Tipula (Vestiplex) nestor Alexander, 1934

Men, Qiulei, Sun, Zhongqiu & Starkevich, Pavel, 2023, Four new crane fly species of the subgenus Vestiplex (Diptera: Tipulidae: Tipula) from Tibet and Yunnan, China, European Journal of Taxonomy 856, pp. 170-192 : 187-190

Tipula (Vestiplex) nestor Alexander, 1934

Figs 56–70

Tipula (Vestiplex) nestor Alexander, 1934: 28

Tipula (Vestiplex) nestor – Alexander & Alexander 1973: 64.

Diagnosis

The specimen of male Tipula (V.) nestor can be recognized by ventral portion of tergite nine with a pair of black armatures, gonocoxite totally separated from the sternite nine, obtuse apically, without spine; antenna reaching the base of wing if bent backward; wing light brown, cell c more yellowish than ground color, stigma dark brown; basal five abdominal segments yellow with brown ill-defined median lateral and lateral stripes.

Material examined

CHINA • 1 ♂; Yunnan, Gongshan County, Bingzhongluo, Gongdangshenshan Mountain ; 12 Jun. 2019; Men Qiulei and Lv Lin leg.; AQNU .

Redescription

Male ( Figs 56–70 )

MEASUREMENTS. Body length 14.5 mm (excluding antenna, n = 1), wing length 19.2 mm (n = 1), antenna length 3.9 mm (n = 1). General body coloration yellowish-brown.

HEAD ( Fig. 56 ). Rostrum with nasus yellow, densely covered with yellow setae, brown at base. Eye black. Occiput and vertex brownish, with brown median line ( Fig. 56 ). Antenna 13-segmented, if bent backward reaching base of wing. Scape yellow, cylindrical, slightly expanded at apex. Pedicel yellow, oval. Flagellum entirely brown except first flagellomere having slightly yellow basal fourth. First flagellomere longest, almost same length as scape, remaining segments progressively shortened and thinned, bases of each flagellomere enlarged with five brown longest verticils. Longest verticils slightly longer than corresponding flagellomeres, surface of each flagellomere densely covered with short brown setae. Palpus with first segments brown, apical segments yellow.

THORAX ( Figs 57–58 ). Pronotum yellow with medial region brown. Prescutum and presutural scutum brownish with four brown longitudinal stripes, median pair bordered with black margins, separated by gray vitta, lateral stripes bordered with black margins on inner side ( Fig. 57 ). Interspaces gray, densely covered with short white setae ( Fig. 57 ). Postsutural scutum brown, scutal lobes each with two dark brown triangular separated spots ( Fig. 57 ). Scutellum brown with broad black vitta, covered with short yellow setae on lateral sides ( Fig. 57 ). Mediotergite dark brown with black vitta ( Fig. 57 ). Pleura yellowish, thinly dusted with grey ( Fig. 58 ). Leg with coxa and trochanter yellow; femur yellow with darkened and enlarged tip; tibia yellowish at base, gradually changing into dark brown, tip black; tarsal segments dark brown. Wing light brown, cell c more yellowish than ground color, stigma dark brown, variegated by light areas in medial and basal areas of 1 st cell of cell r 1; light band across apical area of cell r 1, base of cells r 3, r 4 and r 5, and median area of discal cell; rest light area including base and apical areas of bm, median region and outer ends of anal cells ( Fig. 59 ).

WING VENATION. R 1 complete, R 3 2.1 × as long as R 2+3+4, R 4 subequal in length to Rs, R 5 curved at apical half, r-m distinctly shorter than base of R 5, discal cell narrow, at least 1.9 × as long as petiole of cell m 1, M 1 at least 2.7 × as long as its petiole ( Fig. 59 ). Halter pale yellow, knob basally brown, apically pale yellow.

ABDOMEN ( Fig. 60 ). Basal five abdominal segments yellow with brown ill-defined median lateral and lateral stripes, latter gradually broader and heavier, rest abdominal segments including hypopygium black ( Fig. 60 ).

HYPOPYGIUM ( Figs 61–70 ). Hypopygium with tergite nine separated from sternite nine except base. Tergite nine completely divided at midline by pale membrane, posterior margin with dee V-shaped median notch ( Figs 61–62 ). Posterolateral angles extended into angular lobe, covered with setae. Dorsal portion of tergite nine divided into two parts by membranous area which has shallow V-shaped notch medially, each part of dorsal portion terminating into an angular terminal which has very strong and dense setae ( Figs 61–62 ). Ventral portion of tergite nine broad, with pair of black armatures; armature with obtuse point on inner side and apically incised. Gonocoxite totally separated from sternite nine, relatively short, obtuse apically, without spine, densely covered with long setae ( Figs 63–64 ). Lobe of gonostylus small, blade-shaped ( Figs 65–66 ). Clasper of gonostylus with upper beak obtuse and black, lower beak splitted into flattened, round and transparent lobe and smaller, obtuse and black point; dorsal crest elongated, median area of lobe of gonostylus equipped with strongly straight setae ( Figs 65–66 ). Sternite nine with ventral lobe of A9S small and rounded, densely covered with setae; dorsal lobe of A9S broad at base, gradually narrowed to round apex which bears five long setae ( Figs 64, 67 ). Adminiculum massive, broadened at base, obtuse apically, median portion protruded, shallow preapical incision in ventral view ( Figs 63–64 ). Semen pump with central vesicle slightly swollen ( Fig. 69 ). Ejaculatory apodeme fan-shaped, medially with small V-shaped notch, slightly longer than posterior immovable apodeme ( Fig. 68 ). Posterior immovable apodeme in shape of short arrn ( Fig. 69 ). Anterior immovable apodeme narrow plate ( Fig. 70 ). Aedeagus thick at base, gradually narrowed towards apex, more than 3.5 × as long as semen pump ( Fig. 69 ).

Female

Unknown.

Distribution

China: Taiwan ( Alexander, 1934); Yunnan, new record for mainland China.

Figures

Figs 56–60. Tipula (Vestiplex) nestor Alexander, 1934, ♂, AQNU. 56. Head, dorsal view. 57. Thorax, dorsal view. 58. Thorax, lateral view. 59. Wing. 60. Abdomen, lateral view. Scale bars = 1.0 mm.

Figs 61–70. Tipula (Vestiplex) nestor Alexander, 1934, ♂, AQNU. 61. Hypopygium, dorsal view. 62. Tergite nine, ventral view. 63. Hypopygium, lateral view. 64. Hypopygium, ventral view. 65. Left lobe and clasper of gonostylus, lateral view. 66. Left lobe and clasper of gonostylus, dorsal view. 67. Dorsal lobe of A9S. 68. Ejaculatory apodeme of semen pump. 69. Semen pump, lateral view. 70. Semen pump, dorsal view. Scale bars: 61–64 = 1.0 mm; 65–67 = 0.7 mm; 68–70 = 1.0 mm.