Promalactis albipectinalis Wang, 2020

Wang, Shuxia & Liu, Chen, 2020, Taxonomic study of the genus Promalactis Meyrick, 1908 (Lepidoptera Oecophoridae). VII. The cornigera species group, with descriptions of six new species, Zootaxa 4718 (1), pp. 77-86 : 78-79

Promalactis albipectinalis Wang , sp. nov.

( Figs 1 , 7 , 13 )

Type material. CHINA, Yunnan: Holotype ♂, Nankang (24.85°N, 98.85°E), Baoshan County, 2009 m, 18.VII.2015, coll. Kaijian Teng and Xia Bai, slide No. JYY17535 . Paratypes (4♂, 2♀): 2♀, 18‒20.VII.2015, other same data as holotype, slide Nos. LC19100, JYY17429 ; 2♂, Wenquan, Kunming , 1900 m, 30.VIII.2005, coll. Yingdang Ren, slide Nos. W05048, DZH12259 ; 1♂, Mt. Weibao , Weishan County, 2244 m, 24.VII.2013, coll. Shurong Liu, Yuqi Wang and Kaijian Teng, slide No. JYY17431 ; 1♂, Mt. Jizu, Dali , 2228 m, 27.VII.2014, coll. Kaijian Teng et al, slide No. JYY17518 .

Diagnosis. Promalactis albipectinalis is characterized by the antennae with a white pecten. It shares with P. cornigera Meyrick, 1918 , P. flavidilineata sp. nov. and P. grandaedeaga sp. nov. an extremely elongate saccus and a very long aedeagus that is more than twice the length of the valva in the male genitalia. The new species can be distinguished from P. cornigera by having one cornutus in the vesica as compared to two in the latter species; and from P. flavidilineata sp. nov. and P. grandaedeaga sp. nov. by the costa of the valva not convex medially, and the juxta with slender lateral arms produced to acute apices reaching the posterior 2/5 of the tegumen apically. In P. flavidilineata and P. grandaedeaga , the costa of the valva is convex medially, and the triangular lateral arms of the juxta reach the posterior 2/3 of the tegumen apically.

Description. Adult ( Fig. 1 ). Wingspan 11.0‒13.0 mm. Head pale yellow, occiput dark yellow laterally. Labial palpus with basal segment pale yellow on inner surface, dark brown on outer surface; second segment pale yellow on inner surface, ochreous yellow on outer surface; third segment with basal 3/5 yellow, intermixed with black scales on inner surface, distal 2/5 black except whitish yellow apically. Antenna with scape black dorsally, white ventrally; pecten white; flagellum black annulated with white dorsally, dark brown ventrally. Thorax yellow; tegula dark ochreous yellow. Forewing pale ochreous yellow, with dense ochreous-brown and greyish-brown scales on basal 3/4 along anterior 1/3 and posterior 1/3, respectively; costal margin greyish black along basal 3/5, with a triangular greyish-black patch at basal 3/5 extending to middle of outer margin of cell; dorsum with two short white streaks: first streak from about middle slightly oblique outward to basal 1/3 of lower margin of cell, then curved inward by a right angle to basal 1/4 of cell, outer margin with dense black scales posteriorly; second streak from distal 1/4 oblique outward to basal 2/3 of lower margin of cell, magined with black scales, denser posteriorly; fold with a few black and pale yellow scales distally; tornal spot black, diffused; apex with a few black and pale yellow scales; cilia ochreous yellow. Hindwing and cilia grey.

Male genitalia ( Fig. 7 ). Uncus wide at base, narrowed to basal 3/5, thereafter much slenderer to acute apex. Gnathos about 3/4 length of uncus, broad lingulate, slightly broadened and rounded apically, with scale-like protuberances on distal 1/4. Tegumen divided from posterior 2/5, narrowed anteriorly. Valva with basal half almost parallel, distal half narrowed to rounded apex; costa almost flat medially, with a densely setose, overlapped half round area on distal half extending to about midwidth of valva anteriorly. Sacculus broad basally, narrowed distally, slightly concave medially on dorsal margin, densely setose on distal 3/5, produced to an apical spine directing upward. Sac- cus about 3.5 times length of uncus, wide at base, gradually narrowed to pointed apex, produced semi-elliptically at middle on posterior margin. Juxta quadrate basally; lateral arm slender, narrowed to sharp apex, reaching posterior 2/5 of tegumen apically. Aedeagus slender, about 2.2 times length of valva; with a large, curved cornutus in vesica, about 1/6 length of aedeagus.

Female genitalia ( Fig. 13 ). Apophyses anteriores about half length of apophyses posteriores. Lamella postvaginalis sub-rectangular, rounded on posterior margin. Antrum wide and short, funnel-shaped. Ductus bursae with basal 1/3 sclerotized, heavily sclerotized along lateral edge; distal 2/3 wider, membranous. Corpus bursae round; signa paired, rectangular, with several small denticles, edged with six large teeth.

Distribution. China (Yunnan).

Etymology. The specific epithet of this new species is derived from the Latin albus and pectinalis, referring to the white pecten of the antennae.

Figures

FIGURES 1‒6. Adults of Promalactis spp. 1, P. albipectinalis, holotype, ♂; 2, P. flavidilineata, holotype, ♂; 3, P. grandaedeaga, holotype, ♂; 4, P. latignatha, holotype, ♂; 5, P. malipoensis, holotype, ♂; 6, P. voluta, holotype, ♂. Scales = 2 mm.

FIGURES 7‒12. Male genitalia of Promalactis spp. 7, P. albipectinalis, holotype, slide No. JYY17535; 8, P. flavidilineata, holotype, slide No. DZH12266; 9, P. grandaedeaga, holotype, slide No. JYY17501; 10, P. latignatha, holotype, slide No. ZMUC- NK010; 11, P. malipoensis, holotype, slide No. JYY17448; 12, P. voluta, holotype, slide No. JYY17515. Scales = 0.2 mm.

FIGURES 13‒15. Female genitalia of Promalactis spp. 13, P. albipectinalis, paratype, slide No. LC19100; 14, P. malipoensis, paratype, slide No. JYY17454; 15, P. voluta, paratype, slide No. JYY17514. Scales = 0.2 mm.