Tipula (Vestiplex) coquillettiana 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) coquillettiana Alexander, 1924

Figs 1-10 , 11-15 , 86

Tipula coquillettiana Alexander 1924: 605; 1925: 91.

Tipula (Vestiplex) coquillettiana : Alexander 1934: 405; 1935: 118; Savchenko 1960: 172; 1964: 180; Oosterbroek and Theowald 1992: 154.

Type material examined.

Holotype, male, RUSSIA, Odasam [Southern Sakhalin], 5 August 1922, Esaki; paratype, male (USNM).

Other examined material

(Fig. 86 ). NORTH KOREA, 1 male, Seren Mts , alt. 3000 ft, 25 June 1938, Yankovsky (USNM) ; 2 males, alt. 3000 ft, 26 June 1938, Yankovsky (USNM); 2 males, alt. 3000-4000 ft, 29-30 June 1938, Yankovsky (USNM); 1 male, alt. 3500-5500 ft, 29-30 June 1938, Yankovsky (USNM); 3 males, alt. 4000-5000 ft, 29-30 June 1938, Yankovsky (USNM); 1 male, alt. 5000 ft, 29-30 June 1938, Yankovsky (USNM); 2 females, alt. 4000 ft, 30 June 1938, Yankovsky (USNM); 2 males, alt. 3500 ft, 5 July 1938, Yankovsky (USNM); 3 males, alt. 4500 ft, 5-6 July 1938, Yankovsky (USNM); 1 male, alt. 4000 ft, 10-11 July 1938, Yankovsky (USNM); 1 male, alt. 5500 ft, 18 July 1938, Yankovsky (USNM); 1 male, Kankyo Nando Puksu Pyaksan , alt. 6000 ft, 23 June 1939, Yankovsky (USNM) ; 1 male, alt. 6000 ft, 31 July 1939, Yankovsky (USNM); 1 male, alt. 5000 ft, 2 August 1939, Yankovsky (USNM); 2 males, Chonsani , alt. 4000 ft, 2 June 1940, Yankovsky (USNM) ; 1 male, alt. 3000 ft, 8 June 1940, Yankovsky (USNM); 4 males, alt. 4500 ft, 20 June 1940, Yankovsky (USNM); 1 male, alt. 4000 ft, 23 June 1940, Yankovsky (USNM).

Diagnosis.

Tipula (V.) coquillettiana can be easily recognized by the ninth tergite, which forms a narrow, saucer-shaped plate, and the horn-shaped gonocoxite. The tip of the gonocoxite is bifurcate. The female of this species has a gray, elongated abdomen and greatly reduced wing. The cercus is straight with its tip narrowed and the ventral margin and apical part of the dorsal margin distinctly serrated. The hypovalva is in the shape of an elongated filament.

Male.

Body length 17.1-21.3 mm, wing length 18.9-22.8 mm. General body coloration brownish yellow.

Head. Vertex and occiput gray with dark median line. Rostrum yellowish, thinly dusted with gray dorsally. Nasus distinct. Antenna 13-segmented, if bent backward extending beyond wing base. Scape and pedicel yellow; first flagellar segment basally yellow, distally brownish black; succeeding flagellar segments brownish black. Each flagellomere, except first, with basal enlargement and small incision. Apical flagellomere small, reduced. Verticils approximately as long as corresponding segments. Palpus with first segment yellowish, second brownish yellow, and other segment brownish black.

Thorax. Pronotum yellowish, thinly dusted with gray. Prescutum and presutural scutum gray; stripes bluish gray bordered by brown. Postsutural scutum, scutellum, and postnotum gray with bluish shade; all sclerites with dark, median line. Pleura brownish, dusted with gray. Coxa gray; trochanter yellowish; femur brownish yellow with tip broadly darkened; tibia brownish yellow; tarsal segments dark brown. Tarsal claw without tooth. Wing patterned with brown. Halter brownish yellow with brown knob.

Abdomen. Yellow. First abdominal segment dusted with gray. Abdominal segments 2 and 3 yellow, 4 and 5 brownish-yellow, and remaining segments dark brown. Lateral margin of tergites pale yellow. Dorsal median stripe pale, broadly interrupted.

