Nosphistica subrectangula Yu et Wang, 2019

Yu, Shuai & Wang, Shuxia, 2019, Taxonomic study of the genus Nosphistica Meyrick, 1911 (Lepidoptera Lecithoceridae) from China, with descriptions of seven new species, Zootaxa 4664 (4), pp. 497-517 : 508-509

Nosphistica subrectangula Yu et Wang , sp. nov.

( Figs 2, 3 , 4 )

Type material. CHINA, Hainan Province: Holotype ♂, Tianchi, Jianfengling , Ledong County 787 m, 7.III.2016, leg. Qingyun Wang, Suran Li & Shengnan Zhao, slide No. YS 17085 . Paratypes (3♂, 1♀): 1♀, 8.III.2016, other same data as holotype, slide No. YS17140 ; 1♂, 1050 m, 29.IV.2013, same locality as holotype, leg. Yinghui Sun, Tengteng Liu & Wei Guan, slide No. LSR13226 ; 1♂, Jianfengling , Ledong County, 12-14.IV.2009, leg. Min Wang et al., slide No. YS 18080 ; Guangdong Province: 1♂, Mt. Dadong , Lian County, 5.VII.2008, leg. Fengxia He, slide No. LSR13160 .

Diagnosis. This species can be distinguished from its congeners superficially by the subterminal line on the hindwing distinctly widened posteriorly, and by the juxta having large sub-rectangular lateral processes in the male genitalia.

Description. Adult ( Fig. 2 ) wingspan 16.0–20.0 mm.

Head pale orange. Antenna pale orange; scape elongate; flagellum annulated with dark brown dorsally. Labial palpus pale orange; second segment thickened, mixed with dark brown scales; third segment slender, approximately as long as second segment.

Thorax and tegula pale orange, mixed with dark brown scales. Forewing with costal margin slightly arched, apex triangularly produced, termen broadly concave; ground color dark brown, mixed with orange-white scales, orange yellow mottled dark brown below costal margin from base to apex; large dark brown patch at basal 1/3, narrowed anteriorly, from dorsum reaching to upper margin of cell, its lower margin occupying 1/6 length of dorsum, outer margin edged with white scales; discocellular stigma spatulate, dark brown, edged with orange-white scales; narrow, orange-yellow stripe from before discocellular stigma oblique to dorsum before tornus; subterminal line orange white, extending inward from distal 1/4 of costal margin to dorsum and touching aforementioned stripe, angled outward medially; terminal line dark brown; fringe orange white basally, pale yellowish brown medially, dark brown terminally and around tornus. Hindwing with costal margin straight, apex sharply acute, termen sinuate twice; ground color pale greyish brown except dark brown between discocellular stigma and subterminal line; area between subterminal line and terminal line white with scattered dark brown scales; area between 3A and dorsum blackish brown, interrupted by a white patch; pale orange scales along veins Rs and M 1, becoming denser and forming a stripe distally; discocellular stigma comma-shaped, dark brown, surrounded by white scales; subterminal line white, from beyond distal 1/3 of costal margin oblique to tornus, distinctly widened posteriorly; terminal line dark brown; fringe orange white basally and pale orange mixed with dark brown distally along termen, pale orange alternated with dark brown along dorsum except basal 1/4 dark brown mixed with pale orange. Legs pale orange, mixed with dark brown scales on femora and tibiae, denser ventrally; mid tibia roughly scales; hind tibia covered with dense long scales.

Male genitalia ( Fig. 3 ). Uncus flabellate, setose distally; posterior margin arched, about 2.5 times width of anterior margin; anterior margin emarginated medially. Gnathos with lateral arms broad, fused medially, obtuse posteriorly; median process broad at base, gradually narrowed to pointed apex, curved. Valva broad at base, gently narrowed to about middle, then subparallel to before obliquely obtuse apex, setose distally; sacculus broad basally, gradually narrowed to 3/5 length of ventral margin of valva. Juxta with basal half nearly inverted trapezoidal, concave laterally, distal half membranous, trapezoidal, triangularly produced antero-medially; lateral process arising from about middle, about 1/4 length of juxta, large sub-rectangular, distinctly wider than long, concave bilaterally, setose distally. Vinculum broad, obtuse anteriorly. Aedeagus longer than valva, uniform, gently curved; cornuti consisting of two heavily sclerotized dentate distal sticks about 1/3 length of aedeagus, and numerous, deciduous, differently sized conic spines ranging from basal 1/4 to distal 1/4, and a row of thumbtack-shaped dorsal spines ranging from middle to distal 1/4.

Female genitalia ( Fig. 4 ). Abdominal sternite VIII deeply incised at middle on posterior margin. Apophyses anteriores about 2/3 length of apophyses posteriores, with a small median furcation. Antrum transversely banded, wider than long, widened medially. Ductus bursae narrow, approximately 1/3 length of corpus bursae; ductus seminalis much slender, arising from about anterior 1/6 of ductus bursae. Corpus bursae large ovate; with two signa, at middle of corpus bursae: one large elliptical, with a heavily sclerotized horizontal ridge along midline; another relatively small, sub-elliptical, with dense denticles.

Distribution. China (Guangdong, Hainan).

Etymology. The specific epithet is derived from the Latin sub- and rectangulus (= rectangular), referring to the sub-rectangular lateral processes of the juxta in the male genitalia.

Figures

FIGURE 4. Female genitalia of N. subrectangula sp. nov., paratype, slide No. YS17140. Scale=0.5 mm

FIGURES 2‒3. Nosphistica subrectangula sp. nov. 2. adult, holotype, ♂; 3. male genitalia, paratype, slide No. LSR13160. Scales: 2=2mm, 3=0.5 mm