Peromitra fimbriata Nakayama & Shima, 2002

Peromitra fimbriata Nakayama & Shima, 2002 View in CoL

( Figs. 1D View FIGURE 1 , 2G–I View FIGURE 2 , 4G–I View FIGURE 4 , 5D View FIGURE 5 , 8 View FIGURE 8 , 12 View FIGURE 12 )

Peromitra fimbriata Nakayama & Shima, 2002: 67 View in CoL . Type locality: Kyushu, Japan.

Diagnosis. This species can be distinguished from the other Peromitra species by the combination of the following characteristics: ocellar region slightly raised; male epandrium nearly symmetrical, epandrial lobe with densely covered numerous strong, fringed bristles; hypandrium nearly symmetrical, posterior margin rounded, without any hooked process; aedeagus basically tubular, slightly curved upwardly; dorsal plate of aedeagus extended to right side of core plate, with triangular process at apex of apical extension; core membranous plate of aedeagus with blunt apex.

Description. Male. Body length mm (n=2). Head ( Figs. 1D View FIGURE 1 , 2G–I 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 slightly raised ridge along posterior margin; ocellar region ( Fig. 2G–I View FIGURE 2 ) slightly raised, twice wider than long; anterior ocellus oval, twice wider than long, as wide as lateral ocelli, protruded anterodorsally. First flagellomere brown, subglobose. Arista brown, located subapically. Palpus yellowish brown, with single long apical bristle and slightly shorter bristles along apex to ventral margin. Labrum and labella pale yellow, short. Thorax ( Fig. 1D 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 short, narrow bristles and posterior pair of long, strong bristles. Pleuron dark brown. Upper half of anepisternum covered with short setae. Legs ( Figs. 1D View FIGURE 1 , 4G–I View FIGURE 4 ). Blackish brown except fore tibia and tarsus yellowish brown and midtarsus brown. Fore tibia ( Fig. 4G View FIGURE 4 ) with single strong dorsal bristle on basal half, single longitudinal row of short dorsal setulae on apical half, and two short posteroapical setae. Apical fore tarsomere widened, with enlarged pulvilli. Midtibia ( Fig. 4H View FIGURE 4 ) with single dorsal longitudinal setal palisade, single pair of dorsal bristles on basal quarter, one anteroventral preapical bristle, one short dorsal seta, two short anteroventral setae near preapical bristle, two long ventroapical spurs and one short ventral bristle near apical spurs. Hind tibia ( Fig. 4I View FIGURE 4 ) with two dorsal longitudinal setal palisades, one strong anterodorsal bristle on basal one-third, one anterodorsal preapical bristle, one dorsoapical bristle, three ventroapical spurs, and some short posteroapical setae. Wing ( Fig. 5D View FIGURE 5 ). 2.40–2.56 mm long (n=2). Costal index 0.44–0.46. Mean costal ratio 1.58:1; range 1.57–1.59:1. Costal setae of costal section II 0.08–0.10 mm long. Vein Rs with single row of short, fine setulae on dorsal face except apical end. Vein R 2+3 absent.Apex of Vein R 4+5 not distinctly widened. Vein M 1 slightly curved basally and nearly straight apically. Veins yellowish brown, membrane hyaline with yellow tinge. 6–7 alular setae present, 0.17 mm long. Halter black. Abdomen ( Fig. 1D View FIGURE 1 ). Tergites blackish brown, shiny. Venter of abdomen dark brown, with single pair of rounded sternite 6. Hypopygium ( Fig. 8A–D View FIGURE 8 ). Epandrium nearly symmetrical, brown. Each epandrial lobe shortly elongated posteroventrally, rounded apically, densely covered with numerous long, strong, fringed bristles apically ( Fig. 8A–C View FIGURE 8 ). Hypandrium large, brown. Lower portion of hypandrium with single pair of lateral membranous lobe cordate, spinulose on posterior and ventral surface; anteroventral portion of lateral membranous lobe rounded ( Fig. 8A, C View FIGURE 8 ). Posterior portion of left side of hypandrium expanded, directing posteroventrally, with rounded margin, with small, rounded ventral process near posteroventral corner of lateral membranous lobe ( Fig. 8A View FIGURE 8 ). Posterior portion of right side of hypandrium similar to left side but slightly larger, directing posteriorly ( Fig. 8C View FIGURE 8 ). Single pair of small anteroventral processes near basal portion of phallapodeme absent ( Fig. 8D View FIGURE 8 ). Cercus and hypoproct short, with some short hairs. Aedeagus ( Fig. 8E, F View FIGURE 8 ). Basically tubular, slightly curved upwardly, consisting of sclerotized dorsal plate and ventral plate surrounding core membranous plate; dorsal plate extended to right side of core plate, with narrow, pointed process protruded from middle and triangular process at apex of apical extension ( Fig. 8B, F View FIGURE 8 ); ventral plate extended apically but shorter than core plate, with single dorsally protruded sclerite at middle of left lateral margin ( Fig. 8E View FIGURE 8 ); core plate membranous, with blunt apex.

Female. Unknown.

Type specimen examined. Holotype, ♂, Japan: Kyushu, Kumamoto Pref., Izumi-mura, Mt. Hakucho-zan , 29.vii.1977, S. Ohara leg. ( BLKU).

Other specimens examined. Korea: 1♂, Gangwon-do , Jeongseon-gun , Gohan-eup, Mt. Jeongamsan, 37°11′19″N, 128°52′44″E, 800 m, 22.ix–28.x.2023, Malaise trap, J. H. Lee et al. leg. [KNU-PHO 2024-0600] ( NIBR) GoogleMaps ; 1♂, Gangwon-do , Pyeongchang-gun , Jinbu-myeon, Mt. Odaesan, 37°47′24″N, 128°33′52.7″E, 898 m, 4–18.viii.2022, Malaise trap, Shin et al. leg. ( KNU) GoogleMaps .

Ecology. Ecological information for the species is largely unknown.

Remarks. Although the overall morphologies of hypopygium of Korean specimens are identical to illustrations of Japanese specimens in Nakayama & Shima (2002) and the holotype specimen ( Fig. 12 View FIGURE 12 ), the morphology of aedeagus differs from the illustrations of the Japanese authors, especially the position of pointed process on right side. This difference might be artifact due to different sample preparation methods (dried or preserved in ethanol) or geographic variations, but examination of the aedeagus of Japanese specimens (preferably holotype specimen) is still warranted to confirm the possibility that Korean specimens are cryptic species.

Distribution. Korea (Gangwon-do), Japan.