Diplonevra nigritarsis, Lee & Lee & Kim, 2022

Lee, Jun-Ho, Lee, Jun-Gi & Kim, Sam-Kyu, 2022, A taxonomic study on the South Korean Diplonevra (Diptera: Phoridae), Zootaxa 5138 (3), pp. 238-260 : 252-254

publication ID	https://doi.org/ 10.11646/zootaxa.5138.3.2
publication LSID	lsid:zoobank.org:pub:11C1592C-6EB3-4705-A65A-F0589E602139
DOI	https://doi.org/10.5281/zenodo.6564879
persistent identifier	https://treatment.plazi.org/id/97041566-5163-C745-78A6-FAC1FC40F8D8
treatment provided by	Plazi
scientific name	Diplonevra nigritarsis
status	sp. nov.

Treatment

Diplonevra nigritarsis View in CoL , sp. nov.

( Figs. 2E–H View FIGURE 2 , 4P–R View FIGURE 4 , 5I, 5J View FIGURE 5 , 7C, 7D View FIGURE 7 , 9C, 9D View FIGURE 9 )

Diploneura pachicera [sic]: Michailovskaya, 1990: 696 (nec Schmitz) (misidentification).

Diplonevra pachycera: Michailovskaya, 2000: 6 View in CoL (nec Schmitz) (misidentification).

Diagnosis. This species can be distinguished from other Diplonevra species by the combination of the following characteristics: fore, mid-tarsi yellowish brown except dorsal face of tarsomere 5 dark brown; inner face of male hind trochanter with some short, fine setae on median area and 5 and 6 strong, pointed setae on ventral margin; ventrobasal area of inner face of male hind femur with two long, narrow setae and three thicker strong setae; hind tibia with two dorsal longitudinal setal palisades and single short anteroventral seta on basal half; hypopygium with fan-shaped left plate of hypandrium and short cercus.

Description. Male. Body length 1.80–2.26mm (n=6). Head ( Fig. 2E View FIGURE 2 ). Frons blackish brown, shiny. Flagellomere 1 blackish brown, as large as about half of compound eye, ovoid. Arista dark brown. Palpus dark brown, narrower than maximum width of flagellomere 1, with 4–6 bristles and one short seta apically, and some short hairs ventrally. Labrum and labella pale yellow. Thorax ( Fig. 2F View FIGURE 2 ). Scutum and scutellum blackish brown. Posterior margin of scutum with 2 or 3 pairs of long prescutellar bristles; inner 1 or 2 pairs shorter and weaker than outermost one pair. Scutellum with two pairs of long bristles of subequal length; anterior scutellar bristles convergent; posterior scutellar bristles convergent and rarely crossing apically each other. Pleuron ( Fig. 2E View FIGURE 2 ) blackish brown. Legs ( Fig. 2E View FIGURE 2 ) dark brown except fore, mid-tibiae to tarsomeres 1–4 yellowish brown; dorsal face of tarsomere 5 dark brown. Fore tibia with single short dorsal seta on basal half. Midtibia ( Fig. 4P View FIGURE 4 ) with two dorsal longitudinal setal palisades; anterodorsal one extending two-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. 7C, D View FIGURE 7 ) with some short, fine setae on median area and 5 or 6 strong, pointed setae curved upward at tip on ventral margin. Ventrobasal area of inner face of hind femur ( Fig. 7C, D View FIGURE 7 ) with two long, narrow setae and three thicker strong setae. Hind tibia ( Fig. 4Q, R View FIGURE 4 ) with two dorsal longitudinal setal palisades, one short anteroventral seta on basal half, and one row of posterodorsal fine setae. Wing ( Fig. 5I View FIGURE 5 ). 1.64–1.96mm long (n=6). Costal index 0.56–0.57. Mean costal ratio 2.9:0.9:1; range 2.7–3.2:0.8–1.0:1. Costal setae of costal section III 0.05–0.06mm long. Vein of costal sections II–III strongly thickened. Base of Rs with single short hair. Vein M 1 curved, slightly recurved apically. Vein brown and membrane hyaline with grayish yellow tinge; 3–5 (mostly 3) alular setae present, 0.08–0.12mm long. Halter dark brown. Abdomen ( Fig. 2E, F View FIGURE 2 ). Tergites blackish brown. Venter of abdomen dark brown. Hypopygium ( Fig. 9C, D View FIGURE 9 ) blackish brown, shiny. Epandrium with several hairs on dorsal and lateral faces. Left side of epandrium ( Fig. 9C View FIGURE 9 ) with short, sharply pointed epandrial lobe bearing some short hairs and one long apical seta. Right side of epandrium ( Fig. 9D View FIGURE 9 ) with obtuse-angled posterior margin and minute, hooked lobe at posteroventral corner. Hypandrium tomentose. Left plate of hypandrium ( Fig. 9C View FIGURE 9 ) fan-shaped. Right plate of hypandrium ( Fig. 9D View FIGURE 9 ) tapering posteriorly, with rounded posterior margin. Cercus with one pair of yellowish brown sclerites mounted dorsally on dark brown stalk; length of cercus twice as long as maximum width of cercus; stalk with numerous hairs of similar length on surface.

