Hesperinus rohdendorfi

Podenas, Sigitas & Kim, Sun-Jae Park and A Young, 2020, Hesperinidae (Diptera: Bibionomorpha) a new family from the Korean Peninsula, Journal of Species Research 9 (2), pp. 170-173 : 171-172

Hesperinus rohdendorfi

Krivosheina & Mamaev, 1967

Hesperinus rohdendorfi Krivosheina & Mamaev, 1967:

236-242; Paramonov, 2005: 232; Krivosheina & Krivosheina, 2015: 315-316.

General: Body coloration black. Body length of male 8.5 mm, wing length 7.0-8.0 mm.

Head: Black with scarce short erect setae dorsally and posteriorly. Eyes rounded, widely separated, vertex with three distinct ocelli. Male antenna 5.2 mm long, reaching to about middle of abdomen if bent backward. Both basal antennomeres dark brown to black. Scape slightly wider than longer, pedicel nearly as long as scape. Flagellum brown, 10-segmented. Basal flagellomere narrowly pale at base, elongate, 1.6 times as long as succeeding flagellomere, remaining flagellomeres decreasing in length towards apex. Five basal flagellomeres slightly swollen subapically. Length of apical segment slightly exceeds that of penultimate. Flagellomeres covered by erect pubescence. Longest verticils up to 0.3 times as long as respective segments. Rostrum dark brown. Palpus four-segmented, if ex- tended, reaches slightly beyond apex of basal flagellomere. Three basal flagellomeres and base of fourth segment brown, remainder of fourth segment pale. Labellum brownish, setose. Thorax: Cervical sclerites pale. Pronotum brownish. Mesonotal prescutum generally dark brown to black, brownish along lateral margin and posteriorly. Scutellum brown. Pleuron brown, anepisternum and anepimeron dark brown to black dorsally, katepisternum ventrally blackened. Wing brownish, more intensely infuscate along frontal margin. Stigma indistinct, elongate. Veins brown. Venation: Sc long, reaching distinctly beyond cross-vein r -m, R 1 long and nearly straight, radial sector with two branches R 2 + 3 and R 4 + 5 which are strongly diverging at wing margin. Cell m 1 large with short stem, cross-vein bm -m indistinct. CuA strongly arched distally, CuP indistinct, slightly arched. Wing cells without macrotrichi-

A

B

ae. Anal lobe large, nearly right-angled. Halter elongate, covered with macrotrichiae. Halter pale at base, stem brownish, knob pale, rounded. Length of male halter 1.1- 1.3 mm. Leg long and slender. Fore coxa brown with darker along dorsal margin, middle and posterior coxae pale-brownish with indistinct darker spots. Trochanters pale-yellow. Femur dark brown, pale at base, longer than tibia. Tibia dark brown with apical spurs. Fore tibia with single spur. Tarsus five-segmented, nearly as long as tibia. Tarsal claw simple without additional teeth, pulvilla short. Male femur I: 3.7 mm, tibia I: 3.1 mm long. Abdomen: Dark brown to black. Tergites brown with narrow line along lateral margin and slightly darkened posteriorly. Sternites grayish-brown, two basal sternites slightly darker. Male terminalia slightly enlarged, wider than the remainder of abdomen, black. Tergite with very wide emargination of posterior margin. Gonocoxite large. Both gonocoxites reaching each other ventrally. Gonostylus large, plateshaped, setose, with elongate postero-mesal angle, distinct darkened sclerotized lobe subbasally and small lobe at posterior margin, both lobes connected with narrow ridge. Edeagus straight, slightly widened subapically.

Elevation range in Korea. Captured slightly above 900 m. Period of activity. End of May or beginning of June.

Habitat. Unknown in Korea. Larvae develop in rotten wood of deciduous trees ( Maackia amurensis , Ulmus propinqua , Chosenia arbutifolia and different species of birch trees Betula ) ( Krivosheina & Krivosheina, 2015).

General distribution. Eastern Siberia and Far East of Russia.

Examined material. 2 males (in ethanol), S. Korea, Gangwon-do , Pyeongchang-gun , Jinbu-myeon, Mt. Odaesan, 37°47′34.58″N, 128°33′37.97″E, alt. 929 m, 2019. V.27-VI.01, coll. HDS, PSH, Malaise trap .