Diduga hainanensis Bayarsaikhan, Li & Bae, 2020

Diduga hainanensis Bayarsaikhan, Li & Bae , n. sp.

(Figs 4, 14)

Type materials. Holotype: ♂, China, Yinggeling ( 19.05°N, 109.57°E), Hainan Province, 623m, 04.I.2018 (leg. Mujie Qi & Shuai Yu), Gen. Slide No. INU˗10077 China, Bayarsaikhan ( Coll. NKU) GoogleMaps . Paratype. ( 1♂) China: 1♂ , Yinggeling ( 19.05°N, 109.57°E), Hainan Province, 623m, 07.I.2018 (leg. Mujie Qi & Shuai Yu), Gen. Slide No. INU˗10092 GoogleMaps China, Bayarsaikhan ( Coll. NKU) .

Diagnosis. The male genitalia structure of the new species is similar with Diduga quinquicornuta ( Bayarsaikhan & Bae, 2019: fig. 12; present paper: fig. 14c), but can be distinguished from the latter by the more stout, long (towards apex of uncus) basal saccular process of left valva with rounded apex; apex of right valva strongly bifurcated, which lower and upper angle’s processes irregularly truncate, dentate margin. In D. quinquicornuta , slender, short (towards apex of tegumen) basal saccular process of left valva with angled apex; apex of right valva strongly four branched, which processes variously spine˗shaped ( Fig 14c View FIGURE 14 ).

Description. Adult (Figs 4a, 4b). Length of forewing 7 mm in both sexes. Head, patagium and tegula deep yellow. Thorax dark brown. Forewing ground color dark brown, with broad, deep yellow costal margin, which hind border broadly waved; with row of small, dark brown dots or patches from basal of costa to tornus; cilia deep yellow. Hindwing ground color pale brown; cilia pale brown. Abdomen brown, except deep yellow ventral, with deep yellow anal tuft in male. Male genitalia ( Fig 14a View FIGURE 14 ). Uncus stout, tapering, with apex strongly angled, heavily covered with setae. Tegumen triangular, weakly sclerotized. Valvae asymmetric: in left valva, short (almost same length with tegumen), irregularly triangular, with waved four diverse sized (among them one bifurcated), strongly sclerotized processes; cucullus membranose, club˗shaped, with costal sclerotized area; long (towards apex of uncus) basal saccular process of left valva with rounded, dentate apex; in right valva, square, almost same sized with left valva, with rectangular upper one and irregularly triangular lower one processes strongly sclerotized, dentate margin; cucullus membranose, club˗shaped. Juxta triangular. Saccus broadly “U”˗shaped. Aedeagus stout, weakly sclerotized and vesica with a large spine˗shaped cornutus and scobination. Female genitalia ( Fig 14b View FIGURE 14 ). Papillae anales weakly covered with setae. Asymmetrical ostial plate strongly sclerotized: left plate with strongly waved left and irregularly arch˗shaped right plates, both side covered with small spines wholly. Ductus bursae tubular, membranous, with strongly sclerotized band. Corpus bursae ovoid, heavily covered with dense spinulose scobination.

Distribution. China ( Hainan).

Etymology. The species is named for the type locality, Hainan Prov., China.