Ourapteryx zhui, Cheng & Wen & Han, 2025

Ourapteryx zhui sp. nov.

Corresponding to sp 4 in Cheng et al. (2025b).

Chinese common name: ƗDzƪkš

( Figs 21–22 View FIGURES 21–28 , 45–46 View FIGURES 45–60 )

Material examined. Holotype, ♂, China: Guangxi ( IZCAS): Maoershan, Antangping , 1579 m, 17–18.VIII.2012, leg. Chao YANG, slide no. Geom-2833, IOZ LEP M 7669 . Paratypes. China: 1♂, same locality, same collector, slide no. Geom-4413, IOZ LEP M 6457 .

Diagnosis. This species is similar to O. latimarginaria Leech, 1897 ( Figs 23–26 View FIGURES 21–28 , 47–50 View FIGURES 45–60 ) and can be distinguished by the narrower postmedial line of the forewing, and extremely slender and long furca. The male genitalia of this species are also similar to those of O. stueningi Inoue, 1993 ( Figs 51–52 View FIGURES 45–60 ) for sharing a long and slender furca; however, the furca of O. zhui sp. nov. is straighter, and this species is much smaller than O. stueningi ( Figs 27–28 View FIGURES 21–28 ) (possible the largest Ourapteryx species, the male forewing length: 37–38 mm).

Description ( Figs 21–22 View FIGURES 21–28 ). Head. Antennae dorsally dark grayish-brown; frons and labial palpus yellowish-brown; vertex white.

Thorax. Dorsal side of thorax, and wings white, patagia tinged pale yellow laterally. Fore- and median legs white; tibia and first tarsomeres with black spots; distal part of femur black; inner side of foreleg tibia dark grey; hind leg white, without any dark markings. Wings. Broad and ground color dull white. Forewing length: ♂ 30 mm. Both wings with black terminal lines, thin and discontinuous; fringes with basal half orange-red, distal half dark grayish-brown, white at anal angles of both fore- and hind wings, upper margin of hind wing shoulder angle, and tip of tail. Forewing with costal black from base to antemedial line; a large dark brown patch at apex, tapering downward near anal fold; area below costa sparsely scattered with uneven short black transverse streaks from base to postmedial line; antemedial and postmedial lines dark grayish-brown tinged yellowish-brown; discal spot dark grayish-brown, anterior end black and reaching costa, posterior end extending to lower angle of cell, tinged with distinct yellowish-brown; area between postmedial line and termen densely decorated with fine dark grayish-brown striations; outer margin slightly arched. Hind wing with postmedial line dark grayish-brown, extending obliquely from upper angle of cell to near termen at CuA 2; distal area between Rs and CuA 2 suffused with uneven pale yellowish-brown and grey fine striations; sparse black scales distally scattered on both sides of vein 2A; tail base bearing two patches flanking M 3: upper patch orange-red with black rim, lower patch black (sometimes intermixed with sparse orange-red scales), the two patches usually accompanied by a small black dot above and below; outer margin straight from apex to above M 1, angulated above M 1 forming a distinct shoulder angle, convex at end of M 3 and forming a tail (length 3–4 mm), below which weakly sinuate to anal angle. Underside. Wings white, markings paler than upperside; lacking yellowish-brown or orange-red on both wings; forewing with large dark brown patch on apex, tapering to anal fold, discernible as silver-grey on upperside.

Abdomen. Abdomen white, without setal comb on male third sternite.

Male genitalia ( Figs 45–46 View FIGURES 45–60 ). Uncus triangular at base with slightly protruding lower corners, distal half short and spine-like. Socii small and membranous. Gnathos with median process shovel-shaped, width slightly broader than length, lateral arms with basal part slightly protruding. Furca developed on right side, extremely slender, slightly curved, extending to middle of uncus, tip slightly swollen with internal sclerotized spines. Saccus semicircular, small. Valva simple, uniform in width; costa more sclerotized, distal margin with a row of long downward-projecting setae, membranous outer margin slightly concave; sacculus shallowly curved. Aedeagus cylindrical, uniform in width; cornuti consisting of a dense cluster of fine hair-like spines.

Female genitalia. Unknown.

Distribution. China ( Guangxi).

Etymology. The species is named after the renowned entomologist Zhu Hongfu.

Remarks. The genitalia of two male specimens (BMNH slide no. 14195 from Hunan, China and ZFMK slide no. 10001 from Yunnan, China) appear consistent with those of this species, but due to the lack of molecular data and the geographical distribution differing from that of this type specimen, we cannot confirm their identity.