Meleonoma curvicornuta, Zhu & Wang, 2022

Zhu, Xiaoju & Wang, Shuxia, 2022, Taxonomy of the genus Meleonoma Meyrick, 1914 (Lepidoptera: Autostichidae) from China (IV), with descriptions of twelve new species, Zootaxa 5087 (4), pp. 501-521 : 511-513

Meleonoma curvicornuta sp. nov.

( Figs 10 , 22 , 32 )

urn:lsid:zoobank.org:act:BD342CBB-4814-491F-B3CC-05BFCFD6A007

Type material. CHINA, Xizang: Holotype ♂, Beibeng Town (29.25°N, 95.18°E), Motuo County, 810 m, 13.VIII.2017, leg. MJ Qi & XF Yang, slide No. ZXJ19352 . Paratypes: 10♂ 5♀, 810‒987 m, 12‒15.VIII.2017, other same data as holotype, slide Nos. ZXJ19583 ♀, TZL19374 ♂, TZL19405 ♀; 4♂, Yadong Village , Motuo County, 833 m, 16.VIII.2017, leg. MJ Qi & XF Yang, slide No. ZXJ19353 ; 5♂ 7♀, Dexing Village , 833 m, 18.VIII.2017, leg. MJ Qi & XF Yang, slide No. ZXJ19618 ♀; 1♂, 80 K, Motuo County, 2089 m, 19.VIII.2017, leg. MJ Qi & XF Yang, slide No. ZXJ19588 .

Diagnosis. The new species can be distinguished from other species of the group in the male genitalia by the transtilla with a curved spine-shaped process arising from the ventroapical corner, the sacculus with a sub-digitate apical process curved obliquely downward, and the S-shaped cornutus longer than half the length of the aedeagus; in the female genitalia by the broad ovate lamella antevaginalis.

Description. Adult ( Fig. 10 ). Forewing length 6.5–7.0 mm.

Head with vertex yellowish brown; frons yellow. Labial palpus yellow; first and second palpomeres yellowish brown on outer surface, second palpomere with a black ring at apex; third palpomere with sparse yellowish-brown scales on outer surface, 2/3 length of second palpomere. Antenna yellowish brown on dorsal surface, yellow on ventral surface.

Thorax and tegula yellowish brown. Forewing yellowish brown, with blackish-brown scales; discal and discocellular spots black, at distal 2/5 and at outer margin of cell respectively, the former rounded, the latter banded; plical spot black, rounded, at distal 2/5 of fold; costal margin with black dots running from about middle to apex, becoming smaller; terminal dots black, extending along termen to tornus; fringe concolorous with wing. Hindwing and fringe greyish brown. Legs yellow; on ventral surface, coxa of foreleg with scattered blackish-brown scales, femur and tibia blackish brown except tibia yellow apically, tarsus blackish brown except yellow at base of basal tarsomere as well as at apices of basal two and apical one tarsomeres, femur of midleg blackish brown apically, tibia blackish brown except yellow at middle and at apex, tarsus with basal four tarsomeres blackish brown except yellow at apices, hindleg with scattered greyish-black scales.

Male genitalia ( Fig. 22 ). Uncus wide at base, slightly narrowed to narrowly rounded apex. Tegumen almost evenly banded; lateral arm rounded at apex. Valva with basal 2/5 narrow, parallel sided, widened from basal 2/5 to before rounded apex, with a setose patch at basal 2/5 and a few large or small verrucous processes; ventral margin sclerotized along basal 2/5, forming a sclerotized band extended obliquely upward to outer margin of setose patch; costa wide at base, narrowed to tip of costal margin; transtilla heavily sclerotized, dentate apically, with a curved spine-shaped process arising from ventroapical corner reaching 4/5 length of costal margin. Sacculus fused with valva basally, concave dorsoapically, apex with a sclerotized sub-digitate process obliquely curving downward; ventral margin folded dorsad, forming an uniform ventral band. Saccus broad triangular, wide at base, narrowed to rounded apex, as long as uncus. Juxta V-shaped, concave at middle on posterior margin. Aedeagus as long as valva, inflated distally, with irregular sclerites in distal half and a small apical spine; cornutus spine-shaped, curved in Sshape, longer than half length of aedeagus.

Female genitalia ( Fig. 32 ). Papilla analis quadrate, setose on dorsal surface. Apophyses posteriores 2.5 times as long as apophyses anteriores. Eighth tergite trapezoidal, obtuse on posterior margin, straight on anterior margin. Eighth sternal plate spiculate; slightly concave medially and lined long setae on posterior margin. Lamella antevaginalis broad ovate, surrounding ostium bursae. Antrum widened posteriorly, produced posterolaterally. Ductus bursae sclerotized in posterior 3/4, membranous in anterior 1/4; ductus seminalis arising from near entrance of corpus bursae. Corpus bursae sub-rounded; with two maple leaf-shaped signa bearing dense teeth.

Distribution. China (Xizang).

Etymology. The specific epithet is derived from the Latin curvus and cornutus, referring to the slightly curved cornutus of the aedeagus.

Figures

FIGURES 10−15. Adults of Meleonoma spp. 10, M. curvicornuta sp. nov., holotype, ♂; 11, M. dilatilobata sp. nov., holotype, ♂; 12, M. globulosa sp. nov., holotype, ♂; 13, M. prospina sp. nov., paratype, ♀; 14, M. sinuata sp. nov., holotype, ♂; 15, M. unijugata sp. nov., paratype, ♂. Scale bars = 2.0 mm.

FIGURES 22−27. Male genitalia of Meleonoma spp. 22, M. curvicornuta sp. nov., paratype, slide No. TZL19374; 23, M. dilatilobata sp. nov., holotype, slide No. ZXJ19366; 24, M. globulosa sp. nov., holotype, slide No. ZXJ19354; 25, M. prospina sp. nov., paratype, slide No. ZXJ19381; 26, M. sinuata sp. nov., holotype, slide No. ZXJ19361; 27, M. unijugata sp. nov., holotype, slide No. ZXJ19362. Scale bars = 0.5 mm.

FIGURES 32−35. Female genitalia of Meleonoma spp. 32, M. curvicornuta sp. nov., paratype, slide No. ZXJ19583; 33, M. dilatilobata sp. nov., paratype, slide No. ZXJ19625; 34, M. globulosa sp. nov., paratype, slide No. ZXJ19582; 35, M. prospina sp. nov., paratype, slide No. ZXJ18291. Scale bars = 0.5 mm.