Limnophila (Limnophila) pictipennis ( Meigen, 1818 )

Podenas, Sigitas & Byun, Sun-Jae Park and Hye-Woo, 2022, Limnophila crane flies (Diptera: Limoniidae) of Korea, Journal of Species Research 11 (2), pp. 117-127 : 122-124

Limnophila (Limnophila) pictipennis ( Meigen, 1818)

Limnobia pictipennis Meigen, 1818: 119 , 120.

Limnophila angustipennis Meigen, 1818: 120 .

Poecilostola pictipennis Schiner, 1864: 552 ; Meijere, 1921: 62; Pierre, 1924: 120; Nielsen, 1925: 71; Czižek, 1931: 127, 129.

Poecilostola angustipennis Schiner, 1864: 552 ; Meijere, 1921: 62; Pierre1924: 120; Nielsen, 1925: 71; Czižek, 1931: 130.

Limnophila pictipennis Macquart, 1834: 95 ; Edwards, 1938: 85; Coe, 1950: 42; Savchenko, 1986: 272, 273.

Limnophila (Limnophila) pictipennis Savchenko, 1983: 54 ; 1989: 92.

General. Body coloration dark brown densely dusted with gray. Male body length 9.7-12.0 mm, female 12.8- 14.7 mm, male wing length 11.5-12.5 mm, female 11.5- 13.5 mm.

Head ( Fig. 2C ): Gray, light gray along eye margin, brown dorsally, narrowly reddish-brown at base, sparsely covered with dark brown erect setae. Vertex with low wide tubercle marked with median dark line. Eyes widely separated in both sexes, distance between them at base of antenna approximately equals to length of scape. Antenna ( Fig. 2A ) 1.9-2.0 mm long in male, 2.1-2.2 mm in female, reaching slightly beyond frontal margin of prescutum if bent backwards. Antennal scape long cylindrical, dark brown, three times as long as succeeding segment, densely dusted with brownish gray and bearing few short semi-erect brown setae. Pedicel dark brown, dusted with gray, widened distally. Four basal flagellomeres brown, yellowish at base, strongly dilated ventrally. Remaining flagellomeres elongate, brown to dark brown. All flagellomeres at basal half of flagellum covered with dense whitish pubescence. Verticils dark brown, longest three times as long as respective segments. Apical segment approximately as long as preceding segment. Rostrum dark brown, densely covered with brownish gray pruinosity, few long setae dorso-apically and ventrally. Palpus brown, mouth- parts brown.

Thorax: Cervical sclerites dark brown laterally and ventrally, light brown dorsally at base of head, densely dusted with gray. Pronotum large, gray with brown median line and less distinct lateral longitudinal spot. Mesonotal prescutum gray with four indistinct darker brown longitudinal stripes ( Fig. 2C ). Median stripes usually separated by narrow gray line. Tubercular pits small but distinct, at frontal margin of sclerite, pseudosutural fovea distinct, brown, indistinct transverse brown spot beyond fovea. Scutal lobe light gray with two indistinct brownish spots. Area between scutal spots light gray. Scutellum light gray with dark brown median line. Mediotergite light gray, brownish posteriorly. Dorsopleural membrane brown, dusted with gray. Pleuron light gray, sparsely variegated with darker areas where the bloom has been denuded, katepisternum bare, setosless. Wing ( Fig. 2B ) iridescent with brownish tinge and abundant spots covering whole wing area: four large spots at frontal margin, at arculus, at middle between arculus and base of Rs, at both ends of radial sector; cross-veins and distal parts of all longitudinal veins surrounded by darker; remainder of wing surface and along veins with abundant small spots. Stigma dark brown with small yellowish spot at middle. Veins brown, yellowish at wing base. Venation: Sc long, nearly reaching branching point of Rs, sc-r beyond tip of Sc, at branching point of radial sector. Rs long, arched and sometimes short-spurred at base. Free end of R 1 twice as long as R 2. R 3 and R 4 slightly diverging towards wing margin, cell r 3 with very short stem or making point-contact with base of R 5. Cross-vein r-m distinct, at base of discal cell. Discal cell 1.8 times as long as wide. Cell m 1 long, stem slightly shorter than cell itself. Cross-vein m-cu at middle length of discal cell. Anal vein long, distinctly arched at wing margin, apex at the level of Rs base or slightly beyond. Anal angle long and narrow, widely rounded. Length of male halter 1.5-1.9 mm, that of female 1.9-2.0 mm, stem brown, dusted with gray, with row of erect long setae before middle, knob dark brown, grayish pruinose. Coxae brown, dusted with gray bearing few long rusty-brown setae apically. Trochanters brownish yellow marked with black ventrally, sparsely dusted with gray. Femur and tibia yellow with dark brown apical ring. Basal tarsomere brown with yellowish base and dark brown apex, remaining tarsomeres dark brown. Tibia of foreleg with single apical spur, tibiae of middle and hind pairs of legs with two apical spurs each. Male femur I: 6.5-7.5 mm long, II: 7.5-7.6 mm, III: 7.8-8.5 mm, tibia I: 8.0- 8.8 mm, II: 8.8-9.0 mm, III: 8.5-10.0 mm, tarsus I: 7.7-8.8 mm, II: 7.1-7.3 mm, III: 6.1-6.7 mm. Female femur I: 6.0- 7.7 mm long, II: 6.0- 7.5 mm, III: 7.0- 8.5 mm, tibia I: 6.0- 8.1 mm, II: 6.5-8.0 mm, III: 9.3-10.0 mm, tarsus I: 7.5-7.6 mm, II: 5.2-6.5 mm, III: 5.6-6.5 mm. Claw simple, spineless, dark brown.

