Tipula (Vestiplex) cibagouensis, Men & Sun & Starkevich, 2023

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 : 172-176

Tipula (Vestiplex) cibagouensis sp. nov.

urn:lsid:zoobank.org:act:5A6DF78C-1A32-42B5-BCF4-9C145B226EC5

Figs 1–15

Diagnosis

Tipula (Vestiplex) cibagouensis sp. nov. can be recognized by the tergite nine having a pair of thumbshaped lobes at posterior border and a pair of black, nearly triangular lobes; gonocoxite bearing caudally pointed spine and blade-shaped, apically obtuse dorsal lobe of A9S; antenna reaching base of wing if bent backward, flagellum brown, except yellow base of the first flagellomere; wing light brown with dark brown stigma; basal five abdominal segments yellow, trivittate, rest abdominal segments including hypopygium dark brown.

Etymology

The specific epithet refers to the type locality of new species, Cibagou National Nature Reserve, Chayu County, Tibet, China; adjective.

Material examined

Holotype CHINA • ♂; Tibet, Chayu County; Cibagou National Nature Reserve ; 6 Jun. 2019; Q. Men and Lin Lv leg.; AQNU.

Paratypes CHINA • 2 ♂♂; Tibet, Chayu County, Shangchayu ; 8 Jun. 2019; Q. Men and Lin Lv leg.; AQNU .

Comparative Other material examined

INDIA • ♂; holotype of Tipula (Vestiplex) wahlgrenana Alexander, 1968 ; Kumaon, Khumyara, Pauri Garhwal ; alt. 4300–5000 feet; 28 May 1958; F. Schmid leg.; antennae, leg, wing and genitalia on slide mounted; USNM .

INDIA • ♂; holotype of Tipula (Vestiplex) exechostyla Alexander, 1964 ; Manipur, Sirhoi Kashong ; alt. 7500 feet; 13 Jul. 1960; F. Schmid leg.; USNM • 1 ♂; paratype of Tipula (Vestiplex) exechostyla ; Manipur, Sirhoi Kasong ; alt. 7500 feet; 11 Jul. 1960; F. Schmid leg.; antennae, leg, wing and genitalia on slide mounted; USNM • 1 ♂; paratype of Tipula (Vestiplex) exechostyla ; same collection data as for preceding; USNM • 1 ♂; paratype of Tipula (Vestiplex) exechostyla ; Manipur, Hkayam Boum ; alt. 8500 feet; 21 Jun. 1960; F. Schmid leg.; antenna, leg, wing and genitalia on slide mounted; USNM • 1 ♂; paratype of Tipula (Vestiplex) exechostyla ; Manipur, Sirhoi Kasong ; alt. 6000 feet; 8 Jun. 1960; F. Schmid leg.; antenna, legs, wing and genitalia on slide mounted; USNM • 2 ♂♂; paratypes of Tipula (Vestiplex) exechostyla ; same collection data as for preceding; USNM • 1 ♂; paratype of Tipula (Vestiplex) exechostyla ; Manipur, Sirhoi Kasong ; alt. 7500 feet; 11 Jul. 1960; F. Schmid leg.; antennae, leg, wing and genitalia on slide mounted; USNM • 1 ♂; paratype of Tipula (Vestiplex) exechostyla ; same collection data as for preceding; ZIN • 1 ♂; paratype of Tipula (Vestiplex) exechostyla ; Manipur, Hkayam Boum ; alt. 8500 feet, 21 Jun. 1960; F. Schmid leg.; BMNH (E)#246044; BMNH • 1 ♂; paratype of Tipula (Vestiplex) exechostyla ; Manipur, Sirhoi Kasong ; alt. 7500 feet; 12 Jul. 1960; F. Schmid leg.; ZFMK .

MYANMAR • ♂; holotype of Tipula (Vestiplex) gandharva Alexander, 1951 ; Adung Valley , Camp I ; alt. 8000 feet; 4 Jun. 1931; Kingdon Ward and Lord Cranbrook leg.; antenna, leg, wing and genitalia on slide mounted; USNM .

Description

Male ( Figs 1–15 )

MEASUREMENTS. Body length 11.5–11.8 mm (excluding antenna, n = 3), wing length 17.1–17.4 mm (n = 3), length of antenna 3.5–3.7 mm (n = 3). General body coloration brownish-yellow.

HEAD ( Fig. 1 ). Rostrum with nasus yellow, densely covered with yellow setae. Eye black. Occiput and vertex yellow, medially with black line and rhombic marking ( Fig. 1 ). Antenna 13-segmented, if bent backward reaching base of wing. Scape yellow, cylindrical, slightly expanded at apex; pedicel yellow, oval. First flagellomere yellow except apical third brown, rest flagellomeres brown, basal five flagellomeres subequal in length to each other, remaining segments progressively shortened and thinned, last flagellomere oval. Each flagellomere except first one enlarged at base, with five yellow longest verticils. Verticils slightly longer than corresponding flagellomeres, surface of each flagellomere densely covered with short brown setae. Palpus yellow.

THORAX ( Figs 2–3 ). Pronotum yellow with lateral regions darker in coloration, medially with darkened vitta. Prescutum and presutural scutum brownish with four brown longitudinal stripes, bordered by darker brown ( Fig. 2 ). Intermediate pair separated, interspaces gray, densely covered with short yellow setae ( Fig. 2 ). Postsutural scutum brown, scutal lobes each with two dark brown spots, lower one distinctly bigger ( Fig. 2 ). Scutellum brownish with dark brown median vitta ( Fig. 2 ). Mediotergite dark brown with broad black median line ( Fig. 2 ). Pleura brownish, thinly dusted with grey ( Fig. 3 ). Leg with coxa and trochanter yellow, femur yellow with darkened tip, tibia and tarsal segments dark brown. Wing light brown, cell c more yellowish than ground color, stigma dark brown, variegated by light areas including apical area of cell c and most part 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 basal area of discal cell; rest light area including basal and medial areas of bm, basal half of posterior cubital cell, and basal area of anal cells ( Fig. 4 ).

