Promalactis tenuivalvata Wang, 2017

Hu, Sha & Wang, Shuxia, 2017, Taxonomic study of the genus Promalactis Meyrick (Lepidoptera, Oecophoridae) from Hainan Island, China (III), Zootaxa 4303 (4), pp. 590-600 : 594

Promalactis tenuivalvata Wang , sp. nov.

( Figs. 4 , 12 )

Type material. CHINA, Hainan Island: Holotype ♂, Jianfengling Nature Reserves (18.44°N, 108.52°E), 770 m, 29.V.2015 , coll. Peixin Cong, Wei Guan & Sha Hu, slide No. HS15192. Paratype: 1♂, Jianfengling Nature Reserves , 770 m, 17.VII.2014 , coll. Peixin Cong, Linjie Liu & Sha Hu, slide No. HS14145♂; 4♂, Tianchi , 787 m, 11–16.VII.2015, Qingyun Wang, Suran Li & Mengting Chen, slide No. HS 14188 ♂ ; 1♂, Limushan Nature Reserves , 607 m? 23.VII.2014 , coll. Peixin Cong, Linjie Liu & Sha Hu, slide No. HS15091♂; 1♂, Wuzhishan Nature Reserves , 742 m, 4.VII.2014 , coll. Peixin Cong, Linjie Liu & Sha Hu, slide No. HS14103♂.

Diagnosis. Promalactis tenuivalvata sp. nov. shares a similar forewing pattern with P. apicispinifera Wang, Kendric & Sterling, 2009 , P. apicifurcata sp. nov. and P. furcata sp. nov. Promalactis tenuivalvata sp. nov. has an inverted campaniform uncus, an elongated valva with a dorsoapical spine and a large saccus about 2.5 times the length of the uncus, which make it distinguishable from the above three species.

Description. Adult ( Fig. 4 ) wingspan 7.0–8.0 mm. Head with vertex and frons pale ochreous yellow, occiput ochreous yellow mottled black scales. Labial palpus with second segment pale yellow except brown on outer surface and blackish brown on inner surface at apex; third segment brown except pale yellow basally and apically, same length as second segment. Antenna with scape yellow except blackish brown apically; flagellum black ringed with yellow. Thorax and tegula blackish brown. Forewing pale ochreous yellow; costal margin with three large black spots: basal spot quadrangular, largest, interrupted transversely at anterior 1/3, across fold ventrally, with two white dots at its base, outer margin oblique outward to basal 2/5 of cell at middle, bordered by a white streak sometimes diffused to before lower angle of cell; median spot quadrangular, across upper margin of cell, sparsely diffused to ill-defined black tornal spot, its outer margin bordered by a white streak reaching lower corner of cell; distal spot extending triangularly to apex; dorsum with a large black quadrate spot mottled ochreous brown oblique outward, both inner and outer margins bordered by white streak extending to white streak running from outer margin of basal spot; cilia black along distal part of costal margin, remaining cilia yellow tinged with black-tipped scales along dorsum. Hindwing and cilia brown. Fore- and midlegs black, tibiae with yellow spot at base and middle as well as at apex on dorsal surface, tarsi yellow at apex of each tarsomere; hindleg grayish yellow on inner surface except third and fourth tarsomeres blackish brown, dorsal surface with femur and tibia grayish brown, tarsus blackish brown except yellowish white at apex of each tarsomere.

Male genitalia ( Fig. 12 ). Uncus large, inverted campaniform, basal 2/5 uniformly broad, slightly narrowed from beyond 2/5 to 3/5, sharply narrowed and uniform from 3/5 to 4/5, then widened to apex, shallowly concave at middle of apex. Gnathos approximately as long as uncus, elongate narrow, slightly widened before rounded apex, spatulate distally. Tegumen branched from anterior 1/3, narrowed anteriorly. Valva elongate narrow, length 6 times maximum width; costa obviously concave basally, bearing a strong spiniform apical process; sacculus broad basally, slightly narrowed distally, setose on distal 2/5, roundly protruded at apex. Saccus large, uniform, rounded at apex, its length 6.5 times its width and approximately 2 times length of uncus. Juxta with lobes slender, reaching middle of tegumen; basal lobe slender and long, same length as lateral lobe. Aedeagus slender, approximately 2.5 times length of valva, with large apical spine; cornutus spiniform, slightly broad basally, acute apically, 1/4 length of aedeagus.

Female unknown.

Distribution. China (Hainan).

Etymology. The specific epithet is derived from the Latin tenu- and valvatus, referring to the relatively narrow valva of the male genitalia.

Figures

FIGURES 1 – 8. Adults of Promalactis spp. 1, P. anterodilata sp. nov., paratype, male; 2, P. bitriangula sp. nov., holotype, male; 3, P. longiprocessa sp. nov., holotype, male; 4, P. tenuivalvata sp. nov., holotype, male; 5, P. unifurcata sp. nov., holotype, male; 6, P. apicifurcata sp. nov., holotype, male; 7, P. longimaculata sp. nov., holotype, male; 8, P. serrata, Du, Li & Wang, male. Scale bars: 1.0 mm.

FIGURES 9 – 12. Male genitalia of Promalactis spp. 9, P. anterodilata sp. nov., paratype, slide No. HS 16019; 10, P. bitriangula sp. nov., paratype, slide No. HS 15067; 11, P. longiprocessa sp. nov., paratype, slide No. HS 14160; 12, P. tenuivalvata sp. nov., holotype, slide No. HS 15192. Scale bars: 0.2 mm.