Nephrotoma furvligulata, Wang & Ren & Yang & Chen, 2025

Nephrotoma furvligulata sp. nov.

Figs 2–4 View Figures 2–4 , 5–9 View Figures 5–9 , 10–12 View Figures 10–12 , 13–15 View Figures 13–15

Type material.

Holotype. China – Qinghai Prov. • ♂; Qilian, Binggou ; 3075 m a. s. l.; 38.1333°N, 100.1678°E; 27 Jul. 2023; X. Wang leg.; light trap; XJAU TN 2310243 . GoogleMaps

Paratypes. China – Qinghai Prov. • 2 ♂♂, 3 ♀♀; Qilian, Lujiaogou ; 2867 m a. s. l.; 38.1164°N, 100.3407°E; 30 Jul. 2023; X. Wang leg.; light trap; XJAU TN 2310691 to TN 231095 GoogleMaps • 2 ♂♂, 2 ♀♀; Qilian, Lujiaogou ; 3311 m a. s. l.; 38.1132°N, 100.4744°E; 30 Jul. 2023; X. Wang leg.; light trap; XJAU TN 2310539 to TN 2310542 GoogleMaps • 3 ♂♂; Qilian, Huangcang Temple Water Conservancy Hub Project ; 2579 m a. s. l.; 38.2499°N, 100.1836°E; 2 Aug. 2023; X. Wang leg.; light trap; XJAU TN 2310734 to TN 2310736 GoogleMaps .

Diagnosis.

Body yellow. Occipital marking triangular, dark brown, laterally with pale-brown spots. Antenna reaching the base of abdomen when bent backward. Space between lateral and median stripes of prescutum and presutural scutum narrow. Tergite 9 posteriorly with narrow median notch and broad, inclined projections, its margin covered with tiny black spines. Sternite 8 with a bifurcated appendage. Clasper of gonostylus with posterior crest possessing a triangular projection.

Description.

Male. Body length 9.0– 11.1 mm, wing length 9.3–10.7 mm, antenna length 3.6–4.5 mm ( N = 8).

Head (Figs 2 View Figures 2–4 , 3 View Figures 2–4 ). Mostly yellow, vertex with dark brown spot. Occipital marking triangular, dark brown, laterally with pale brown spots. Nasus dark brown. Rostrum brown. Head with brown setae. Antenna 13 - segmented, reaching the base of abdomen when bent backward; scape yellow, with apical third brown, pedicel and flagellar segments brown. Length of verticils reaching almost 3 / 5 length of the corresponding segment. Terminal segment of flagellum round. Palpi brownish, terminal segment pale, darkened at base.

Thorax (Figs 2 View Figures 2–4 , 3 View Figures 2–4 ). Mostly yellow. Pronotum black, yellow middorsally. Prescutum and presutural scutum with three longitudinal black stripes; lateral stripe apically bent outward; space between lateral and median stripes narrow. Postsutural scutum yellow in the middle, each lobe with large black spot; posterior-lateral margin brown. Scutellum yellow with a black median line. Mediotergite yellow with broad black median stripe, with posterior margin blackened. Anepisternum and katepisternum basally each with a large black spot. Anepimeron blackened apically; katepimeron with small median black spot. Meron blackened basally. Legs yellow. Coxae yellow, variegated with dark brown spots at the base. Apices of tibiae and femora dark brown, tarsal segments dark brown. Wing pale brown with a distinct dark brown pterostigma and macrotrichiae; brown shadow at vein R 4 + 5 and crossvein r-m; cell m sessile (Fig. 4 View Figures 2–4 ). Halter with stem dark brown; knob pale yellow with a dark brown margin (Fig. 2 View Figures 2–4 ).

Abdomen (Fig. 2 View Figures 2–4 ). Mainly yellow. Abdominal tergites with three broad black longitudinal stripes; the median stripe broader than the lateral stripes. Abdominal sternites 5–7 with an interrupted longitudinal stripe. Abdominal segments 8–9 black.

Hypopygium (Figs 5–9 View Figures 5–9 ). Tergite 9 posteriorly with broad, inclined projections, its margin covered with tiny black spines (Fig. 7 View Figures 5–9 ). Posterior margin with narrow, U-shaped notch. Sternite 8 apically with a bifurcated appendage (Fig. 6 View Figures 5–9 ). Sternite 9 posteriorly with sparse setae, and a sclerotized projection at the middle (Figs 5 View Figures 5–9 , 6 View Figures 5–9 ). Gonocoxite separated from sternite 9, irregularly oval with smooth and slightly curved margins, featuring a slightly indented inward apex (Fig. 5 View Figures 5–9 ). Lobe of gonostylus flattened, with weak lateral protrusion and obtuse apex (Figs 5 View Figures 5–9 , 9 View Figures 5–9 ). Clasper of gonostylus with a large concavity at the base; beak obtuse; posterior crest with a triangular projection and sparse setae; outer basal lobe nearly oval, apically rounded; lower beak with a vaulted protuberance; the margin extending from the beak to the lower beak, strongly sclerotized (Fig. 8 View Figures 5–9 ). Semen pump with posterior immovable apodeme darkened, directed backward, tip outward (Figs 10–12 View Figures 10–12 ). Compressor apodeme blackish-brown, fan-shaped, forming an 80 ° angle with the posterior immovable apodeme. Anterior immovable apodeme narrower than the compressor apodeme.

Female. Body length 12.9–15.1 mm, wing length 10.5–12.6 mm, antenna length 3.3–3.9 mm ( N = 5). Resembles male in body coloration. Tergite 8, tergite 9, sternite 8, and basal region of tergite 10 dark brown (Figs 13–15 View Figures 13–15 ).

Ovipositor (Figs 13–15 View Figures 13–15 ). Cercus narrowed toward tip (Figs 13 View Figures 13–15 , 15 View Figures 13–15 ). Hypogynial valve curved upwards apically (Figs 13 View Figures 13–15 , 14 View Figures 13–15 ).

Elevation range in China.

Adults were collected at altitudes ranging from 2000 m to 2500 m.

Period of activity.

Adults were collected only in late July.

Distribution.

China, Qinghai (Fig. 1 View Figure 1 ).

Etymology.

The specific name (from Latin furvus (adj., meaning “ dark ”) and Latin ligulatus (adj., meaning “ ligulate ” )) refers to the abdominal tergites bearing a darker mid-longitudinal stripe and to sternite 8 posteriorly with a bifurcated appendage that extends outward at its apex in ventral view.

Remarks.

The new species is similar to N. ligulata Alexander, 1925 , in the shape of sternite 8 and the lobe of the gonostylus. However, it can be distinguished by the following features: in N. furvligulata sp. nov. the space between the lateral stripe and the median stripe of the prescutum and presutural scutum is narrow; the mediotergite is yellow with a broad black median stripe; the abdominal tergites have broad longitudinal stripes. In N. ligulata , the space between the lateral stripe and the median stripe of the prescutum and presutural scutum is broad; the mediotergite is yellow with a thin black median stripe; the abdominal tergites on segments 1–4 have longitudinal stripes at the posterior margin ( Mannheims 1967; de Jong 1993).