Thornburghiella singularis

Thornburghiella singularis (Quate, 1962) Fig. 4 A – H Pericoma singularis Quate, 1962: 166 Thornburghiella singularis (Quate, 1962): Duckhouse 1987: 85 Material examined. • 1 ♂, China, Tibet, Nyingchi City, Bayi, 29°38'11.67"N, 94°21'39.93"E, 2989 m a. s. l., 2017. VII. 6, leg. Qicheng Yang. Redescription. Measurements in mm (N = 1). Male. Body length 2.25 mm. Wing length 3.6 mm, width 1.47 mm. Head width 0.61 mm, length 0.54 mm; vertex 0.21 mm. Head. (Fig. 4 C) about the same length as width; vertex about 0.38 times length of head; without ocular setae. Eye bridge of seven facet rows, separated by about 4 facet diameters; interocular suture inverted, broadly V-shaped; frontal scar patch concentrated on inner margin of the antennal socket and extends to interocular suture. Antennae (Fig. 4 D) 16 segments, scape length 0.3 mm, about 3 times longer than wide, distally widened; pedicel rounded, length 0.058 mm, width 0.066 mm; flagellomere 1 length 0.13 mm, bearing row of 7 strong spines. Basal-most spine is designated as the first spine, with successive lengths as follows: 1: 0.07, 2: 0.08, 3: 0.09, 4: 0.1, 5: 0.11, 6: 0.14, 7: 0.22. The 7 th spine is longest, at 3.1 times length of 1 st spine; flagellomeres 2–13 fusiform, swollen at middle and narrowed distally; rounded flagellomere 14 with an extension at the distal half; ascoids short, length of antennae segments 1–16: 0.3: 0.06: 0.13: 0.04: 0.04: 0.04: 0.04: 0.04: 0.04: 0.04: 0.04: 0.04: 0.04: 0.03: 0.02: 0.06; Clypeus margin slightly flat, clypeus scar patch no more than half of clypeus. Palp segment proportions 1: 1.7: 1.8: 2.6. Thorax with brown allurement organs from the prothorax (Fig. 4 F), the distal end is slightly swollen in lateral view, with a setose surface and rugose at the base; epimeron, anepisternum and katepisternum smooth, anepimeron basal and medial half setae. Wing (Fig. 4 B) light brown; vein R 5 situated below the apical angle of the wing; dark brown spots present at the terminal junctions of all veins (except Sc) with the wing margin; medial fork and radial fork are situated in the mid-wing region, with the medial fork positioned slightly more basally, with the medial fork slightly separated and the radial fork complete. Terminalia. (Fig. 4 F – H). Ejaculatory apodeme length 0.29 mm, base narrow, long, broad at apex. Aedeagus apex sharply pointed, sword-shaped, surrounded by a translucent sac-like membrane; hypandrium slender, band-shaped, widened medially and bifurcate. Gonocoxite with many scar patches at apex margin, length and width nearly equal; gonostyli length 0.39 mm, 2.43 times the length of gonocoxite bearing multiple minute spines medially and a single barbed branch subapically, apex sharply pointed. Epandrium rectangular, width 1.25 times the length, with scar patches near the base, 2 pseudospiracular openings of epandrium small, irregular; hypoproct wide and long in posterior view, subrectangular; surstylus approximately 0.36 mm in lateral view, base slightly widened, apex slender; apex bearing approximately 20–25 tenacula distally, tenacula slender, varying in length, clustered, subtranslucent, the longest about 0.21 mm, the shortest 0.02 mm. Distribution. China (Tibet); India. Remarks. This specimen agrees with the original description in Quate (1962) of the species in all critical features: eye bridge with seven facet rows; first flagellomere bears a row of seven strong spines; thorax with large allurement organs; brown spots at the apices of wing veins; aedeagus long, spear-like; and gonocoxite bearing multiple minute spines medially. Only the shape of the hypandrium differs slightly. It is therefore confirmed as the same species and represents the first record of this species from China.