Dicranoptycha venosa Alexander, 1924a

Podenas, Sigitas, Park, Sun-Jae, Byun, Hye-Woo, Kim, A-Young, Klein, Terry A. & Aukštikalnienė, Heung-Chul Kim and Rasa, 2020, New data on Limoniinae and Limnophilinae crane flies (Diptera: Limoniidae) of Korea, Journal of Species Research 9 (4), pp. 492-531 : 497-498

Dicranoptycha venosa Alexander, 1924a

Dicranoptycha venosa Alexander, 1924a: 561 ; Savchenko,

Krivolutskaya, 1976: 117.

General: Thorax dark gray, abdomen dark brown. Body length of male 10.0 mm, wing length 10.5 mm.

Head: Dark gray, pruinose. Vertex wide. Male antenna 1.8 mm long. Scape cylindrical, dark brown at base, turning yellowish brown towards distal end. Pedicel widening distally, obscure yellow. Flagellum 14-segmented ( Fig. 2A ), basal flagellomere widely yellow at base, brown at distal end. Second flagellomere narrowly yellowish at base, remainder brown. Third segment brown, indistinctly yellowish at base. Remainder of flagellum brown to dark brown. Basal flagellomere elongate, narrowed at base. Second to fifth segments short, nearly cylindrical, remaining segments spindle shaped, getting longer towards distal end of antenna. Apical flagellomere elongate, approximately as long as penultimate. Verticils short, twice as short as length of respective segment. Rostrum dark brown to black. Palpus short, black, covered with erect brown setae. Mouth parts pale brown.

Thorax: Generally dark gray. Mesonotal prescutum with four indistinct darker stripes. Scutellum and mediotergite concolorous with prescutum. Pleuron dark brownish gray, areas above second and third coxae indistinctly yellowish. Wing ( Fig. 2B ) yellowish to brownish, unpatterned. Stigma indistinct. Veins brown. Venation: Sc long, reaching beyond branching point of Rs, sc-r close to Sc tip. Rs long, slightly arched at base. R 3 and R 4 long and parallel to each other, slightly arched before wing margin. Discal cell long and narrow, three times as long as wide. Cross-vein m-cu distinctly beyond branching point of M, at about one-third of discal cell length. CuP nearly straight, anal vein slightly arched at apex. Anal lobe medium-wide. Halter 1.4 mm long, pale, knob slightly infuscate. Fore coxa dark brown, postero-ventral margin yellowish. Medial and posterior coxae obscure yellow. Trochanters yellow with dark brown distal rim, which do not extends onto dorsal surface. First femur dark brown with about the basal third yellow. Second and third femur yellow, distal end narrowly dark brown. Tibia brownish yellow, distal end narrowly darkened. Basal tarsomere brownish yellow, with dark brown distal end, remaining tarsomeres dark brown. Legs covered with short, semi-erect brown setae. Femur III and tibia III: 9.2 mm long.

Abdomen: Grayish brown with dark brown distal segments. Male terminalia ( Fig. 2C ) obscure yellow. Ninth tergite with widely concave and densely setose posterior margin. Gonocoxite simple, elongate-oval. Outer gonostylus sickle-shaped, wider at base, pointed at apex, posterior margin distinctly serrated. Inner gonostylus fleshy, wider at base, narrower at distal end, blunt-apexed and covered with sparse setae. Lateral process of lateral apodeme of vesica with distinctly arched distal part and small subbasal lobe. Aedeagus bifid at apex.

Elevation range in Korea: Species was found at about 225 m altitude.

Period of activity: Species was discovered at the end of May in Korea.

Habitats: Mixed grooves, pine with broad leaved deciduous trees, on slope of nearly dry mountainous stream. Species is attracted to light.

General distribution: Species is known from Sakhalin and Kuril Islands of the Russian Far East and Hokkaido Island, Japan. This is the first record from the continent.

Examined material ( Fig. 16B ): 1 male (in EtOH), S. Korea, Gyeonggi-do, Yangpyeong, Cheongun-myeon, Dowon-ri , N 37.54507, E 127.79483, alt. 224 m, 2017. 05.28, S. Podenas, at light ( NIBR) . Also compared with D. venosa specimens listed in Podenas et al., 2015 and specimens from Japan and the Russian Far East : 1 male (wing slide mounted), Japan, Maoka, Saghalien , 1922.07.28, Teiso Esaki ( USNM) ; 1 male (wing slide mounted), Japan, Shikotsu , Hokkaido, 1922.09.24, Teiso Esaki ( USNM) ; 1 male, 1 female (wings, legs and genitalia slide mounted), Saghalien, Ochiai , 1932.09.08, M. Hori ( USNM) ; 1 female (pinned), Akita Psn, Tamagawa , 500 m, 1951.06.18, Issiki-Ito ( USNM) ; 1 female, 1 specimen of unknown sex (broken abdomen) (pinned), Akita PW, Yuze , 250 m, 1951.06.22, Issiki-Ito ; 1 male (pinned), Alps, Nakabusa , 1951.07.24, Inove ( USNM) ; 1 female (pinned), N. Alps, Yoshikiya , 1951.07.28, Inove ( USNM) ; 4 females (pinned), N. Alps, Kamikochi , 1951.07.29, Inove ( USNM) .

Figures

Fig. 2. Dicranoptycha venosa Alexander, 1924, male.A. antenna. B. wing. C. male genitalia, dorsal view. Scale bars: 0.5mm.

Fig. 16. Distribution maps of Korean Limoniidae crane flies.A. Dicranomyia (Erostrata) submelas. B. Dicranoptycha venosa. C. Austrolimnophila(Archilimnophila) subunicoides. D. A.(A.) unica. E. A.(Austrolimnophila) asiatica. F. Conosia irrorata. G. Dicranophragma (Brachylimnophila) transitorium. H. D.(Dicranophragma) melaleucum melaleucum. I. Eloeophila persalsa. J. E. serenensis. K. E. subaprilina. L. E. ussuriana ussuriana. M. E. yezoensis. N. Paradelphomyia chosenica. O. P. macracantha.