Hexatoma (Eriocera) gifuensis Alexander, 1933

Podenas, Sigitas, Park, Sun-Jae, Byun, Hye-Woo & Podeniene, Virginija, 2022, Hexatoma crane flies (Diptera, Limoniidae) of Korea, ZooKeys 1105, pp. 165-208 : 165

Hexatoma (Eriocera) gifuensis Alexander, 1933

Figs 3 , 7-11 , 59

Hexatoma (Eriocera) gifuensis Alexander 1933: 153-155, pl. 1, figs 15-16, pl. 2, fig. 33.

Type material examined.

Holotype, male (wing and genitalia slide mounted), Japan, Gifu, 6 June 1931, Kariya leg. (USNM). Allotype, female (antenna, wing and ovipositor slide mounted on same slide as holotype), topotypic (USNM).

Other examined material

(Fig. 59 ). South Korea, 1 female (in ETOH), Gyeonggi-do, Paju-si, Gunnae-myeon, Jeongja-ri , Warrior Base Training Area , 37°55.07'N, 126°44.50'E, alt. 20 m, 18 July 2017, T. A. Klein, H.-C. Kim leg., NJ trap (NIBR) ; 1 female, 1 specimen, sex unknown (in ETOH), same collection data as for preceding, 25 July 2017 (NIBR) ; Japan, 1 male (marked as metatype; antenna, leg and wing slide mounted), Shikoku, Matsuyama, Iyo , 14 September 1947, T. Ishihara leg. (USNM) ; 1 male (pinned, genitalia in microvial with glycerol), Niigata, 16 August 2021, coll. D. Kato (NRC) .

Description.

Body dark brown. Male body length 9.5 mm, wing length 14.3 mm. Female body length 12.5-13.5 mm, wing length 12.0-12.2 mm.

Head. Dark brown, postero-laterally yellowish. Vertical tubercle large, dark brown, yellowish laterally. Eyes widely separated, distance between them at the base of the antennae nearly the same as length of both basal antennomeres. Male antenna 47.3 mm long, ~ 3 × as long as the entire body (Fig. 10 ). Antennal scape elongate, nearly cylindrical, brownish yellow with short and erect dark brown setae dorsally and ~ 3 × as long as pedicel. Pedicel small, subglobular, brownish yellow. Rostrum brown. Palpus and mouth parts dark brown.

Thorax. Cervical sclerites dark brown. Pronotum short but wide, brown. Prescutum and presutural scutum grayish brown with three longitudinal dark brown stripes. Medial stripe separated anteriorly by narrow grayish line, which is missing posteriorly. Tubercular pits missing, pseudosutural fovea brown. Dorsopleural membrane dark brown, yellowish anteriorly. Postsutural scutum with each lobe brown with concave elongate dark brown spot in middle, area between lobes brown. Scutellum dark brown, lighter along posterior margin. Mediotergite entirely brown. Pleuron uniformly dark brown. Episternum bare, setoseless. Meron comparatively small, second and third pairs of legs close together. Wing (Fig. 3 ) with brownish tinge, costal area darker, all veins narrowly surrounded with darker brownish. Stigma distinct, dark brown, short, just slightly longer than wide. Veins brown, yellow in costal area. Venation: Sc long, reaching wing margin slightly beyond r-m, sc-r approximately at r-m. Radial sector long, nearly straight, slightly arched or angulate at base, if angulate then with very short spur. Free end of R1 concave, R2 close to R1 apex. R3 and R4 diverging towards wing margin, cell r3 with long stem, which is half as long as Rs. Cross-vein r-m distinct, transverse, in alignment with basal deflection of M1 (base of discal cell). Discal cell 1.8 × longer than wide. Cross-vein m-cu slightly beyond base of discal cell. Vein CuP distinctly curved at distal part, thus cell cup gets wider towards wing margin. Anal vein long, slightly concave in middle, apex reaching wing margin at the level of Rs base. Anal angle wide, posterior margin widely rounded. Halter pale with black knob and slightly darkened base of stem. Length of male halter 1.5 mm, that of female 1.3 mm. Coxae dark brown dorsally, yellowish ventrally and posteriorly. Trochanters obscure yellow. Femur yellow with narrowly blackened distal part. Tibia brownish yellow with narrowly darkened apex. Basal tarsomere brownish with yellow base, remainder of tarsus brown to dark brown or black. Covered with long dense dark brown setae. Male femur I: 5.5 mm long, II: 4.3 mm, III: 7.9 mm, tibia I: 7.9 mm, II: 9.9 mm, III: 11.3 mm, tarsus I: 7.4 mm, II: 10.3 mm, III: 7.2 mm. Tibia of fore leg with single apical spur, tibiae of middle and hind pairs of legs with two apical spurs each.

Abdomen. Tergites dark brown, narrowly yellow laterally, with two pairs of transverse indistinct sutures. Sternites dark brown along middle, yellow laterally. Male terminalia (Fig. 7 ) dark brown to black. Epandrium wider than long, posterior margin with deep and wide V-shaped emargination. Gonocoxite elongate, 2 × longer than wide at base, dorsal surface with narrow pale stripe across middle. Two pairs of long narrow gonostyli. Outer gonostylus sclerotized, long, slightly arched, apex spine-shaped. Inner gonostylus elongate, fleshy and setose, spindle shaped. Paramere bilobed, outer lobe elongate, knife-shaped, distal part slightly arched, lower lobe wide, plate-shaped (Figs 8 , 9 ). Aedeagus simple, short and straight, bifid at apex. Aedeagal sheath completely covers aedeagus dorsally. Anterior apodeme long with membranous lobes along both sides, extending far beyond frontal margin of aedeagal sheath. Ovipositor (Fig. 11 ) brownish yellow, valvae long and narrow.

Elevation range in Korea.

Ca. 20 m altitude.

Period of activity in Korea.

Second half of July.

Habitat.

Unknown. Attracted to light.

General distribution.

Honshu and Shikoku islands of Japan. Recorded in the Korean Peninsula for the first time.

Figures

Figures 1 - 6. Hexatoma wings 1 H. (Cladolipes) simplex (Loew, 1865) 2 H. (Coreozelia) cimicoides (Scopoli, 1763) 3 H. (Eriocera) gifuensis Alexander, 1933 4 H. (Euhexatoma) triphragma Alexander, 1936, holotype 5 H. (Hexatoma) khasiensis Alexander, 1962, holotype 6 H. (Parahexatoma) angustatra Alexander, 1963, holotype. Scale bars: 1.0 mm. (1 redrawn after Mendl (1979) and Savchenko (1989); 2 redrawn after Slipka (1949)).

Figures 7 - 11. Hexatoma (Eriocera) gifuensis Alexander, 1933 7 male genitalia, dorsal view 8 aedeagal complex, fronto-dorsal view 9 aedeagal complex, dorsal view 10 male, general vew 11 ovipositor, lateral view (tip of cercus broken). Scale bars: 0.5 mm (7); 0.1 mm (8, 9); 1.0 mm (10, 11).

Figures 59 - 66. Sampling localities of Korean Hexatoma (Eriocera) 59 H. (E.) gifuensis Alexander, 1933 60 H. (E.) ilwola sp. nov. 61 H. (E.) masakii Alexander, 1934 62 H. (E.) pernigrina Alexander, 1938 63 H. (E.) pianigra sp. nov. 64 H. (E.) serenensis sp. nov. 65 H. (E.) stackelbergi Alexander, 1933 66 H. (E.) ussuriensis Alexander, 1934.