of wing. Scape and pedicel yellow. Flagellum with first flagellomere elliptical, light brown, rest of flagellomeres bicolored, enlarged base dark brown, rest yellowish-brown, flagellomeres two to four subequal in length, rest gradually shorter, last segment ball-shaped, basal enlargement with longest verticils subequal in length to corresponding flagellomeres. Whole flagellum densely covered with short and light setae. Palpus with basal three segments yellow, expanded apically, last segment brown, slightly longer than basal three segments together.

Thorax. Pronotum yellow. Prescutum and presutural scutum yellowish-brown with four light brown stripes, median stripes fused at base, separated by yellowish line anteriorly, lateral stripes, marginally suffused with brown on inner side ( Fig. 33 ). Interspace between median and lateral stripes yellowish-brown with light and short setae. Scutum yellowish-brown, each lobe with two brown triangular markings connecting to each other, marginally suffused with dark brown on inner side, between lobes with narrow brown vitta ( Fig. 33 ). Scutellum yellowish-brown with dark median vitta ( Fig. 33 ). Postnotum yellow with dark vitta not extending through postnotum ( Fig. 33 ). Pleuron with anepisternum brown, katepisternum light brown, rest of areas yellow ( Fig. 34 ). Legs with coxae and trochanters yellow, femora with base yellow, gradually changing to brown, tip black, with yellow preapical ring of same length as black tip, tibiae and tarsi entirely black. Halter with stem yellow, knob black. Wing brown, cells c and sc slightly darker than ground color; stigma dark brown, base of stigma with round bright spot; bright band extending backward, crossing bases of cells r 1, r 3, r 4, r 5 and median area of discal cell, ending at base of cell m 3; another bright band extending backward from apical area of cell c to apical area of bm; other bright areas including bases of bm, cells cua and cup and four bright spots along posterior margin ( Fig. 35 ). Venation: R 1 entire, R 2+3+4 shorter than R 3, R 4 slightly shorter than Rs, R 5 curved at apical two fifths, r-m subequal in length to base of R 5, discal cell narrow, more than 2.8 times longer than petiole of cell m 1, cell m

1

more than four times longer than its petiole ( Fig. 35 ).

Abdomen. Basal four tergites yellow with brown lateral and median stripes, the latter broad and intermittent, basal four sternites entirely yellow ( Fig. 36 ). Rest of abdominal segments including hypopygium black ( Fig. 36 ).

Male hypopygium. Male hypopygium relatively small. Tergite nine and sternite nine separated except for base ( Fig. 37 ). Tergite nine almost divided by membranous area medially into two lobes, each densely covered with long setae on dorsal surface; posterior border of dorsal portion of tergite nine concave into V-shaped notch, with many long setae along its margin; lateral borders relatively straight; ventral portion of tergite nine broad and triangular, with pair of triangular darkened plates ( Figs 38, 39 ). Gonocoxite small, totally separated from sternite nine, bifurcated, upper lobe round, lower lobe curved dorsally in lateral view, truncated apically in dorsal view ( Figs 37, 39, 40 ). Inner gonostylus with dorsal crest narrow, with upper beak elongated, its inner margin suffused with black, lower beak split into two big, rounded, blackened plates ( Fig. 41 ). Outer gonostylus narrow ( Fig. 41 ). Sternite nine broad, densely covered with setae on lateral surface, appendage of sternite nine possessing thumb-like ventral lobe with many long setae, with dorsal lobe narrow and long, acute apically, pointing inwards ( Fig. 39 ). Adminiculum broad basally with raised margin, narrowed to acute apex in dorsal view, curved ventrad, truncated apically in lateral view ( Figs 39, 40 ). Median sclerite of adminiculum conspicuous ( Fig. 41 ). Semen pump with compressor apodeme fan-shaped, shallowlly emarginated medially ( Fig. 42 ). Posterior immovable apodeme with paired arms straight, terminating into obtuse apex in lateral view ( Figs 43, 44 ). Anterior immovable apodeme broad, flattened, elongated in dorsal view ( Fig. 43 ). Aedeagus relatively thick, gradually narrowed to apex, more than 3.5 times longer than semen pump ( Fig. 44 ).

Female. Body length 17.0– 21.9 mm (excluding antenna, n = 17), wing length 15.2–19.6 mm (n = 17), length of antenna 2.5–3.0 mm (n = 17). Generally similar to male in body coloration.Antenna relatively short, if bent backward reaching beyond pronotum.

Female terminalia. Tergites nine and ten shining light brown. Cercus light brown, relatively short, nearly straight with tip rounded. Ventral and dorsal margins with small, distinct serration.

Hypovalva in shape of short pale-yellow plates, terminating into narrowed tip ( Figs 45, 46 ). Base of hypovalvae covered by posterior margin of sternite nine, the latter lightly extended, rounded at tip and provided with setae. Median incision between hypovalvae of almost same depth as posterior margin of sternite eight ( Fig. 47 ). Lateral incision absent. Sternite nine with anterior parts flattened ( Fig. 48 ). Posterior part of sternite nine covered with short filaments, shovel-shaped, medially with shallow groove, posterior margin with median triangle projection, laterally with incisions ( Fig. 48 ). Furca elongated, in shape of narrow stripe, anteriorly flattened ( Fig. 48 ). Spermatheca spherical, lightly broadened at base ( Fig. 49 ).

Distribution. China: Guizhou (YൺඇG & YൺඇG 1992); Sichuan (new record), Tibet (new record), Yunnan (new record).

Figures

Figs 32–36. Tipula (Vestiplex) guibifida Yang & Yang, 1992, male. 32 – head, dorsal view; 33 – thorax, dorsal view; 34 – thorax, lateral view; 35 – wing; 36 – abdomen and hypopygium, lateral view.

Figs 37–44. Tipula (Vestiplex) guibifida Yang & Yang, 1992, male. 37 – hypopygium, dorsal view; 38 – tergite nine, caudal view; 39 – hypopygium, lateral view; 40 – hypopygium, ventral view; 41 – left outer and inner gonostyli, lateral view; 42 – compressor apodeme, dorsal view; 43 – semen pump, dorsal view; 44 – semen pump, lateral view.Abbreviations: dl – dorsal lobe of A9S; vl – ventral lobe of A9S.

Figs 45–49.Tipula (Vestiplex) guibifida Yang &Yang, 1992, female. 45 – female terminalia, dorsal view; 46 – female terminalia, lateral view; 47 – sternite eight with hypovalvae, ventral view; 48 – sternite nine with furca, dorsal view; 49 – spermatheca.