Diplonevra incisura Lee & Lee & Kim 2022, sp. nov.
Creators: name: Lee, Jun-Ho
name: Lee, Jun-Gi
name: Kim, Sam-Kyu
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Phoridae
Diplonevra
Diplonevra incisura

description: Diplonevra incisura, sp. nov.
(Figs. 2A–D, 4M–O, 5G, 5H, 7A, 7B, 9A, 9B)
Diplonevra pachycera: Liu & Yang, 2016: 40 (nec Schmitz) (misidentification)
Diagnosis. This species can be distinguished from other Diplonevra species by the combination of the following characteristics: inner face of male hind trochanter with some short, fine setae and group of microtrichia medially and 6–8 strong, pointed setae on ventral margin; ventrobasal area of inner face of male hind femur with one short, fine seta and 3 or 4 strong setae; hind tibia with two dorsal longitudinal setal palisades and two short anteroventral setae on basal half; left plate of hypandrium with round incision at posterodorsal margin.
Description. Male. Body length 1.55–2.37mm (n=10). Head (Fig. 2A). Frons dark brown, shiny. Flagellomere 1 brown, as large as one-sixth of compound eye, subglobose, slightly pointed apically. Arista brown. Palpus brown, narrower than maximum width of flagellomere 1, with 6 or 7 bristles apically and some short hairs ventrally. Labrum and labella pale brown. Thorax (Fig. 2B). Scutum and scutellum dark brown. Posterior margin of scutum with one pair of long prescutellar bristles. Scutellum with two pairs of long bristles of subequal length; both anterior and posterior scutellar bristles convergent but not apically crossing each other. Pleuron (Fig. 2A) dark brown. Legs (Fig. 2A) brown to dark brown except fore tibia to tarsus yellowish brown. Fore tibia with single short dorsal seta on basal half and one row of dorsal short setulae on apical half. Midtibia (Fig. 4M) with two dorsal longitudinal setal palisades; anterodorsal one extending three-fifths of midtibial length while posterodorsal one extending entire length of midtibia. Two dorsal midtibial bristles on basal half protruding at different point each; anterodorsal one at basal one-fifth, posterodorsal one at basal one-sixth of midtibia. Inner face of hind trochanter (Fig. 7A, B) with some short, fine setae and group of microtrichia on median area and 6–8 strong, pointed setae on ventral margin. Ventrobasal area of inner face of hind femur (Fig. 7A, B) with one short, fine seta and 3 or 4 strong setae. Hind tibia (Fig. 4N, O) with two dorsal longitudinal setal palisades, two short anteroventral setae on basal half, and one row of posterodorsal fine setae. Wing (Fig. 5G). 1.31–1.86mm long (n=10). Costal index 0.52–0.57. Mean costal ratio 4.4:0.9:1; range 3.7–4.8:0.7–1.1:1. Costal setae of costal section III 0.02–0.04mm long. Vein of costal sections II–III strongly thickened. Rs with single short hair at base and weak depression at apex. Vein M 1 curved, slightly recurved apically. Vein brown and membrane hyaline with pale brown tinge. Four alular setae present, 0.08–0.12mm long. Halter dark brown. Abdomen (Fig. 2A, B). Tergites dark brown. Venter of abdomen grayish brown. Hypopygium (Fig. 9A, B) dark brown, shiny. Epandrium with numerous hairs on posterodorsal and posterolateral faces. Left side of epandrium (Fig. 9A) with short, blunt epandrial lobe bearing some short hairs and single extremely long apical seta as long as length of cercus. Right side of epandrium (Fig. 9B) with small, rounded extension posteriorly, single long seta posteroventrally, and minute, sharply protruded and hooked lobe on posteroventral corner. Hypandrium tomentose. Left plate of hypandrium (Fig. 9A) oval, with small, rounded incision at posterodorsal margin. Right plate of hypandrium (Fig. 9B) pointed apically in lateral view. Cercus with one pair of pale yellow sclerites mounted dorsally on pale yellow stalk; length of cercus three times as long as maximum width of cercus; stalk with numerous hairs of similar length on surface.
