Dicranoptycha buksubaeksaniana, Podenas, Sigitas, Byun, Hye-Woo & Kim, Sam-Kyu, 2015

Podenas, Sigitas, Byun, Hye-Woo & Kim, Sam-Kyu, 2015, New Dicranoptycha Osten Sacken, 1859 Crane flies (Diptera: Limoniidae) of North and South Korea, Zootaxa 3925 (2), pp. 257-270 : 265-268

Dicranoptycha buksubaeksaniana sp. nov.

( Figs. 10–13 )

Etymology. This species is named after the name of the mountain, where it was collected.

Material examined ( Fig. 16 A). Type specimens 3 males, 2 females.

Holotype, male (pinned). NORTH KOREA, Kankyo Nando, Puksu Pyaksan, alt. 5500 [feet], VII-27.1939, A. Yankovsky, [now that district is Yanggang-do, mountain Buksubaeksan], ( USNM).

Paratypes: 1 female (pinned), same locality as holotype, alt. 6000 feet, VII-14, 1939, A. Yankovsky, ( USNM); 1 female, same locality, alt. 5500 feet, VIII-14, 1939, A. Yankovsky, ( USNM); 2 males, SOUTH KOREA, Gyeonggi-do, Gapyeong-gun, Buk-myeon, Hwaak-ri, N 37.99363, E 127.52102, alt. 810 m, 2014.08.20, coll. S. Podenas, ( NIBR).

Species was also compared with holotype of Dicranoptycha vulpes Alexander, 1935 , ( USNM) and specimens of D. venosa Alexander, 1924 : holotype: male (pinned), [ Japan], Shikaripetsu, Hokkaido, VIII-26.1922, Teiso Esaki, ( USNM) and dry specimens from Far East of Russia: 2 females, Kunashir Island, settlement Mendeleyevo [approximate coordinates: N 43.95833, E 145.6830556], 1989. VIII.02, (VU); 3 females, Kunashir Island, settlement Mendeleyevo, 1989. VIII.03–04, (VU); 1 male, 2 females, Kunashir Island, cape Lechebnyj, 1989. VIII.04, (VU); 2 males, 1 female, Kunashir Island, settlement Mendeleyevo, 1989. VIII.06, (VU); 1 male, 2 females, Kunashir Island, South Kurilsk, 1989.VIII, (VU).

Diagnosis. Distinguished from other species in the genus by the structure of the male genitalia and body coloration. Thorax light gray, abdomen brown dorsally, yellow ventrally. Male genitalia ( Fig. 11 ) with outer gonostylus sclerotised, long and narrow with point-apexed tip, reddish brown, with smooth both edges. Inner gonostylus shorter than outer gonostylus. Anterior apodemes forming a single mesal apodeme, that resembles fish tail.