Abdomen: Abdominal tergites grayish brown, narrowly grayish-light brown laterally, sparsely setose. Basal tergite gray, second and third tergites yellowish. Tergal sclerite with pair of transverse sutures. Sternites bluish-grayish brown, yellowish before middle of abdomen. Male terminalia ( Fig. 2D ) brownish-yellow to rusty-brownish-yellow depending on specimen. Ninth tergite distinctly wider than longer, posterior margin slightly extended medially. Gonocoxite slightly elongate, with distinct fleshy knobshaped apical lobe at base of outer gonostylus. Outer gonostylus setose, narrow at basal half, dilated distally, apex rounded and slightly darkened. Inner gonostylus wide, fleshy and setose, narrowing towards apex, distal part slightly extended and arched, blunt-apexed. Paramere long rod-shaped, strongly curved medially. Aedeagus long, strongly arched, apex curved downwards. Ovipositor ( Fig. 2E ) brownish yellow. Tenth tergite elongate, yellow with darkened distal part, cercus long and arched, darker at base, yellow at tip, round-apexed. Hypovalva long and straight.

Elevation range in Korea. From 900 to slightly above 1,500 m.

Period of activity in Korea. From early June through middle of July.

Habitat. Muddy margins of springs and small streams covered with shrubs and dense grassy vegetation.

General distribution. East and West Palearctic.

Examined material ( Fig. 4B ). 4 males, 2 females (pinned), North Korea, Chonsani Paiktusan , alt. 3,200 ft. [975 m], 1937.07.12, A. Yankovsky ( USNM) ; 2 males, 2 females (pinned), North Korea, Chonsani Paiktusan , alt. 3,400 ft. [1,036 m], 1937.07.15, A. Yankovsky ( USNM) ; 1 male (pinned), North Korea, Chonsani , alt. 5,000 ft. [1,524 m], 1940.06.02, A. Yankovsky ( USNM) ; 2 males (pinned), North Korea, Chonsani , alt. 3,000 ft. [914 m], 1940.06.22, A. Yankovsky ( USNM) . Also compared with : 1 male, 1 female (pinned) Lithuania, Jurbarkas , N55.08077, E22.75132, alt. 18 m, 1989.05.09, S. Podenas (VU) ; 1 female (in ethanol), Lithuania, Birzai distr., Gojelis , N56.21197, E24.68720, alt. 58 m, 1993.08.16, S. Podenas (VU) ; 1 male (pinned), Lithuania, Kaisiadorys, Girele forest , N54.85037, E24.42522, alt. 96 m, 1994.08.23, V. Dobrovolskyte (VU) ; 1 male (in ethanol), Lithuania, Vilnius distr., Suderve , N54.78667, E25.08630, alt. 174 m, 1995.06.11, S. Podenas (VU) .

Figures

Fig. 2. Limnophila (Limnophila) pictipennis Meigen, 1818. A. antenna. B. wing. C. thorax and head, dorsal view. D. male genitalia, dorsal view. E. ovipositor, lateral view. Scale bars 0.5mm.

Fig. 4. Distribution maps of Korean Limnophila(Limnophila) crane flies.A. L. (L.) japonica. B. L. (L.) pictipennis. C. L.(L.) politostriata.