Tipula (Vestiplex) verecunda Alexander, 1924

Starkevich, Pavel, Podėnas, Sigitas, Podėnienė, Virginija, Park, Sun-Jae & Kim, A-Young, 2021, Tipula (Vestiplex) crane flies (Diptera, Tipulidae) of Korea, ZooKeys 1061, pp. 23-55 : 23

Tipula (Vestiplex) verecunda Alexander, 1924

Figs 67-79 , 80-85 , 90

Tipula verecunda Alexander 1924: 606.

Tipula (Vestiplex) verecunda : Alexander 1935: 118; Savchenko 1964: 152; Oosterbroek and Theowald 1992: 160.

Type material examined.

Holotype, male, RUSSIA, [Sakhalin Island] Toyohara [Yuzhno-Sakhalinsk], July16, 1922, Esaki (USNM); paratypes, 3 males, 1 female, 13-14 July 1922, Esaki, topotypic (USNM); paratype, female, Shimizu [Southern Sakhalin], 27 July 1922, Esaki (USNM); paratype, female, Odasam [Southern Sakhalin], 31 July 1922, Esaki (USNM).

Other examined material

(Fig. 90 ). SOUTH KOREA, 5 males, 3 females, Jeju-do, Jeju Island, Seogwipo, Saekdal-dong , 33°21.45'N, 126°27.85'E, alt. 1100 m, 18 June 2019, H.-Y. Seo (NIBR) ; 6 males, Seogwipo, Saekdal-dong , 35°21.62'N, 126°27.76'E, alt. 1100 m, 18 June 2019, S. Podenas (NIBR) . CHINA, 1 male, Shaanxi, Qinling Mts, Hauzherza vill., 33°52.42'N, 107°48.77'E, alt. 1600 m, 2-3 June 2009, leg. Saldaitis & Floriani (NRC) .

Diagnosis.

Tipula (V.) verecunda can be easily recognized by the eighth sternite laterally having long setae and the ninth sternite being ventrally produced into a small tubercle. The ninth tergite has a U-shaped notch posteriorly, and anterior to the notch, the tergite is divided by a pale membrane. The ventral portion of the ninth tergite is yellow, with a pair of blackened narrow plates, and the gonocoxite is unarmed. The thorax is grey, with four darker grey stripes narrowly bordered by brown, and the wing is distinctly patterned with dark brown. The female can be recognized by the cercus having a smooth margin and a long, blade-shaped hypovalvae.

Male. Body length 17.4-21.6 mm, wing length 20.0-24.5 mm. General body coloration brownish yellow.

Head. Vertex and occiput ochraceous yellow, with dark median line. Rostrum dark brown, dorsally narrowly ochraceous yellow. Nasus distinct. Antenna 13-segmented, if bent backward extending beyond the wing base. Scape and pedicel yellow; flagellum brownish black. Each flagellomere, except for first one, with weak basal enlargement. Apical flagellomere small, reduced. Verticils longer than corresponding segments. Palpus dark brown.

Thorax. Pronotum ochraceous yellow, with dark median spot. Prescutum and presutural scutum grey, with four darker grey stripes, narrowly bordered by brown. Intermediate pair fused anteriorly. Interspace ochraceous light yellow. Postsutural scutal lobe with two ochraceous brownish yellow spots bordered by brown. Scutellum brown, with broad, dark brown median line. Postnotum brownish, with pale median line, and dusted with gray. Pleura yellowish. Wing distinctly patterned with dark brown. Halter pale, with brownish-black knob. Coxa yellowish; trochanter yellow; femur basally yellow, passing into brown towards dark brown tip. Tibia and tarsal segments brownish black. Tarsal claw with tooth.

Abdomen. Abdominal segments 1-4 yellow; segment 5 blackish, yellowish laterally; remaining segments black. Dorsal stripe on first tergite broad, on tergites 2-4 pale, on fifth tergite black. Lateral abdominal stripe distinct.

