Dicranoptycha prolongata Alexander, 1938

Podenas, Sigitas & Byun, Hye-Woo, 2014, New Limoniinae crane flies (Diptera: Limoniidae) of Korea, Journal of Species Research 3 (2), pp. 167-182 : 173-175

Dicranoptycha prolongata Alexander, 1938

Alexander, 1938: 139; Savchenko, 1983: 94.

General coloration rusty brown. @ody length of male 6.1 to 8.2 mm, female 7.0- 8.3 mm. Wing length of male 8.5 to 9.9 mm, female 8.1-9.7 mm.

Head opaque grayish brown, posterior margin turning into brown. Dorsal part of head covered with scarse long erect brown setae. Length of male antennae 1.25-2.00 mm, that of female 1.24-1.70 mm. Scape cylindrical, yellow. Pedicel widening distally, obscure yellow. Flagellum 14-segmented, basal flagellomere with yellow basal half and brown distal. Remaining flagellomeres brown to dark brown. @asal segments oval, distal segments elongate, nearly cylindrical. Apical flagellomere elongate, slightly exceeding in length penultimate. Verticils long, brown, 1.5-2 times exceeding length of respective segments. Short pubescence, covering segments is dense on ventral side and very scarse on dorsal side of flagellum. Rostrum brown, covered with scarce grayish pruinosity. Palpus brown basally, turning blackish distally.

Thorax generally rusty brown. Pronotum light brown to brown, frontally with remains of dark median line. Mesonotal prescutum reddish brown with indistinct three brown longitudinal stripes. Lateral stripes extend onto scutum, main ground color of which is light brown. Scutellum testaceous. Mediotergite light brown, covered with rather dense gray pruinosity. Pleura reddish brown, covered with rather dense gray pruinosity. Ventral part of katepisternum infuscated. Wing ( Fig. 3A ) tinged with brown. Stigma very pale and indistinct. Costal cell yellowish. Darker seams at origin of Rs, along cord and distal end of discal cell, very weak and nearly missing in some specimens. Venation: Sc 1 reaching distinctly beyond branching point of Rs, Sc 2 close to Sc 1 tip. Rs angulated and short spurred at base in some specimens, arched in other. R 3 and R 4 long and parallel to each other and both distinctly arched at wing margin. Discal cell long and narrow, about three times as long as wide. @asal deflection of CuA 1 distinctly beyond branching point of M, about at one-fourth of discal cell’s length. @oth anal veins long and very slightly sinuous. Anal angle medium-sized, comparatively narrow. Length of male haltere 1.15-1.80 mm, that of female 1.10-1.35 mm. Stem of haltere pale yellow, knob slightly infuscated apically. Coxae yellow, covered with gray pubescence. Trochanters yellow, with dark brown distal rim. Femur light brown with base obscure yellow and narrowly darkened distal end. Tibiae light brown with both ends narrowly darkened. Tarsi obscure yellow at base passing into brown distally. Male femur I: 4.9-7.0 mm long, II: 5.8-7.3 mm, III: 6.3-7.7 mm; tibiae I: 6.5-8.8 mm, II: 6.4-7.7 mm, III: 7.0- 8.2 mm; tarsus I: 5.9-7.8 mm, II: 6.0- 7.4 mm, III: 6.0- 7.1 mm long. Female femur I: 4.9-5.2 mm long, II: 5.0- 6.2 mm, III: 5.3- 6.4 mm; tibiae I: 6.0- 6.4 mm, II: 4.7-6.2 mm, III: 5.1-7.0 mm; tarsus I: 5.0- 5.5 mm, II: 4.2-5.0 mm, III: 4.4-5.1 mm

long. Claw simple, without additional spines.

@asal abdominal tergite grayish yellow, tergites 2-4 obscure yellow with distinct dark lateral stripes. Fifth tergite yellow at base and dark brown distal part. Subterminal tergites dark brown with lighter posterior margin. Tergites covered with sparse yellowish setae. @asal sternites grayish yellow, further sternites yellow with distinct dark brown lateral stripes, subterminal sternites brown with grayish caudal margins and somewhat lighter central parts. Male genitalia ( Fig. 3 @) reddish brown, covered with long erect yellow setae. Ninth tergite ( Fig. 3C ) simple, with slightly concave posterior margin, covered with dense setae. Lateral arms, mentioned in original description, are missing, two median, triangle-shaped lobes, drawn by Alexander (1938, Fig. 30) are also missing. Gonocoxite simple, nearly cylindrical, outer margin at base turned outwards. Outer gonostylus distinctly wider, than in original description, with blackened, gently curved apical part, produced into spine. Distal end of outer gonostylus with small serration on both margins. Inner gonostylus wide and fleshy, with blunt apex and covered with sparce setae. Interbase long and blunt-apexed (most probably, it was missinterpreted as lateral tergal arm by Alexander (1938)). Aedeagus short and wide, two-apexed. Ovipositor ( Fig. 3D ) dark brown dorsally, turning yellow ventrally and distally. Cercus fleshy, setose, with wide-rounded apex. Hypovalvae wide, setose, reaching to about one-third of cercus. Dorsal margin of hypovalvae with ten strong setae, tips of which are turn- ed caudally.

