Peromitra ussurica Michailovskaya 2000
Creators: name: Lee, Jun-Ho
name: Kim, Sam-Kyu
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Phoridae
Peromitra
Peromitra ussurica

description: Peromitra ussurica Michailovskaya, 2000
(Figs. 1H, 2P–R, 4P–R, 5H, 11)
Peromitra ussurica Michailovskaya, 2000: 167. Type locality: Ussuriysk, Russia.
Diagnosis. This species can be distinguished from the other Peromitra species by the combination of the following characteristics: ocellar region distinctly protruded; lateral area between ocellar region and compound eyes concave, bare, highly sclerotized; hind tibia with single strong anterodorsal bristle except one preapical bristle; wing vein R 2+3 absent; hypopygium asymmetrical; right epandrial lobe extended posteroventrally, ventral margin curved upwardly, with single pointed process at posteroventral corner; left side of posterior margin of hypandrium with large hooked plate; right side of posterior margin of hypandrium not enlarged.
Description. Male. Body length 2.53 mm (n=1). Head (Figs. 1H, 2P–R). Frons black, shiny, with three transverse rows of four long bristles and sparsely covered fine hairs; supra-antennal bristle absent; middle row of bristles slightly recurved. Vertex with distinctly raised ridge along posterior margin; ocellar region (Fig. 2P–R) distinctly raised, 1.5× wider than long; anterior ocellus oval, 3× wider than long, twice wider than lateral ocelli, protruded anterodorsally; lateral area between ocellar region and compound eyes concave, bare, highly sclerotized. First flagellomere dark reddish brown, subglobose. Arista brown, located subapically. Palpus dark reddish brown, with single long apical bristle and some shorter bristles along apex to ventral margin. Labrum and labella pale yellow, short. Thorax (Fig. 1H). 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 but lower part under one-third of anepisternum brighter. Upper half of anepisternum covered with short setae. Legs (Figs. 1H, 4P–R). Blackish brown except fore tibia and tarsus yellowish brown and midtarsus brown. Fore tibia (Fig. 4P) 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. 4Q) with single dorsal longitudinal setal palisade, single pair of dorsal bristles on basal quarter, one anteroventral preapical bristle, one short anterodorsal seta, two long ventroapical spurs and one short ventral bristle near apical spurs. Hind tibia (Fig. 4R) 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. 5H). 2.61 mm long (n=1). Costal index 0.43. Costal ratio 1.22:1. Costal setae of costal section III 0.11 mm long. Vein Rs with single row of short, fine setulae on dorsal face except apical one third. Vein R 2+3 absent. Apex of Vein R 4+5 slightly widened. Vein M 1 slightly curved basally and nearly straight apically. Veins brown, membrane hyaline with yellow tinge. Six alular setae present, 0.2 mm long (two of setae broken in Fig. 5H). Halter black. Abdomen (Fig. 1H). Tergites blackish brown, shiny. Venter of abdomen dark brown, with single pair of rounded sternite 6. Hypopygium (Fig. 11A–D). Epandrium asymmetrical, dark brown. Left epandrial lobe elongated posteriorly, pointed apically, with some long hairs basally; ventral margin of left epandrial lobe slightly extended, rounded (Fig. 11A). Right epandrial lobe greatly extended and broadened posteroventrally, with some long hairs basally and some straight carinae near ventral margin converged into posteroventral corner of epandrial lobe (Fig. 11B, C); ventral margin of lobe curved upwardly, rounded, with single pointed process at posteroventral corner (Fig. 11C). Hypandrium large, dark brown. Lower portion of hypandrium with single pair of lateral membranous lobe cordate, spinulose except anteroventral portion (Fig. 11A, C); anteroventral portion of lateral membranous lobe distinctly protruded anteriorly, with single small, rounded process on ventrobasal surface (Fig. 11D). Posterior margin of left side of hypandrium expanded posteriorly, with large, hooked plate, flattened digitiform process under hooked plate, and small, elongated ventral process near posteroventral corner of lateral membranous lobe (Fig. 11A). Posterior margin of right side of hypandrium without hooked plate, with flattened digitiform process and small elongated process near posteroventral corner of lateral membranous lobe similar to left side (Fig. 11C). Single pair of small anteroventral processes near basal portion of phallapodeme present, highly sclerotized (Fig. 11D). Cercus and hypoproct short, with some short hairs. Aedeagus (Fig. 11E, F). Basically tubular, elongated, consisting of dorsal tube and ventral process protruding at middle of dorsal tube. Dorsal tube slightly curved upwardly, with apical portion broadened longitudinally; apical extension of dorsal tube less sclerotized, right side with single long, less sclerotized spine at middle and single short, highly sclerotized spine near serrated ventral margin (Fig. 11F). Ventral process mostly membranous except dorsal margin, with feathery dorsal apex and perpendicularly protruded ventral membrane.
Female. Unknown.
Specimen examined. Korea: 1♂, Gangwon-do, Inje-gun, Buk-myeon, Hangye-ri, 38°08′46.5″N, 128°15′47.5″E, 22.xi.2018, Malaise trap, S. Nam leg. [KNU-PHO 2023-0685] (NIBR).
Ecology. Ecological information for the species is largely unknown.
Remarks. The overall morphology of hypopygium is similar to European species P. carinifrons (Zetterstedt, 1848) but can be readily distinguished by characteristics of ocellar region, right epandrial lobe and aedeagus.
Distribution. Korea (Gangwon-do), Russia (Far East).
description: Published as part of Lee, Jun-Ho & Kim, Sam-Kyu, 2025, First record of the scuttle fly genus Peromitra (Diptera: Phoridae) from South Korea, with a key to world species, pp. 111-135 in Zootaxa 5594 (1) on pages 127-129, DOI: 10.11646/zootaxa.5594.1.5, http://zenodo.org/record/14954182