Nemophora mediseorsa, Sun & Li, 2023

Sun, Hao & Li, Houhun, 2023, Taxonomy of the mediseorsa species group of the genus Nemophora Hoffmannsegg 1798 (Lepidoptera: Adelidae), Zootaxa 5258 (4), pp. 485-494 : 489-493

Nemophora mediseorsa sp. nov.

( Figs 6 , 10 )

urn:lsid:zoobank.org:act:A72CA49F-F933-43A9-849A-CAC13CF7C314

Type material. CHINA, Guangxi: Holotype ♁, Huaping, Yachang , Leye County, 3.V.2007, leg. M Wang, slide SH20197 . Paratype: 1 ♁, same data as holotype .

Diagnosis. The new species can be distinguished by the vinculum having a digitate median process. It is closely allied to N. longissima sp. nov. in the forewing without a black speckle between M 2 and the termen beyond the outer fascia, and in the phallus without a process in the male genitalia. The differences between the two species are stated in the diagnosis of the latter species.

Description. Adult ( Fig. 6 ). Male wingspan 13.0‒14.0 mm.

Head:Vertex yellowish brown; frons purple. Eye interocular index 0.48‒0.52. Proboscis yellowish brown. Labial palpus 0.63‒0.67 × vertical eye diameter; brown, with black hairs. Antenna 3.4‒3.8 × length of forewing; scape golden yellow ventrally, purplish brown dorsally; flagellum grayish brown except basal 1/5 yellowish brown.

Thorax: Mesonotum golden yellow; tegula purplish bronzy. Forewing ground color golden yellow except distal 1/5 purplish bronzy with metallic luster; black speckle from base to basal 1/5, radiating to near basal 2/5 of wing by several black streaks; purplish bronzy band to basal 2/5 along posterior margin of cell; three black streaks below purplish bronzy band: first streak to near basal 2/5 along CuP, second streak to basal 1/3 along 1A+2A, third streak to basal 1/3 of dorsum; inner and outer fasciae silvery gray, with bronzy luster, edged with brown: inner fascia slightly arched outward, outer fascia curved inward and separated by brown scales medially; medial fascia yellow, narrowed medially; black streaks radiating from outer fascia to distal 1/5 of wing; fringe grayish brown. Hindwing and fringe grayish brown. Foreleg yellow ventrally, purplish bronzy dorsally; midleg brownish yellow; hindleg pale yellow. Epiphysis gray, at middle of tibia, reaching apex of tibia.

Abdomen: Dark brown.

Male genitalia ( Fig. 10 ). Socius reniform, length 1.9 ×width.Uncus sub-trapezoidal, sinuate anteriorly, maximum width 2.1 times length. Tegumen with distinct median ridge. Valva fused for basal half, gradually narrowed to rounded apex, slightly concave medially on costal margin; sacculus reaching distal 1/5 of ventral margin. Transtilla with a semicircular anterior emargination; median process digitate, reaching posterior 2/5 of tegumen apically. Vinculum 2.5 × length of valva, broadly rounded anteriorly. Phallus 1.2 × length of vinculum, with belt of spines from near distal 2/5 to 1/9 ( Fig. 10a ). Juxta 0.56 × length of phallus; lateral arm 0.24 × length of arrow head.

Female unknown.

Distribution. China (Guangxi).

Etymology. The specific epithet is derived from the Latin med- and seorsus, referring to the medially separated outer fascia of the forewing.

Figures

FIGURES 1‒6. Adults of Nemophora spp. 1, N. mediangusa sp. nov., holotype, ♁; 2, N. longiuga sp. nov., holotype, ♁; 3, N. longiuga sp. nov., paratype, ♀; 4, N. longissima sp. nov., holotype, ♁; 5, N. longissima sp. nov., paratype, ♀; 6, N. mediseorsa sp. nov., holotype, ♁. Scales = 5.0 mm.

FIGURES 7‒10. Male genitalia of Nemophora spp. 7, N. mediangusa sp. nov., slide No. SH19105; 8, N. longiuga sp. nov., slide No. SH20255; 9, N. longissima sp. nov., slide No. SH20248; 10, N. mediseorsa sp. nov., slide No. SH20197.All holotypes. 7a‒10a, enlarged distal part of phallus. 9b, transtilla, slide No. SH20336. Scales = 0.2 mm, 7a‒10a = 0.1 mm, 9b = 0.2 mm.