Dolichurus albipedigerus Bai & Li, 2025

Dolichurus albipedigerus Bai & Li sp. nov.

Figs 1 A – G View Figure 1 , 2 A – K View Figure 2

Type material.

Holotype. China • ♀; Yunnan Province, Xishuangbanna City, Tropical Botanical Garden Rubber Plantation ; 22°8′3.48′′N, 100°43′5.16′′E; 24.IV-31.V.2019, collected by Qiang Li; malaise trap GoogleMaps . Paratypes. China • 1 ♂; Guangdong Province, Shaoguan City, Nanling Nature Reserve, Chebaling ; 24°42′50.15′′N, 114°15′43.59′′E; 464 m a. s. l.; 01.V-16.VI.2022, collected by Institute of Zoology, Guangdong Academy of Sciences; malaise trap GoogleMaps . China • 1 ♀; Yunnan Province, Xishuangbanna City, Tropical Botanical Garden rainforest 2 ; 21°40′N, 101°24′E; 11.IV-16.V.2021, collected by Li Ma; malaise trap GoogleMaps . China • 1 ♀; Guangdong Province, Shaoguan City, Nanling Nature Reserve, Chebaling ; 24°42′45.34′′N, 114°15′35.94′′E; 449 m a. s. l.; 13.VIII-23.IX.2020, collected by Institute of Zoology, Guangdong Academy of Sciences; malaise trap GoogleMaps . China • 1 ♀; Guangdong Province, Shaoguan City, Nanling Nature Reserve, Scale Frame ; 24°49′59.44′′N, 112°47′50.23′′E; 360 m a. s. l.; 23-27.V.2023, collected by Institute of Zoology, Guangdong Academy of Sciences; malaise trap GoogleMaps . China • 1 ♀; China, Guangdong Province, Shaoguan City, Nanling Nature Reserve, Forward Station ; 24°26′56.01′′N, 113°7′54.28′′E; 782 m a. s. l.; 23.VII-7.VIII.2021, collected by Institute of Zoology, Guangdong Academy of Sciences; malaise trap GoogleMaps . China • 1 ♀; Jiangxi Province, Longnan City, Jiulian Nature Reserve ; 24°32′17.99′′N, 114°27′52.37′′E; 620 m a. s. l.; 23.VIII-4.IX.2020, collected by Institute of Zoology, Guangdong Academy of Sciences; malaise trap GoogleMaps .

Diagnosis.

The new species is similar to D. apiciornatus Tsuneki, 1977 , but differs from it and other congeners by the following characters (characters of D. apiciornatus in parentheses): 1) mandible ivory white medially (mandible ferruginous); 2) OOD: POD = 7: 5 ( OOD: POD = 7: 6); 3) IODv: IODc = 32: 45 ( IODv: IODc = 30: 40); 4) clypeus with weak median carina, anterior part with large ivory-white spot (clypeus without median carina, anterior part with small ivory-white spot); 5) lateral surface of propodeum with conspicuous, longitudinal carinae (lateral surface of propodeum with weak, short carinae anteriorly and posteriorly); and 6) body with ivory-white spots (body black).

Description.

Female. Body length 10.0- 11.3 mm. Black. Nearly entire apical half of lamella ivory white, middle boundary M-shaped; anterior part of clypeus with ivory-white spot, apical lobe transparent yellow. The following ivory white: mandible medially, palpi largely, pronotal tubercle, anterior half of tegula, hypoepimeral area; remaining palpi light brown. The following with ivory-white marks: fore femora apically, outside of mid and hind coxae, tibiae and hind femora. Fore and mid tibiae spurs white, hind tibiae spurs light brown; remainder brown. Wing hyaline and iridescent, veins and stigma light brown (Fig. 1 E View Figure 1 ). Gastral segments IV-VI reddish brown. Vestiture silvery pubescence; most of frons and vertex with silvery, erect pubescence; side of lamella and frons below lamella with appressed silvery pubescence; mandible with yellow, erect macrochaetae. Gaster smooth, practically impunctate (Fig. 1 A, B View Figure 1 ).

Head. In front view, nearly subcircular in outline, HW: HL = 90: 85. Mandible broad and blunt, inner margin tridentate. Clypeus smooth, convex medially, with weak median carina in basal half, apical lobe subtruncate, base width: middle width: apical width = 15: 45: 10 (Fig. 1 F View Figure 1 ). Antennae 12 segments, scape with weak ventral carina. Relative length of antennal segments I: II: III: IV: V: VI: VII: VIII: IX: X: XI: XII = 26: 9: 37: 31: 32: 30: 26: 23: 20: 20: 19: 17. A 3 / aW = 5.3, A 12 / bW = 4.3. Lamella broadened and flat, length: width = 12: 27. Frontal line complete, nearly reaching midocellus, and slightly concave at base of lamella. Frons with weak wrinkles above lamella, mixed with tiny punctures, side of frons with tiny punctures. Inner margins of eyes slightly convergent above, IODv: IODc = 32: 45 (Fig. 1 F View Figure 1 ). POD: OD: OOD = 5: 6: 7, side of ocelli scattered with tiny punctures. In dorsal view, vertex shiny, scattered with tiny punctures, slightly arched above eyes (Fig. 1 B View Figure 1 ). In lateral view, eyes: gena = 29: 12 (Fig. 1 D View Figure 1 ).

