Nemophora recurvatifera Sun, Wang et Li, 2022

Sun, Hao, Wang, Shuxia & Li, Houhun, 2022, Review of the degeerella species group of the genus Nemophora Hoffmannsegg 1798 (Lepidoptera: Adelidae) from China, Zootaxa 5219 (4), pp. 301-338 : 321-322

Nemophora recurvatifera Sun, Wang et Li , sp. nov.

( Figs 20, 21 , 43 , 51 )

urn:lsid:zoobank.org:act:264875EE-1E19-4E32-B96E-3184D4059541

Type material. CHINA, Tibet: Holotype ♂ , Pailong Village , Nyingchi County, 2031 m, 20.VI.2019, leg. MJ Qi & JQ Deng, slide No. SH 20167 . Paratypes: 2♂ 1♀, 20−21.VI.2019, other same data as holotype, slide No. SH 20168 ♀.

Diagnosis. The new species is similar to N.ochsenheimerella (Hübner,[1813]) and N.wakayamensis ( Matsumura, 1931) by the forewing sharing a V-shaped pattern. It can be distinguished by the forewing with a silvery gray streak along the anterior margin of the cell curved downward to CuP apically, and in the male genitalia by the phallus with an apical process curved at a right angle. In N. ochsenheimerella and N. wakayamensis , the forewing has a straight streak along the anterior margin of the cell, and the phallus lacks an apical process in the male genitalia. It can be further distinguished from N. ochsenheimerella by the valva fused for basal 1/3, which is separated basally in N. ochsenheimerella ( Küppers 1980: 277, fig. 78). It can be further distinguished from N. wakayamensis by the tegumen with a distinct median ridge and the phallus with spines from distal 1/4 to 1/ 6 in the male genitalia, and the ductus bursae 0.55 × length of the vestibulum in the female genitalia; in N. wakayamensis , the tegumen lacks a median ridge and the phallus lacks spines in the male genitalia, and the ductus bursae is 2.0 times the length of the vestibulum in the female genitalia ( Ji et al. 2018: 900, figs 1g, 2f, 3d).

Description. Adult ( Figs 20, 21 ). Male wingspan 22.5−24.0 mm.

Head: Vertex yellow; frons purplish gray. Eye interocular index 0.60−0.73. Proboscis brown, with yellow scales in basal 1/4. Labial palpus 1.2−1.3 × vertical eye diameter; yellow, with brown scales.Antenna 3.5−4.0 × length of forewing; scape purplish brown except yellow on anterior margin; flagellum grayish brown except dark brown in basal 1/6.

Thorax: Mesonotum golden yellow except pale yellow laterally; tegula purplish bronzy. Forewing ground color yellowish brown, costal margin black from beyond outer fascia to apex; black spot near base between Sc and posterior margin of cell; four silvery gray streaks edged with black scales: first streak from base to near 2/5 along costal margin, second streak from basal 1/3 to near 3/4 of cell along anterior margin curved downward to CuP apically, third streak from base to 3/5 of cell along posterior margin, fourth streak from near base to 2/5 of wing along 1A+2A, forked basally; five black lines: first line from base to beyond 1/5 of wing between Sc and R 1, second line from base to 2/5 of wing along R 1, third line from base to 3/5 of cell, interrupted from basal 2/5 to middle, fourth line from near base to near 2/5 of wing along CuP, fifth line from base to 1/3 along dorsum; inner and outer fasciae bluish leaden, inner fascia slightly arched outward medially, outer fascia sinuate, extending outward anteriorly and posteriorly, medial fascia golden yellow, narrowed medially, edged with narrow dark yellowish brown bands; bluish leaden V-shaped pattern opening toward base of wing, dorsal arm extending from middle of CuA 1 obliquely outward to R 5, then almost straight to apex, edged with black scales on both margins, ventral arm from apex running along termen to tornus, meeting outer fascia, edged with black scales on inner margin, yellow fusiform patch placed between two arms; fringe brown. Hindwing grayish brown except light brown between costal margin and Rs; fringe brownish yellow. Foreleg with coxa and femur yellow ventrally, purplish brown dorsally, tibia yellow ventrally, bluish brown dorsally, tarsus purplish bronzy except first and second tarsomeres yellow ventrally; midleg with femur yellow, tibia yellow ventrally, bluish purple dorsally, tarsus yellow ventrally, purplish bronzy dorsally; femur of hindleg yellow, tibia yellow except brown apically, tarsus yellow with each tarsomere bronzy apically. Epiphysis black, at distal 1/3 of tibia, reaching near apex of tibia.

Abdomen: Yellow on ventral surface, dark brown on dorsal surface.

Female wingspan 21.0 mm. Antenna same length as forewing, thickened by black scales up to basal 2/3, grayish white distally. Otherwise, similar to male.

Male genitalia ( Fig. 43 ). Socius ovoid, length 1.67 × width. Tegumen with distinct median ridge. Uncus inverted V-shaped. Valva fused for basal 1/3, narrowly rounded at apex, straight on costal margin, obliquely straight on ventral margin; sacculus reaching basal 1/3 of ventral margin. Transtilla with a shallow anterior emargination medially; median process spiniform, reaching posterior 1/3 of tegumen apically. Vinculum 2.4 × length of valva, broadly rounded anteriorly. Phallus almost straight, same length as vinculum, swollen at base, with two rows of minute spines from distal 1/4 to 1/6 and an apical process curved at a right angle preapically ( Fig. 43a ). Juxta 0.69 × length of phallus; lateral arm 0.54 × length of arrow head.

Female genitalia ( Fig. 51 ).Apophyses posteriores slightly longer than apophyses anteriores; apophyses anteriores fused with eighth tergum in posterior 2/5, 1.6 × length of seventh tergum. Eighth tergum triangularly produced anteromedially. Seventh tergum obtusely rounded posteriorly. Vestibulum membranous, with two sclerites: one from middle to distal 2/5, another from distal 2/5 to 1/5. Ductus bursae 0.55 × length of vestibulum, slightly longer than corpus bursae. Corpus bursae elongate ovoid.

Distribution. China (Tibet).

Etymology. The specific epithet is derived from the Latin recurvatus and -fera, referring to the apically curved second silvery streak of the forewing.

Figures

FIGURES 19‒22. Adults of Nemophora spp. 19, N. ravidifera sp. nov., holotype, ♂; 20, N. recurvatifera sp. nov., holotype, ♂; 21, N. recurvatifera sp. nov., paratype, ♀; 22. N. seorsifascia sp. nov., holotype, ♂. Scales= 5.0 mm.

FIGURES 39‒43. Male genitalia of Nemophora spp. 39, N. latirectangula sp. nov., holotype, slide No. SH20091; 40, N. parvaprocessa sp. nov., holotype, slide No. SH19156; 41, N. purpuratifera sp. nov., holotype, slide No. SH19084; 42, N. ravidifera sp. nov., holotype, slide No. SH20109; 43, N. recurvatifera sp. nov., holotype, slide No. SH20167; 39a − 43a, enlarged distal part of phallus. Scales= 0.2 mm, 39a‒43a= 0.1 mm.

FIGURES 51‒52. Female genitalia of Nemophora spp. 51, N. recurvatifera sp. nov., paratype, slide No. SH20168; 52, N. staudingerella, slide No. SH20269. Scales= 0.2 mm.