Peromitra dextra, Lee & Kim, 2025

Peromitra dextra sp. nov.

( Figs. 1C View FIGURE 1 , 2D–F View FIGURE 2 , 4D–F View FIGURE 4 , 5C View FIGURE 5 , 7 View FIGURE 7 )

Diagnosis. This species can be distinguished from the other Peromitra species by the combination of the following characteristics: ocellar region distinctly protruded; anterior protrusion of ocellar region tapered anteriorly; hind tibia with single strong anterodorsal bristle except one preapical bristle; wing vein R 2+3 absent; hypopygium asymmetrical; right epandrial lobe elongated posteriorly, with single elongated process slightly curved upwardly and blunt apically; left side of posterior margin of hypandrium with large hooked plate slightly depressed posteroventrally; aedeagus with two membranous apical processes, and numerous spinules on basal one-third of ventral margin.

Description. Male. Body length 2.63 mm (n=1). Head ( Figs. 1C View FIGURE 1 , 2D–F View FIGURE 2 ). Frons black, shiny, with three transverse rows of four long bristles and sparsely covered fine hairs; supra-antennal bristle absent; middle row of bristles nearly straight. Vertex with distinctly raised ridge along posterior margin; ocellar region ( Fig. 2D–F View FIGURE 2 ) distinctly raised, 1.7× wider than long; anterior ocellus oval, twice wider than long, as wide as lateral ocelli, protruded anterodorsally. First flagellomere dark brown, subglobose. Arista dark brown, located subapically. Palpus brown, with single long apical bristle and some shorter bristles along apex to ventral margin. Labrum and labella pale yellow, short. Thorax ( Fig. 1C View FIGURE 1 ). Scutum and scutellum blackish brown. Posterior margin of scutum without strong prescutellar bristles between post-alar bristles. Scutellum with anterior pair of long, narrow bristles and posterior pair of strong bristles distinctly longer than anterior bristles. Pleuron dark brown but lower part below one-third of anepisternum brighter. Upper half of anepisternum covered with short setae. Legs ( Figs. 1C View FIGURE 1 , 4D–F View FIGURE 4 ). Blackish brown except fore tibia and tarsus yellowish brown. Fore tibia ( Fig. 4D View FIGURE 4 ) with single strong dorsal bristle on basal half, single longitudinal row of short dorsal setulae on apical half, one short dorsoapical seta, and two short posteroapical setae. Apical fore tarsomere slightly widened, with enlarged pulvilli. Midtibia ( Fig. 4E View FIGURE 4 ) with single dorsal longitudinal setal palisade, single pair of dorsal bristles on basal quarter, one anteroventral preapical bristle, two long ventroapical spurs and one short ventral bristle near apical spurs. Hind tibia ( Fig. 4F View FIGURE 4 ) with two dorsal longitudinal setal palisades, one anterodorsal bristle on basal third, one anterodorsal preapical bristle, one dorsoapical bristle, three ventroapical spurs, and some short posteroapical setae. Wing ( Fig. 5C View FIGURE 5 ). 2.22 mm long (n=1). Costal index 0.45. Costal ratio 1.15:1. Costal setae of costal section III 0.11 mm long. Vein Rs with single row of short, fine setulae on dorsal face except apical third. Vein R 2+3 absent. Apex of Vein R 4+5 not widened. Vein M 1 slightly curved basally and nearly straight apically. Veins brown, membrane hyaline with yellow tinge. Seven alular setae present, 0.15 mm long. Halter black. Abdomen ( Fig. 1C View FIGURE 1 ). Tergites blackish brown, shiny. Venter of abdomen dark brown, with single pair of rounded sternite 6. Hypopygium ( Fig. 7A–D View FIGURE 7 ). Epandrium asymmetrical, dark brown, with some long hairs medially. Left epandrial lobe elongated posteriorly, pointed apically, with single short, posteriorly pointed process at posteroventral corner ( Fig. 7A View FIGURE 7 ). Right epandrial lobe elongated posteriorly, longer than left epandrial lobe, with single elongated process at posteroventral corner curved upwardly and blunt apically ( Fig. 7B, C View FIGURE 7 ). Hypandrium large, dark brown. Lower portion of hypandrium with single pair of lateral membranous lobe cordate, spinulose; anteroventral portion of lateral membranous lobe distinctly protruded anteriorly ( Fig. 7A, C View FIGURE 7 ). Posterior margin of left side of hypandrium broadened posteriorly, with large, hooked plate slightly depressed posteroventrally, flattened digitiform process in front of hooked plate in lateral view, and small, rounded process near posteroventral corner of lateral membranous lobe ( Fig. 7A View FIGURE 7 ). Posterior margin of right side of hypandrium somewhat depressed, with flattened digitiform process and small, rounded process near posteroventral corner of lateral membranous lobe, similar to left side ( Fig. 7C View FIGURE 7 ). Single pair of small anteroventral processes near basal portion of phallapodeme present, highly sclerotized ( Fig. 7D View FIGURE 7 ). Cercus and hypoproct short, with some short hairs. Aedeagus ( Fig. 7E, F View FIGURE 7 ). Basically tubular, consisting of dorsal tube and ventral process protruded at basal one-third of dorsal tube. Dorsal tube elongated, slightly curved upwardly, with widened membranous apex; membranous apex with two small spines (one at ventrobasal portion and other at anterior end of dorsally extended membrane) ( Fig. 7E View FIGURE 7 ). Ventral process mostly membranous except dorsal margin; basal end of ventral surface with numerous, sclerotized spinules ( Fig. 7E View FIGURE 7 ); apex broadened horizontally, circular, spinulose on right side ( Fig. 7D, F View FIGURE 7 ).

Female. Unknown.

Etymology. The specific epithet refers to the distinctive process on right epandrial lobe.

Type specimen. Holotype, ♂, Korea: Gangwon-do , Hongcheon-gun , Nae-myeon, Sambong National Recreational Forest, 37°52′03.9″N, 128°27′42.4″E, 737 m, 3–24.vii.2023, Malaise trap, S. Shin et al. leg. [KNU-PHO 2024-0572] ( NIBR). GoogleMaps

Ecology. Ecological information for the species is largely unknown.

Remarks. This species is somewhat similar to European species P. carinifrons (Zetterstedt, 1848) and Russian species P. ussurica Michailovskaya, 2000 , which have similar morphology of left side of hypopygium, but can be readily distinguished by characteristics of ocellar region, right epandrial process and aedeagus.

Distribution. Korea (Gangwon-do).