Hypopygium. Black (Fig. 67 ). Ninth tergite posteriorly with deep U-shaped notch, anteriorly to notch divided by pale membrane, dorsal portion dark brown, posterior margin provided with setae, additional short projection on either side of midline (Figs 68 , 69 ). Ventral portion yellow with a pair of blackened and microscopically serrated narrow plates; tip of plate pointed outward. Anal plate shaped as a small brown sclerite (Fig. 68 ). Gonocoxite unarmed, irregular in outline (Fig. 71 ). Outer gonostylus nearly oval, with basal part narrowed (Fig. 72 ). Inner gonostylus in the shape of rounded sclerite, terminating into a short upper beak with a small lower beak; beaks separated by round incision (Fig. 73 ). Dorsal crest with yellow setae and short, black spines grouped on dorsal surface, edge basally bent outward. Adminiculum nearly parallel-sided in ventral view, fused medially forming a distinct sclerite (Fig. 74 ). Basal part of adminiculum broadened and raised; apex funnel-shaped, with preapical incision in ventro-lateral view (Fig. 77 ). Ninth sternite ventrally produced into small tubercle (Figs 67 , 74 ). Appendage of ninth sternite with ventral lobe oblong, tip narrowed, surface with setae (Figs 74 , 76 ). Dorsal lobe in the shape of flattened, curved plate; tip on inner surface provided with setae (Figs 74 , 75 ). Eighth sternite posteriorly with pale median area; laterally provided with long setae reaching 1.1 mm long. Semen pump with central vesicle swollen (Figs 78 , 79 ). Compressor apodeme flattened forming a 50° angle with posterior immovable apodeme. Posterior immovable apodeme shorter than compressor apodeme, narrowed. Anterior immovable apodeme narrow. Intromittent organ tube-shaped, about three times as long as semen pump, basally and medially brownish yellow, passing into yellow towards acute apex.

Female. Body length 27.3-28.7 mm, wing length 23.0-24.5 mm. Generally similar to male. Thorax brown. Abdomen with distinct median stripe. Tergites and sternites with lateral margin pale.

Female terminalia. Tenth tergite basally shining brown but on other two-thirds shining black. Cercus reddish brown, nearly straight, with tip narrowed; ventral margin smooth (Fig. 80 ). Eighth sternite with hypovalva long, blade-shaped, basally with setae (Figs 80-82 ). Lateral angle of eighth sternite flattened and slightly extended. Ninth sternite with posterior half funnel-shaped, rounded apically (Fig. 83 ). Furca in the shape of a pale stripe narrowed anteriorly (Fig. 84 ). Spermatheca spherical (Fig. 85 ).

Known distribution.

Russia, Japan, and China ( Oosterbroek 2019). Recorded here for the first time from South Korea.

Figures

Figures 67 - 79. Male terminalia of T. (Vestiplex) verecunda 67 hypopygium, lateral view 68 ninth tergite, dorsal view 69 ninth tergite, caudal view 70 eighth sternite, lateral view 71 left gonocoxite, lateral view 72 left outer gonostylus 73 left inner gonostylus, lateral view 74 ninth sternite, ventral view (ninth tergite, outer and inner gonostyles removed) 75 right dorsal lobe of appendage of ninth sternite 76 right ventral lobe of appendage of ninth sternite 77 adminiculum, lateral view 78 semen pump, dorsal view 79 semen pump and intromittent organ, lateral view. Abbreviations: adm, adminiculum; ap, anal plate; dl, dorsal lobe of appendage of ninth sternite; dp, dorsal portion of ninth tergite; gcx, gonocoxite; gcx, gonocoxite; ig, inner gonostylus; og, outer gonostylus; s 8, eighth sternite; vl, ventral lobe of appendage of ninth sternite; vp, ventral portion of ninth tergite; vt, ventral tubercle of ninth sternite. Scale bars: 0.8 mm (67); 0.5 mm (68 - 79).

Figures 80 - 85. Female terminalia of T. (Vestiplex) verecunda 80 ovipositor, left lateral view 81 eighth sternite with hypovalvae, ventral view 82 distal part of eighth sternite with hypovalvae, ventral view 83 ninth sternite, dorsal view 84 furca, dorsal view 85 spermatheca, dorsal view. Scale bars: 0.7 mm (80, 82); 0.5 mm (81, 83 - 85).

Figures 86 - 90. Collecting sites of T. (Vestiplex) in Korean Peninsula 86 T. (V.) coquillettiana 87 T. (V.) kuwayamai 88 T. (V.) serricauda 89 T. (V.) tchukchi 90 T. (V.) verecunda.