Elevation range in Korea. Specimens are known to occur at altitudes from 100 m to nearly 2 km.

Period of activity. Adults are flying through September and October in Korea.

Habitat. According to Savchenko (1983), adults are found in grassy vegetation in very diferent forests, but prevailing in dryer forests.

General distribution. Species is known from Far East of Russia (Primorye) ( Savchenko, 1983) and North Korea ( Alexander, 1938).

Examined materials ( Fig. 7C ): Paratypes: 1@, 1, on same pin, Ompo , Corea, 850’, Oct. 19. 37, Yankovsky ; 1@, 1, on same pin, Ompo , Corea, 800’, IX -13. 37, Yankovsky ; 2@@ on same pin, Ompo , Corea, 800’, IX-13. 37, Yankovsky ; 1, Ompo , Corea, 850’, Oct. 19. 37, Yankovsky ; 3@@ on same pin, Seren Mts. , Corea, 2- 3500’, X-10. 37, Yankovsky ; 2@@ on same pin, Ompo , Corea, 1750’, IX-23. 37, Yankovsky ; 1, 1 sex unclear, on same pin, Seren Mts. , Corea, 2500-3000’, X-15. 37, Yankovsky ; 2 on same pin, Ompo , Corea, 1750’, IX-23. 37, Yankovsky ; 2 specimens, sex unclear, on same pin, Ompo , Corea, 1600’, X-27. 37, Yankovsky ; 2@@ on same pin, Ompo , Corea, 1500’, IX-30. 37, Yankovsky ; 1@, 1, on same pin, Seren Mts. , Corea, 2500-3000’, X-15. 37, Yankovsky. Non-type material identified by S. Podenas: 1@, Seren Mts. , Corea, 5-6000’, X-3. 37, Yankovsky ; 1 [Corea], wing and leg on slide, Kongô-san (Kôgen-dô), 7.IX.1931, C. Takeya; 1@, 1, on same pin, 1 male on separate pin, Ompo , Corea, 1200’, X-7. 37, Yankovsky ; 1@, Seren , Corea, 4000’, X-9. 37, Yankovsky ; 1@, Ompo , Corea, 800’, IX-22. 37, Yankovsky ; 1@, 1 specimen with unclear sex, on same pin, Ompo , Corea, 1200’, Oct.-7. 37, Yankovsky ; 1@, North Korea, Ompo , 350’, IX-7. 38, Yankovsky ; 1@, 1, N. Korea, Pontani Paiktusan , 6350 ft., VIII-1. 1940; 1, (preserved in ethanol), S. Korea, Nodong-ri, Yongpyeong-myeon, Pyeongchang-gun, Gangwon-do, Mt. Gyebangsan, [approximate coordinates: N37.697736, E128.476243], 2008. X.03, malaise trap, coll. K. G. Kim; 1, (preserved in ethanol), S. Korea, Jangjeon-ri, Jinbu-myeon, Pyeongchang-gun, Gangwon-do, Mt. Gariwangsan, 37.4877778N, 128.5452778E, 2009.VII.05-IX.02, malaise trap, collect- ed by W.Y. Choi et al .

Previous records for Korea: Holotype: 1@, North Korea, Ompo, altitude 800 feet, September 13, 1937, coll. M. Yankovsky and type series, listed above (Alexan- der, 1938).

Figures

Fig. 3. Dicranoptycha prolongata. A. wing. @. male genitalia, ventral view. C. ninth tergite of male genitalia. D. ovipositor, lateral view.

Fig. 7. Distribution maps of Korean Limoniinae crane flies. A. Achyrolimonia neonebulosa. @. Dicranoptycha diacantha. C. Dicranoptycha prolongata. D. Helius (Helius) gracillimus. E. Helius (H.) obliteratus. F. Helius (H.) polionotus.