Description. Adult, male (N =3) ( Figs. 10, 11 ). General color of thorax light gray, abdomen light brown. Body length 6.2–8.7 mm, wing length 9.2–11.8 mm. Head: grayish brown, sparsely pruinose, covered with sparse, semierect, brown setae. Antenna 1.8–2.0 mm long. Scape elongate, cylindrical, brown, covered with dense gray pruinosity. Pedicel short, widened distally, dark brown, covered with scarce grayish pruinosity. Flagellum 14–segmented, generally dark brown, four-five basal flagellomeres with yellowish bases and dark brown distal parts. Flagellomeres elongate, wider at base, narrower at distal end, just two apical segments nearly cylindrical and both approximately equal in length. Verticils dark brown, approximately 1.5 times as long as respective segments. Rostrum, palpus and mouth parts brown, covered with grayish pruinosity. Thorax: generally light gray because of dense pruinosity, which covers brown color of sclerites. Pronotum light brown, covered with gray pruinosity. Main color of mesonotal prescutum light gray. Prescutum with four dark brown, blurred longitudinal stripes. Median stripes separated longitudinally by narrow line of gray. Pseudosutural fovea distinctly dark brown. Scutal lobe brownish gray; frontal and central part brown with less dense pruinosity, lateral margin light gray. Scutellum light brown, covered with dense pruinosity. Mediotergite brown, covered with dense pruinosity. Pleuron uniformly light gray except ventral part of katepisternum, which is grayish-brown. Wing ( Fig. 10 ) uniformly tinged with brownish gray, except yellow subcostal cell. Stigma indistinct, not darker than remaining wing area. Most veins are grayish, veins at wing base and in costal area brownish. Venation: Sc1 long, reaching slightly beyond branching point of Rs, Sc2 close to Sc1 tip. Rs medium-long, arched at base. R3 and R4 long and parallel to each other and both distinctly arched before wing margin, thus cell r1+2 very wide at wing margin. Discal cell long and narrow, about 2.7 times as long as wide. Basal deflection of CuA1 distinctly beyond branching point of M, approximately at one-fourth of discal cell‘s length. Both anal veins long and nearly straight. Anal angle medium-sized, posterior margin widely rounded. Halter 1.2–1.7 mm long, pale, just very base slightly infuscated with brown. Coxae brownish yellow, basal parts slightly darkened, grayish. Darkening is more intense on fore and less distinct on posterior coxae. Trochanters brownish yellow. Femur and tibiae yellow with narrowly darkened distal ends, basal tarsomere light brown with darkened distal end, remaining tarsomeres brown. Legs covered with rather long, semi-erect, brown setae. Length of femur I: 7.0 mm, III: 7.4 mm, tibiae III: 7.6 mm. Claw with narrow subbasal spine. Abdomen: generally light brown. Basal and distal tergites darkened. Lateral and medial stripes missing, posterior margins of tergites grayish. Sternites yellow, basal sternite brown, covered with gray pruinosity. Abdomen covered with short, erect, sparse, golden-yellow setae. Male genitalia ( Fig. 11 ) with widely concave ninth tergite. Gonocoxite simple, elongate-oval. Outer gonostylus sclerotised, reddish brown, nearly straight with point-apexed distal part. Inner gonostylus shorter than outer gonostylus, wide and fleshy, with blunt apex and covered with sparce setae. Lateral process of lateral apodeme of vesica is straight, narrowed distally and point-apexed. Anterior apodemes of vesica are connected at base, but widely separated distally. They form characteristic fish-tail structure.

Female (N =2) ( Figs. 12, 13 ). Body length 8.6–10.2 mm, wing length 9.4–10.0 mm. Head: coloration similar to that of male. Antenna 1.63 mm long, scape brown with grayish base, pedicel yellowish, first flagellomere yellowish at base, dark brown at distal part, succeeding flagellomeres dark brown. Thorax: same color as in male. Length of halter 1.5 mm. Femur I: 6.1 mm, II: 6.5 mm, III: 6.9 mm, tibiae I: 7.2 mm, II: 6.7 mm, III: 8.0 mm, tarsus I: 6.3 mm, II: 5.0 mm, III: 6.2 mm long. Abdomen: tergites yellowish brown. Posterior margins narrowly grayish. Sternites yellow. Distal segments darkened, grayish brown. Ninth and tenth tergites and eigth sternite grayish brown. Ovipositor ( Figs. 12, 13 ) with cerci brownish yellow and hypovalvae grayish yellow. Cercus elongate, fleshy and setose. It is blunt apexed and with widely rounded ventral margin. Dorsal part of cercus brownish, ventral yellow. Hypovalve long and straight. Dorsal margin nearly straight. It is wide and turned inwards, thus long setae, which are usual for most Dicranoptycha , aren‘t visible in lateral view ( Fig. 13 ). They are visible in dorsal view of hypovalvae or in ventral view of KOH cleared ovipositor ( Fig. 12 ). Tip of hypovalvae reaches approximately to the middle of cercus.

Elevation. Adults were collected at altitudes from 800 to 1850 m.

Period of activity. Adults are flying from middle of July through second half of August.

Distribution. Northern part of North Korea, Buksubaeksan mountain and the northern part of South Korea, environs of Chuncheon.

Habitat ( Fig. 15 ). Rocky slopes of medium-sized stream covered with deciduous trees and shrubs. Grassy vegetation nearly missing. Uppermost layer of soil covered with wood debris and leaf litter.

Figures

FIGURE 15. Habitat of Dicranoptycha buksubaeksaniana n. sp. South Korea, Gyeonggi-do, Gapyeong-gun, Buk-myeon, Hwaak-ri.

FIGURE 16. Distribution maps. A, Dicranoptycha buksubaeksaniana n. sp. B, Dicranoptycha gyebangsaniana n. sp.

FIGURES 10 – 13. Dicranoptycha buksubaeksaniana n. sp. 10, wing of female. 11, male genitalia of holotype, dorsal view. 12, ventral view of KOH cleared paratype ovipositor. 13, ovipositor of paratype, lateral view.