WING VENATION. R 1 complete, R 3 almost same length to R 2+3+4, R 4 slightly longer than Rs, R 5 curved at apical half, base of R 5 2.0 × as long as r-m, discal cell narrow, at least 2.0 × as long as petiole of cell m 1, M 1 almost 4.4 × as long as its petiole ( Fig. 4 ). Halter pale yellow, knob basally black, densely covered with black setae, apically pale yellow.

ABDOMEN ( Fig 5 ). Basal five abdominal segments yellow with brown lateral and median stripes, lateral stripes gradually broader and heavier, median stripe broad and intermittent, rest abdominal segments including hypopygium dark brown ( Fig. 5 ).

HYPOPYGIUM ( Figs 6–15 ). Hypopygium with tergite nine and sternite nine not separated. Tergite nine completely divided at midline by pale membrane ( Figs 6–7 ). Dorsal portion of tergite nine with pair of thumb-shaped lobes at posterior border, obtuse at lateral corners ( Figs 6–8 ). Ventral portion of tergite nine broad, its inner margin with pair of strongly sclerotized, black, nearly triangular lobes which are protruding and can be observed in dorsal view; inner margin of lobes bearing microscopic serration ( Figs 7–8 ). Gonocoxite separated from sternite nine totally, broad basally and narrowed to caudally pointed spine ( Figs 8–9 ). Lobe of gonostylus narrow and elongated ( Figs 6, 8, 10 ). Clasper of gonostylus slightly elongated and flattened; upper beak black and acute, beneath preceeded by black rod; lower beak black, oval lobe; dorsal margin with obtuse angle ( Figs 6, 8–10 ). Sternite nine with ventral lobe of A9S strong, thumb-like, densely covered with long setae ( Fig. 9 ); dorsal lobe of A9S blade-shaped, broad basally, gradually narrowed to obtuse apex ( Fig. 11 ). Adminiculum triangular in ventral view, with broad base and narrow apex; median portion protruded ( Fig. 9 ). Semen pump with central vesicle swollen ( Fig. 13 ). Ejaculatory apodeme with deep V-shaped median incision, lateral arms truncated apically, subequal in length to posterior immovable apodeme ( Figs 12, 14 ). Posterior immovable apodeme basally narrow, truncated at broadened apex ( Fig. 14 ). Anterior immovable apodeme narrow, round at outer margin in dorsal view ( Fig. 14 ). Aedeagus thick, almost same thickness throughout, apex terminating with pair of slender lateral spines and median rod; aedeagus less than 2.0 × as long as semen pump ( Figs 13, 15 ).

Female

Unknown.

Remarks

Tipula (V.) cibagouensis sp. nov. is considered here as a member of the T. (V.) subtincta species group, which was proposed by Savchenko (1964), with a list of species revised by Starkevich (2012) and following the discussion in Pilipenko & Strakevich (2020). The nearest allies are T. (V.) wahlgrenana Alexander, 1968 ( India) , T. (V.) exechostyla Alexander, 1964 ( India) and T. (V.) gandharva Alexander, 1951 ( India, Myanmar) based on the shape of the male hypopygium. All species are characterized by their the dorsal portion of tergite nine having a pair of lobes at posterior border and elongated bladeshaped dorsal lobes of A9S. The new species can easily be separated from T. (V.) wahlgrenana by a brown flagellum, which is bicolored in the latter ( Starkevich & Podenas 2014: figs 1–3). In addition, T. (V.) wahlgrenana has two acute, blackened spines on the gonocoxite and dorsal lobe of A9S with a black apex while the new species is characterized by a single spine on the gonocoxite and a yellow apex of dorsal lobe of A9S. Tipula (V.) exechostyla can be separated by the gonocoxite ventromesally extended into a long acute black spine, clasper of gonostylus bearing conspicuous blackened lobe ( Alexander 1964: pl. 6 fig. 49) while the new species is characterized by a gonocoxite with an apically situated, not blackened spine and a clasper of the gonostylus dorsally with an obtuse angle, without blackened lobe. Tipula (V.) gandharva can be separated by a femur having a yellow subterminal ring, the gonocoxite terminating into a short stout spine ( Alexander 1953: fig. 8c) while the new species bears a femur without subterminal ring and a gonocoxite having a long spine.

Figures

Figs1–5. Tipula (Vestiplex) cibagouensis sp. nov.,♂, holotype (coll. Inse-XZ3768). 1. Head, dorsal view. 2. Thorax, dorsal view. 3. Thorax, lateral view. 4. Wing. 5. Abdomen, lateral view. Scale bars = 1.0 mm.

Figs 6–15. Tipula (Vestiplex) cibagouensis sp. nov., ♂, holotype (coll. Inse-XZ3768). 6. Hypopygium, dorsal view. 7. Tergite nine, ventral view. 8. Hypopygium, lateral view. 9. Hypopygium, ventral view. 10. Left lobe and clasper of gonostylus, lateral view. 11. Dorsal lobe of A9S. 12. Ejaculatory apodeme of semen pump. 13. Semen pump, lateral view. 14. Semen pump, dorsal view. 15. Apex of aedeagus. Abbreviations: see Material and methods. Scale bars: 6–11 = 0.5 mm; 12–14 = 0.6 mm; 15 = 0.25.