Ourapteryx parainouei, Cheng & Wen & Han, 2025

Ourapteryx parainouei sp. nov.

Corresponding to sp 3 in Cheng et al. (2025b).

Chinese common name: Ǐ井上ǟnă

( Figs 5–6 View FIGURES 1–20 , 33–34 View FIGURES 29–44 )

Material examined. Holotype, ♂, Vietnam: Ha Giang ( IZCAS), 18–20.VI.2015, slide no. Geom-7206, IOZ LEP M 50009 View Materials .

Diagnosis. This species is externally similar to O. angusta sp. nov. ( Figs 3–4 View FIGURES 1–20 , 31–32 View FIGURES 29–44 ) and O. inouei Stüning, 2000 ( Figs 7–8 View FIGURES 1–20 , 35–36 View FIGURES 29–44 ), but can be distinguished by the longer tail at the end of vein M 3 on the hind wing, which also bears an oval greyish patch. Additionally, the frons is brown, whereas in O. angusta sp. nov. and O. inouei , it is black and white, respectively. In the male genitalia, the furca differs in shape: in O. parainouei sp. nov. and O. angusta sp. nov., it is narrower at the base and broad distally, whereas in O. inouei , the furca is uniformly wide throughout its length. The valva of O. parainouei sp. nov. is more elongated than in the other two species. Furthermore, cornuti of the aedeagus in O. angusta sp. nov. is the stoutest among the three species.

Description ( Figs 5–6 View FIGURES 1–20 ): Head. Antennae brown, dorsally white, basal segments white; frons brown on upper one-third, white on lower two-thirds; labial palpus brown, ventral side and tip of second segment dirty white; vertex white.

Thorax. Dorsal side of thorax white. Legs white; all legs with inner side of femur, apex and inner side of tibia dark brown. Wings. Broad and somewhat greyish white. Forewing length: ♂ 23 mm. Forewing with costal area sparsely infused with short black streaks, wing surface unevenly covered with diffuse pale grayish-brown striations; antemedial and postmedial lines grayish-brown, former being obliquely straight and latter curved, outer half of antemedial line and discal spot, and inner half of postmedial line tinged with pale yellowish-brown; discal spot short, not reaching lower angle of cell; outer margin nearly straight. Hind wing with medial line sharply oblique extending below the upper angle of cell towards outer margin near anal fold, submarginal area suffused with pale grayish-brown striations except at apex; outer margin slightly arched above M 1, tail short, about 1.5 mm in length, shoulder weak and small; basal area of tail bears an elongated, oval greyish patch with two distinct yellowish brown spots, the larger situated above the M 3 vein and the smaller below it. Terminal lines of both wings blackish-brown, fringes grayish-brown, basal half mixed with uneven yellowish-brown; terminal lines and fringes white at apex and anal angle. Underside. White, transverse lines and discal spot on both wings indistinct; forewing features a sparsely but distinctly scattered dark grayish-brown scales near apex, hind wing similarly scaled but distally.

Abdomen. Abdomen white, with setal comb on male third sternite.

Male genitalia ( Figs 33–34 View FIGURES 29–44 ). Uncus bell-shaped, with small triangular projections at base, upper half fingerlike with rounded apex. Socii minute extended and membranous. Gnathos with median process small, tongue like, and spinulose. Furca club-shaped, arising more or less right side, length almost reaching the base of costa, apex and inner margin bearing dense spines. Saccus semicircular. Valva simple, elongate, apex slightly narrower with tip rounded; costa with small protrusions at basal and distal one thirds respectively; sacculus slightly convex medially. Aedeagus cylindrical, short and stout, slightly swollen medially; cornuti consisting of over a dozen small spines of varying lengths, some approaching or exceeding aedeagus diameter.

Female genitalia. Unknown.

Distribution. Vietnam.

Etymology. The specific name is derived from the Latin prefix para-, and is used to indicate a high morphological similarity with O. inouei .