Hypopygium. Brown (Fig. 1 ). Ninth tergite distally forming a narrow saucer-shaped plate (Figs 1 , 2 ). Tergal saucer posteriorly with broad median notch; lateral comer with serrated and blackened margin, provided with setae. Anterior margin elevated into narrow, blackened rim reaching lateral part of tergal saucer and terminating into acute projection. Gonocoxite apically extended, with tip split into blackened beak pointed caudad and rounded projection (Figs 1 , 3 ). Outer gonostylus slightly curved, finger-shaped with tip narrowed (Fig. 4 ). Inner gonostylus in the shape of a curved plate; beak blackened, triangular; dorsal margin claw-shaped; middorsal edge extended and serrated (Fig. 5 ). Gonocoxal fragment with flattened medial sclerites, fused into broad, nearly triangular base (Fig. 6 ). Lateral sclerite flattened and bilobed. Adminiculum boat-shaped, with tip and dorsal edge apically blackened (Fig. 7 ). Semen pump with flattened central vesicle (Figs 8 , 9 ). Compressor apodeme with round median incision, forming a 30° angle with posterior immovable apodeme. Posterior immovable apodeme much longer than compressor apodeme, flattened, rounded apically. Anterior immovable apodeme flattened, rounded. Intromittent organ tube-shaped, about twice as long as semen pump, brownish-black. Distal part with preapical yellow membrane, apex with pale median incision, lateral parts split, filament-shaped (Fig. 10 ).

Female. Body length 26.9-30.2 mm, wing length 4.7-5.7 mm. Generally similar to male, but with elongated and gray abdomen. Tergites and sternites with pale margins. Wing greatly reduced.

Female terminalia. Tenth tergite shining dark brown. Cercus brown, straight, as long as tenth tergite, with tip narrowed; ventral margin and apical part of dorsal margin distinctly serrated (Fig. 11 ). Hypovalva elongated and filamentous (Fig. 12 ). Median incision between hypovalvae deeper than posterior margin of eighth sternite. Lateral angle of eighth sternite sloping. Ninth sternite with lateral parts straight (Fig. 13 ). Furca anteriorly narrowed, shaped posteriorly as broad membranous plate (Fig. 13 ). Bursa copulatrix with spermathecal duct sclerotized at base, in shape of thickened, curved stick (Fig. 14 ). Spermatheca broadened at base, pear-shaped (Fig. 15 ).

Known distribution.

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

Figures

Figures 1 - 10. Male terminalia of T. (Vestiplex) coquillettiana 1 hypopygium, lateral view 2 ninth tergite, dorsal view 3 left gonocoxite, lateral view 4 left outer gonostylus 5 left inner gonostylus, lateral view 6 gonocoxal fragment, dorsal view 7 adminiculum, lateral view 8 semen pump, dorsal view 9 semen pump and intromittent organ, lateral view 10 distal part of intromittent organ, lateral view. Abbreviations: aia, anterior immovable apodeme; ca, compressor apodeme; gcx, gonocoxite; ig, inner gonostylus; ls, lateral sclerite of gonocoxal fragment; ms, medial sclerite of gonocoxal fragment; og, outer gonostylus; pia, posterior immovable apodeme; t 9, ninth tergite. Scale bars: 0.7 mm (1); 0.5 mm (2 - 9); 0.25 mm (10).

Figures 11 - 15. Female terminalia of T. (Vestiplex) coquillettiana 11 ovipositor, left lateral view 12 eighth sternite with hypovalvae, ventral view 13 ninth sternite with furca, dorsal view 14 Tipula bursa copulatrix, dorsal view 15 spermatheca, lateral view. Abbreviations: ap bc, anterior part of Tipula bursa copulatrix; bp sd, basal part of spermathecal duct; c, cerci; f, furca; h, hypovalvae; s 8, eighth sternite; s 9, ninth sternite; t 10, tenth tergite. Scale bars: 0.8 mm (11), 0.5 mm (12 - 14).

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.