Thorax. Pronotum smooth, scattered with tiny punctures, without transverse carina anteriorly, small punctures confluent in several transverse puncture-rows anteriorly, pronotal tubercle slightly raised, hardly projects over level of scutum (in lateral view), median impression shallow (Fig. 1 B, D View Figure 1 ). Scutum and scutellum shiny, scattered with tiny punctures (Fig. 1 B View Figure 1 ). Mesopleuron smooth, scattered with tiny punctures, scrobal sulcus inconspicuously depressed, sternaulus conspicuous (Fig. 1 D View Figure 1 ). Metanotum scattered with punctures (Fig. 1 G View Figure 1 ). Dorsal surface of propodeum with six longitudinal carinae, including two longitudinal carinae, two oblique carinae on either side, and two oblique, longitudinal carinae located further out to sides. Posterior surface of propodeum with radiating reticulation, lateral margin with blunt tooth halfway from dorsum (Fig. 1 G View Figure 1 ). In lateral view, dorsal and posterior surfaces forming obtuse angle, lateral surface of propodeum with conspicuous, longitudinal carinae (Fig. 1 D View Figure 1 ). Ventral surface of tarsi with 2 rows of parallel spines (Fig. 1 A, C View Figure 1 ).

Gaster. Six segments visible. LT 1: WT 1 = 37: 66. Terga smooth. Lateral side of T 1 with conspicuous, longitudinal carinae. Sterna I-VI with small to midsized punctures (Fig. 1 A, C View Figure 1 ).

Male. Similar to female, but body smaller, body length 7.0 mm (Fig. 2 A, B View Figure 2 ). Head in front view, HW: HL = 83: 77. Most of frons, vertex, and gena with silvery, erect long setae. Mandible sharper and slenderer than that of female, inner margin unidentate subapically. Clypeus ivory white except median line and base, median carina extending to anterior margin, base width: middle width: apical width = 15: 44: 11 (Fig. 2 D View Figure 2 ). Antennae 13 segments, scape ventral carina stronger than female. Relative length of antennal segments I: II: III: IV: V: VI; VII: VIII: IX: X: XI: XII: XIII = 27: 7: 28: 26: 26: 23: 21: 20: 17: 11: 11: 10: 12. A 3 / aW = 5.6, A 12 / bW = 4, A 6-11 slightly swollen in middle on ventral surface, swelling bearing conspicuous, erect seta (Fig. 2 G View Figure 2 ). Inner margins of eyes slightly convergent above, IODv: IODc = 42: 45 (Fig. 2 D View Figure 2 ). POD: OD: OOD = 8: 6: 10 (Fig. 2 D, E View Figure 2 ). In dorsal view, arched above eyes, stronger than female (Fig. 2 E View Figure 2 ). In lateral view, eyes: gena = 23: 23, palpi light brown (Fig. 2 C View Figure 2 ). Thorax covered with silvery long setae (Fig. 2 C, E, F View Figure 2 ). Pronotum narrower than female (Fig. 2 C, E View Figure 2 ). Dorsal surface of propodeum delicate and thinner than female, with four longitudinal carinae, without oblique carinae (Fig. 2 F View Figure 2 ). Outside of hind femora spots larger than female (Fig. 2 A View Figure 2 ). Gaster with three segments visible. LT 1: WT 1 = 38: 62. Posterior of T 1 and T 2, most of T 3 with tiny punctures, reminder smooth. S 2 and S 3 scattered with tiny punctures, but S 3 denser, punctures on S 3 converged longitudinally to form rugose towards apex, posterior margin significantly transverse, arched concave (Fig. 2 A, H View Figure 2 ). Genitalia from above, penis valves at apex elongated oval, each half on inner ventral margin serrate, conspicuously short, laterally bulged and meeting in a midline; parameres broad at base, apical part broadly pale and frequently folded over, with few erect bristles at apex. Genitalia from beneath, each half of parameres scattered with short bristles; digitus and cuspis of volsella at apex fuscous, digitus produced vertically like a short, thick bill (Fig. 2 I – K View Figure 2 ).

Distribution.

China ( Guangdong, Jiangxi, Yunnan).

Etymology.

The specific name albipedigerus is derived from the Latin stem alb - (= white) and the Latin word pedigerus (= ped), which refers to the leg with ivory-white spots.