Eversmannia zhangorum, Han & Han, 2025

Eversmannia zhangorum sp. nov.

Figs 13 View Figures 1–14 , 14 View Figures 1–14 , 21 View Figures 15–21 , 28 View Figures 22–28 , 38 View Figures 29–39 , 39 View Figures 29–39

Material examined.

Holotype: China – Chongqing City • ♂; Simianshan National Nature Reserve ; 19 Aug. 2021; C. Zhang & XY. Zhang & L. Luo leg.; genit. prep. hmx- 249-1: NEFU . Paratype: China – Guizhou Prov. • 1 ♀; Zunyi City, Shierbeihou Scenic Spot ; 3–5 Aug. 2020; HL. Han & J. Wu leg.; genit. prep. hmx- 124-2; NEFU .

Diagnosis.

This new species is similar to E. fuscifrons but can be distinguished from the latter by the following characters: (1) forewing: the postmedial line with a black spot at the middle; in E. fuscifrons , postmedial line without spot; (2) male genitalia: gnathos spear-shaped; in E. fuscifrons , gnathos spine-shaped; (3) female genitalia: signum reniform with one edge serrate; in E. fuscifrons , signum star-shaped.

Description.

Adult (Fig. 13 View Figures 1–14 , 14 View Figures 1–14 , 38 View Figures 29–39 , 39 View Figures 29–39 ). Forewing length: 8.5 mm in male, 9.0 mm in female. Head: white; labial palpus up-curved, brown; antennae filiform. Thorax: patagium and tegula white. Abdomen: covered with white scales. Forewing: ground color white, with dark-brown patches on costal margin area; antemedial line pale brown, discontinuous; medial line absent; postmedial line pale brown, discontinuous, outward-curved on costal margin region, then inwardly curved to inner margin, with a large black spot at middle. Hindwing white; antemedial line pale brown, discontinuous; postmedial line double, rust-colored, wavy, prominently excurved at M 3, inner side with a crescent-shaped spot at middle; marginal shade brownish red, mixed with dark brown in posterior half; Rs and M 3 with tails at outer margin; terminal line present as a small dot at M 3 - Cu 1.

Male genitalia (Fig. 21 View Figures 15–21 ). Uncus long, hook-shaped, strongly sclerotized. Tegumen triangular, approximately equal to length of uncus. Gnathos sclerotized, spear-shaped, present as two blades, apex pointed. Valva bar-shaped, covered with dense hair; sacculus arcuate, about 1 / 3 as long as valva; editum-costa complex bifurcate, one branch short and finger-shaped, apex rounded, covered with hair, other branch long and bar-shaped and extending before cucullus; costa with a small bulge in middle; cucullus rounded, apex slightly shrunken. Juxta missing. Vinculum broad and U-shaped. Saccus small and V-shaped. Aedeagus cylindrical, distally curved. Vesica membranous, cornutus absent.

Female genitalia (Fig. 28 View Figures 22–28 ). Papilla analis hoof-shaped, densely covered with short setae. Apophysis posterioris slender, approximately 2 × the length of apophysis anterioris. Ostium bursae funnel-shaped, sclerotized. Ductus bursae slender, membranous, approximately 1.5 × length of corpus bursae. Corpus bursae membranous, oval, densely covered with graniculi, signum reniform, with serrate on one edge.

Distribution.

China ( Zhejiang, Hunan, Chongqing, Guizhou) (Fig. 40 View Figure 40 ).

Etymology.

This species is dedicated to Mr Chao Zhang and Ms Xin-Yu Zhang, who collected the holotype.