Cedestis leucopterostigmatis Sohn and Wu, 2010

Sohn, Jae-Cheon, Wu, Chun-Sheng & Han, Hui-Lin, 2010, Three new species of Yponomeutinae (Lepidoptera: Yponomeutidae) from China with faunistic supplements and an updated list of the Chinese species of the subfamily, Journal of Natural History 44 (45 - 46), pp. 2803-2816 : 2804-2806

Cedestis leucopterostigmatis Sohn and Wu , n. sp.

( Figures 1, 3 )

Type. HOLOTYPE: 1♀, alt. 1100m, Mt. Lushan , Jiangxi Prov., China, 10 VII 1975 (YQ Liu), genitalia slide no. IOZ-09035.

Holotype is deposited in the Institute of Zoology , Chinese Academy of Sciences, Beijing, China.

Diagnosis. This new species is closely related to Cedestis exiguata Moriuti, 1977 ( Figure 2 ) which occurs in Japan and Korea ( Sohn 2009). Both species are superficially very similar but differ from each other by the broader white marking around the forewing pterostigma in C. leucopterostigmatis . The former is also distinguished from the latter by the female genitalia: ductus bursae 1.5 times longer and signum placed closer to junction with ductus bursae ( Figures 3 and 4 ).

Description. Head. Vertex rough with long, white piliform scales, tipped with grayish brown near frontoclypeus; frons dark brown. Antenna filiform, half as long as forewing; scape with scales dark brown on distal two-thirds, white on basal third, pectens dark brown, tipped with white; each of basal eight flagellomeres with two whorls of dark brown scales white basally, remainder of segments with a white basal and a dark brown distal whorl of scales on each flagellomere. Labial palpus nearly straight, two times longer than eye diameter, white dorsally, dark brown ventrally; third segment as long as second, with slightly dense scale tufts distally.

Thorax and abdomen. Patagium orange-white; tegula and mesonotum purplish brown. Fore- and midleg with coxa to tibia white, intermixed with dark brown; tarsi white, with a dark brown ring on the distal end of each segment. Hindleg with coxa to tibia dark grayish brown dorsally, white ventrally; tarsomeres white dorsally and basally, dark brown ventrally on distal two-thirds. Forewing length 6.3 mm (n = 1), costa broadly curved, subtriangular terminally, lustrous purplish brown, intermixed with white broadly spread from discal cell to apex; fringes white before apex, grayish brown after apex. Hindwing dark brown, tinged with gray on anal areas; fringes yellow-brownish gray. Abdomen dark gray dorsally, pale gray ventrally.

Female genitalia ( Figure 3 ). Papilla analis subtriangular, setose, as long as eighth abdominal segment; inter-segmental membrane after eighth segment short; a pair of small setose humps on eighth sternite; apophysis anterioris as long as apophysis posterioris plus Y branches. Ostium bursae small; antrum incompletely surrounding base of ostium. Ductus bursae narrow, tubular, with granules except at entrance, denser near corpus, nine times longer than corpus bursae, sinuate. Corpus bursae oval; signum near to cervix, elongate rhomboid, scobinate.

Distribution. China (southeast).

Etymology. The species epithet, leucopterostigmatis, is derived from the genitive of a Greek noun, pterostigma, combined with the Greek root, leuco, meaning “white”, and refers to a white pterostigma on forewings of the new species.

Figures

Figures 1–4. (1) Adult of Cedestis leucopterostigmatis Sohn and Wu, n. sp. Note: Scale bar = 3 mm, (2) Adult of Cedestis exiguata. Note: Scale bar = 3 mm, (3) Female genitalia of Cedestis leucopterostigmatis Sohn and Wu, n. sp. Note: Scale bar = 1 mm, (4) Female genitalia of Cedestis exiguata Note: Scale bar = 1 mm.