Ripeacma apicilispina Wang, 2022

Ripeacma apicilispina Wang , sp. nov.

( Figs 4 View FIGURES 3–8 , 16 View FIGURES 15–20 )

Type material. CHINA, Hubei: Holotype ♂, Quanxi Town ( 32.03°N 109.69°E), Zhuxi County, 868 m, 9.VII.2017, leg. WD Qi et al., slide No. XZX20323. GoogleMaps

Diagnosis. The new species is similar to R. bicruris Wang & Li, 2003 in male genitalia. It can be distinguished by the broad triangular saccus, and the aedeagus has an apical spine. In R. bicruris , the slender saccus is sub-digitate, and the distally bilobed aedeagus lacks an apical spine.

Description. Adult ( Fig. 4 View FIGURES 3–8 ). Wingspan 10.0 mm.

Head pale yellow, vertex mixed with black scales. Labial palpus in male yellow, second palpomere with black scales distally. Antenna yellow; flagellum ringed with brown on dorsal surface.

Thorax and tegula black basally, yellow distally. Forewing yellow, with black scales; costal margin dark brown from base to basal 1/3, forming a dark band widened toward apex, diffused dark brown spot from between basal 2/5 and distal 1/3 to anterior margin of cell, darker at each side, three small dark brown dots in distal 1/4; terminal dots black, running along termen to tornus; discal, discocellular and plical stigmata black, discocellular stigma doubled, closely placed one above the other; dorsum with a black spot at base; fringe yellow, except on extension of black marginal dots. Hindwing and fringe dark brown. Legs yellow; on dorsal surface, femur of foreleg black, tibia black, ringed with yellow at basal 1/3, at middle and at apex, tarsus black at middle of first tarsomere and at base of second tarsomere as well as on entire third and fourth tarsomeres; tibia of midleg black, with yellow speckle at basal 1/3, at middle and at apex, tarsus black at middle of first tarsomere and at base of other tarsomeres; femur of hindleg with black scales, on outer surface, tibia of hindleg black, tarsus black at middle of first tarsomere and at base of second tarsomere.

Male genitalia ( Fig. 16 View FIGURES 15–20 ). Uncus sub-trapezoidal, shrunk near apex laterally, mushroom-like apically, with a few setae beyond middle laterally. Gnathos with ventral plate horizontally straight, narrowly banded, slightly widened anteriorly, pointed at each tip; basal arm banded, as long as width of ventral plate. Tegumen quadrate posteriorly, with a semicircular anterior emargination; lateral arm shorter than median width. Valva narrowly elongate, slightly widened from near base to before obtusely rounded apex, with setae from basal 1/5 to 1/2 above ventral margin; costa narrowly banded, reaching beyond middle of costal margin; transtilla lobes expanded near middle, weakly joined mesially; sacculus triangular, with sparse long setae at apex. Saccus triangular, apex narrowly rounded. Juxta U shaped; lateral lobes broadly banded, slightly narrowed to finely serrate apex. Aedeagus as long as valva, with an apical spine.

Female unknown.

Distribution. China ( Hubei).

Etymology. The specific epithet is derived from the Latin apicalis and s pina, referring to the apical spine of the aedeagus.