Thylacosceloides, Sinev, 1988

Guan, Wei & Wang, Shu-Xia, 2015, New record genus Thylacosceloides Sinev (Lepidoptera: Stathmopodidae) in China, Zoological Systematics 40 (1), pp. 99-102 : 101-102

Thylacosceloides miniata Sinev, 1988 ( Figs 1−6 )

Thylacosceloides miniata Sinev, 1988: 129.

Material examined. 2♂, Shaliangzi, Zhouzhi County, Shaanxi Province (elev. 1 000 m), 23 September 1987, coll. Hou- Hun Li , genitalia slide nos. GW13018, GW13021 ; 1♀, Linjiang, Xishui , Guizhou Province (elev. 550 m), 26 August 2001, coll. Hai-Li Yu, genitalia slide no. GW13020 .

Description. Adult ( Fig. 3 ). Wing expanse 9.0– 9.5 mm. Head pale brown, with metallic luster; frons slanting backward; occiput broad, shiny brown, centrally with a broad longitudinal groove in male. Antenna shiny brown; scape long clubbed, constricted at base, slightly compressed; flagella filiform. Labial palpus with first and second segments ivory, third segment pale brown. Thorax and tegula dark brown, with metallic luster. Forewing dark brown, with purple metallic luster; costal margin with an obscure ivory wedge-shaped spot at distal 1/5, crossing 1/3 of wing, ventral margin with an obscure ivory olivary spot at 1/3, crossing 1/5 of wing; cilia brown. Hindwing shiny brown, cilia pale brown. Legs shiny ivory, fore tibia and tarsus pale brown on outer side; midleg with apex of tibia and tarsus pale yellow; hind tibia with long sparse brown hairs on basal half, with long dense triangular (lateral view) dark brown hairs on distal half, with whorls of dark brown scales apically, tarsus with whorls of brown bristles at apex of first three segments. Abdomen with dorsal surface dark brown except first segment grey, with reddish blue metallic luster; ventral surface with basal half grey, distal half greyish white.

Male genitalia ( Fig. 5 ). Uncus elongate triangular, with sparse long hairs laterally, broad at base, gradually narrowed to apex, distal part short conical, reflexed. Gnathos triangular, gradually narrowed to apex, hooked distally. Tegumen trapezoidal. Valva slightly narrow basally, cuculus nearly ovate, with dense long hairs; costa concave medially, transtilla © Zoological Systematics, 40(1): 99–102 conical; sacculus with ventral margin concave near middle. Juxta small and round, weakly sclerotized. Vinculum narrowly banded; saccus U-shaped, about 1/2 length of uncus. Aedeagus broad basally, narrowed distally, with a clubbed apical protrudence; cornutus spine-like, placed at basal 1/4.

Female genitalia ( Fig. 6 ). Papilla analis with anterior half broad, parallel laterally, posterior half gradually narrowed to apex, with long spines; Eighth segment with long spines on posterior margin. Apophysis anteriores slightly longer than apophysis posteriores. Ostium bursae opening at seventh sternum. Antrum inverted trapezoidal, with several longitudinal wrinkles, length longer than width. Ductus bursae very short, not divided distinctly from corpus bursae. Ductus seminalis arising from junction between corpus bursae and ductus bursae, long and curved, expanded medially. Corpus bursae membranous, with some spicules at junction of corpus bursae and ductus bursae; signum one, nearly triangular, hunched centrally, forming a longitudinal ridge.

Distribution. China (Guizhou, Shaanxi), Russia (Far East).

Diagnosis. This species can be distinguished from T. luxuriosa by the dark brown forewing with purple metallic luster, bearing an obscure ivory olivary ventro-basal spot crossing 1/5 of the wing; in T. luxuriosa, the dark purple forewing has a pale metallic brassy-yellowish triangular ventro-basal spot crossing 2/3 of the wing (Meyrick, 1911).

Funding This study was supported by the National Natural Science Foundation of China (31372241, J1210005).

Figures

Figs 1−4. Thylacosceloides miniata Sinev, 1988. 1. Head, lateral view, showing frons slanting backward. 2. Head, dorsal view, showing a broad longitudinal central groove in male occiput. 3. Adult. 4. Venation, slide no. GW13021 ♂ W. Scale bars: 1=0.2mm, 2 =0.1mm, 3 =1mm, 4=0.5 mm.

Figs 5−6. Genitalia of Thylacosceloides miniata Sinev, 1988. 5. Male, slide, no. GW13021. 6. Female, slide, no. GW13020. a. aedeagus. Scale bars=0.1 mm.