Female. Body length 1.73–2.26mm (n=4). Head (Fig. 2C) similar to male, except flagellomere 1 smaller. Thorax (Fig. 2D) similar to male. Legs similar to male, except without structures on inner face of hind trochanter and femur. Wing (Fig. 5H) similar to male, 1.36–1.86mm long (n=4). Costal index 0.53–0.56. Mean costal ratio 3.8:0.9:1; range 3.5–4.3:0.8–0.9:1. Costal setae of costal section III 0.02–0.04mm long. Four alular setae present, 0.05–0.10mm long. Halter dark brown. Abdomen (Fig. 2C, D). Tergites present only on abdominal segment 1–5 and 9. Tergites 1–4 fully developed, dark brown. Tergite 5 dark brown, slightly narrower than width of posterior margin of tergite 4, with rounded posterolateral margin. Dorsomedial face of abdominal segment 6 without tergite but smooth, slightly melanized. Membranous area of dorsum and venter of abdominal segment 1–7 grayish brown. Abdominal segment 8 membranous, grayish brown, with short hairs dorsally and longer hairs ventrally. Abdominal segment 9 yellowish brown, flattened, tapering apically; tergite 9 with median ridge bearing one pair of long hairs posteriorly; sternite 9 with erected short hairs on surface. Cercus yellowish brown, rounded, with two long hairs apically.
Etymology. The specific epithet refers to the rounded incision on the posterodorsal margin of the left plate of the hypandrium.
Type specimens. Holotype, ♂, South Korea: Gyeongsangnam-do, Jinju-si, Ibanseong-myeon, Daecheon-ri, Gyeongsangnamdo Arboretum, 35°09′39.7″N, 128°17′41.3″E, 18.vi–1.vii.2012, Malaise trap, J. H. Hwang leg. (NIBR). Paratypes, 1♂, same data as holotype (KNU); 1♂, same locality as holotype, 16.v–1.vi.2011, Malaise trap, J. H. Hwang leg. (KNU); 1♀, same locality as holotype, 30.vi–15.vii.2011, Malaise trap, J. H. Hwang leg. (KNU); 4♂, same locality as holotype, 17–30.vi.2011, Malaise trap, J. H. Hwang leg. (KNU).
Other specimens examined. South Korea: 3♂ 1♀, Jeollanam-do, Gwangyang-si, Ongnyong-myeon, Chusanri, Southern Experimental Forest of Seoul National University in Mt. Baegunsan, 35°01′52.9″N, 127°36′24.8″E, 15–30.vii.2019, Malaise trap, Nam & Park leg. (KNU); 2♂ 1♀, ditto, 30.vii–12.viii.2019, Malaise trap, Nam & Park leg. (KNU); 1♂ 1♀, Chungcheongnam-do, Boryeong-si, Daecheon 4-dong, 36°20′04.3″N, 126°37′15.9″E, 8.vii–6.viii.2020, Malaise trap, J. H. Sohn et al. leg. (KNU); 1♂, Jeollabuk-do, Gochang-gun, Asan-myeon, Banamri, 35°29′48.3″N, 126°36′46.3″E, 9–23.vii.2020, Malaise trap, J. H. Sohn et al. leg. (KNU); 1♂, Daejeon, Yuseonggu, Seongbuk-dong, 36°18′52.6″N, 127°17′23.3″E, 22.viii–26.ix.2020, Malaise trap, Oh & Park leg. (KNU).
Ecology. Ecological information for the species is largely unknown.
Remarks. The Chinese record of D. pachycera (Liu & Yang 2016) is considered a misidentification of the new species D. incisura, sp. nov., based on comparison of the following characters with reference to the lectotype and original description of D. pachycera: size of flagellomere 1, color of male cercus, hind leg setation, and hypopygium (Fig. 10).
Distribution. Korea (Chungcheongnam-do, Daejeon, Jeollabuk-do, Jeollanam-do, Gyeongsangnam-do), China
description: Published as part of Lee, Jun-Ho, Lee, Jun-Gi & Kim, Sam-Kyu, 2022, A taxonomic study on the South Korean Diplonevra (Diptera: Phoridae), pp. 238-260 in Zootaxa 5138 (3) on pages 250-252, DOI: 10.11646/zootaxa.5138.3.2, http://zenodo.org/record/6559483