Female. Body length (Fig.) 1.92–2.30mm (n=4). Head ( Fig. 2G View FIGURE 2 ) similar to male, except flagellomere 1 smaller. Thorax ( Fig. 2H View FIGURE 2 ) similar to male. Legs similar to male, except followings: structures on inner face of hind trochanter and femur absent; hind tibia with 0–2 anteroventral short setae. Wing ( Fig. 5J View FIGURE 5 ) similar to male, 1.53–1.79mm long (n=4). Costal index 0.54–0.57. Mean costal ratio 3.0:1.1:1; range 2.9–3.2:0.9–1.2:1. Costal setae of costal section III 0.04–0.05mm long. Four alular setae present, 0.09–0.12mm long. Halter dark brown. Abdomen ( Fig. 2G, H View FIGURE 2 ). Tergites present only on abdominal segments 1–5 and 9. Tergites 1–4 fully developed, blackish brown. Tergite 5 narrower than tergite 4, rectangular, blackish brown. Dorsomedial face of abdominal segment 6 without tergite but smooth, slightly melanized. Membranous area of dorsum and venter of abdominal segment 1–7 grayish to dark brown. Abdominal segment 8 membranous, grayish brown, with short hairs dorsally and longer hairs ventrally. Abdominal segment 9 dark 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 dark brown, rounded, with two long hairs apically.

Etymology. The specific epithet refers to the dark brown dorsal face of tarsomere 5.

Type specimens. Holotype, ♂, South Korea: Gyeonggi-do, Yeoncheon-gun, Baekhak-myeon, Tonggu-ri , near Baekhak Reservoir , 38°01′43″N, 126°55′16.1″E, 31.v–7.vi.2020, Malaise trap, J. H. Lee leg. ( NIBR) GoogleMaps . Paratypes, 1♀, same data as holotype ( KNU) GoogleMaps ; 2♂ 2♀, same locality as holotype, 7–14.vi.2020, Malaise trap, J. H. Lee leg. ( KNU) GoogleMaps ; 2♂, ditto ( NIBR) GoogleMaps ; 1♀, same locality as holotype, 14–28.vi.2020, Malaise trap, J. H. Lee leg. ( KNU) GoogleMaps .

Other specimens examined. South Korea: 1♂, Incheon, Bupyeong-gu, Cheongcheon 1-dong, Incheon Butterfly Park , 37°31′12.4″N, 126°41′33.2″E, 1–14.v.2012, Malaise trap, M. S. Koh leg. ( KNU) GoogleMaps .

Ecology. Ecological information for the species is largely unknown.

Remarks. The Russian Far East records of D. pachycera (Michailovskaya 1990, 2000) are considered a misidentification of the new species D. nigritarsis , sp. nov., based on comparison of the following characters with reference to the lectotype and original description of D. pachycera : color of fore tarsomere 5, hind leg setation, and hypopygium ( Fig. 10 View FIGURE 10 ). Male hind leg characteristics of the new species are somewhat similar to those of the Chinese species D. vecticrassa Liu & Yang, 2016 but can be distinguished from the latter by absence of an ascending process on the inner face of the ventrobasal area of the hind femur (present in D. vecticrassa ) and by a single anteroventral short seta on the hind tibia (2 or 3 setae in D. vecticrassa ).

Distribution. Korea (Gyeonggi-do, Incheon), Russia (Far East).