Libnotes (Laosa) charmosyne ( Alexander, 1958 )

Podenas, Sigitas & Byun, Hye-Woo, 2018, Libnotes crane flies (Diptera: Limoniidae) from Jeju Island (South Korea), Zootaxa 4483 (2), pp. 375-384 : 377-379

Libnotes (Laosa) charmosyne ( Alexander, 1958)

( Figs. 1–3 )

Limonia (Libnotes) charmosyne Alexander, 1958: 3 .

Examined material: holotype, male (antenna, fore leg and wing slide-mounted), Japan, Shikoku, Mt. Ishizuchi, altitude 1800 m, June 16, 1956, T. Yano ( USNM); 1 male ( Fig. 1 ) (pinned, wing slide-mounted ( Fig. 2 ), terminalia ( Fig. 3 ) in microvial with glycerol on same pin), S. Korea, #30, Cheju [Jeju] Island, September 6, 1954, G. W. Byers ( USNM).

General body coloration dark grayish brown ( Fig. 1 ). Male body length 10.0 mm, wing length 14.9 mm.

Head. Dark brownish gray. Eyes big, thus anterior vertex narrow. Original description ( Alexander, 1958) mentioned anterior vertex carinate, but the author thought that “this possibly abnormal and caused by shrinkage”. Anterior vertex of Korean specimen carinate too. Antenna dark brown. Scape elongate, cylindrical. Pedicel subglobular, more than three times as short as scape, base narrowly pale. Basal flagellomeres subglobular with very short verticils. Rostrum and palpus blackish dark brown, labella pale.

Thorax. Cervical sclerites and pronotum dark brown dusted with gray. Mesonotal prescutum grayish dark brown with indistinct median stripe. Area around pseudosutural fovea and lateral margin of sclerite yellowish. Scutal lobe dark brown, area between lobes silvery gray because of pruinosity. Scutellum and mediotergite dark brown, densely dusted by gray. Pleuron grayish dark brown, semi-polished. Wing ( Fig. 2 ) subhyaline, iridescent, grayish, yellow at base and in costal area, with darkened areas around all cross-veins. The most distinct, but small spots at base of Rs, at tips of Sc1 / Sc2 and R1. Stigma dark brown. Veins brown, yellow in prearcular and costal areas. Venation: Sc long, Sc1 ending far beyond branching of Rs. Sc2 at tip of Sc1. Rs very short, slightly arched. R1 short transverse. R2 distinctly before tip of R1, cells r3 and r5 with additional cross vein each, radial and medial veins distinctly arched before wing margin. Cross-vein r-m at base of discal cell. Discal cell elongate, about five times as long as wide. Free end of M1+2 twice as long as its basal part, that makes frontal margin of discal cell. Basal deflection of CuA1 its own length beyond base of discal cell. First anal vein straight, second slightly sinuous. Cell a2 medium wide, anal angle widely rounded. Stem of halter pale with brownish yellow base, knob light yellowish brown with infuscated base. Length of male halter 1.8 mm. Coxae dark brown, narrowly yellowish ventrally. Trochanters obscure yellow. Fore and middle femora brownish black to black with yellow base. Posterior femur yellow at base, light brown at middle, distal part dark brown. Fore and middle tibiae and tarsi dark brown to black, posterior tibia and basal tarsomere brown with narrowly dark brown apex, remaining tarsomeres dark brown. Male femur III: 12.5 mm, tibia III: 11.35 mm.

Abdomen. Dark brown, sparsely covered with gray pruinosity. Two basal sternites obscure brownish, third brownish only at base. Male terminalia ( Fig. 3 ) light rusty brown. Ninth tergite with widely rounded posterior margin and small median emargination. Gonocoxite elongate, with large, elongate, blunt-apexed, setose ventromesal lobe. Outer gonostylus long and narrow, slightly curved at apex. Inner gonostylus short, oval with long arched rostral prolongation that is armed with two long subbasal spines starting from single tubercle; elongate lobe starts from dorsal surface of stylus, distally lobe covers outer gonostylus, apex with brush of long setae starting at right angle and pointed laterally. Paramere long, wide at base, distal part triangle-shaped. Penis long, narrower distally, bifid at apex.

Elevation range in Korea. Unknown.

Period of activity. Single specimen was collected at the beginning of September.

Habitat. Unknown.

General distribution. Currently known only from Shikoku Island, Japan and recorded here from the Korean Peninsula for the first time.

Figures

FIGURES 1–3. Libnotes (Laosa) charmosyne. 1: general view; 2: wing; 3: male genitalia, dorsal view.