Promalactis unifurcata 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 : 595

Promalactis unifurcata Wang , sp. nov.

( Figs. 5 , 13 a–b, 17)

Type material. CHINA, Hainan Island: Holotype ♂, Wuzhishan Nature Reserves (18.907°N, 108.680°E), 710 m, 21.IV.2014, coll. Tengteng Liu, Wei Guan & Sha Hu , slide No. HS 15073. Paratypes: 4♂, 1♀, Shuiman County (18.53°N, 109.40°E), 766 m, Mt. Wuzhi , 6–7.VII.2015, coll. Qingyun Wang, Suran Li & Mengting Chen, slide Nos. HS 15189 ♂, HS15191 ♀ ; 1♂, Jianfengling Nature Reserves (18.74°N, 108.87°E), 770 m, 17.VII.2014, coll. Peixin Cong, Linjie Liu & Sha Hu, slide No. HS 14153 ♂ .

Diagnosis. This species is much similar to P. apicifurcata sp. nov. and P. apicispinifera Wang, Kendric & Sterling, 2009 in appearance and in the male genitalia. The differences between them are stated under P. apicifurcata sp. nov.

Description. Adult ( Fig. 5 ) wingspan 8.0 mm. Head with vertex and forns yellow, occiput grayish brown. Labial palpus with second segment blackish brown on basal 2/3, yellow on distal 1/3, blackish brown at apex; third segment black, yellow at base and apex. Antenna with scape yellow except black apically; flagellum black ringed with yellow. Thorax dark ochreous brown, yellow posteriorly; tegula yellow, ochreous brown at base. Forewing pale ochreous brown; costal margin with three black spots: basal spot sub-rectangular, smallest, just reaching subcostal vein ventrally; median spot broad quadrangular, oblique outward, its inner margin extending to middle of wing, outer margin extending obliquely to lower angle of cell and edged with a distinct white streak; distal spot extending triangularly to apex of wing; oblique white streak running from outer margin of basal costal spot to lower angle of cell, almost meeting white streak from outer margin of median costal spot; cell with a large blackish brown spot at base; dorsum with a sub-ovate black spot at base, with a square black spot at basal 2/5 edged on lateral margins with white streaks that extend respectively upward and joined with above-mentioned oblique white streak; tornus with an elliptic black spot extending to lower angle of cell, beyond it placed a white dot; apex with an elliptic white spot; cilia black along distal part of costal margin, remaining cilia yellow and with black-tipped scales basally. Hindwing and cilia gray. Foreleg blackish brown, tibia with yellow tuft of scales at middle and apex; midleg with femur yellow, tibia blackish brown, with yellow dot at base on dorsal surface, with yellow tuft of scales at middle and apex, tarsi of fore- and midlegs blackish brown except yellow at base and at apex of first tarsomere and on distal half of second and fifth tarsomeres; hindleg with femur and tibia grayish yellow on ventral surface, gray on dorsal surface, tarsus grayish yellow on ventral surface, blackish brown on dorsal surface except yellow at base and at apex of first tarsomere and on distal half of second and fifth tarsomeres.

Male genitalia ( Fig. 13 ). Uncus bell-like, setose, parallel laterally in basal 1/3, narrowed from 1/3 to middle, digitate in distal half, rounded at apex. Gnathos tongue-shaped, granulate on distal 1/3, rounded apically, approximately same length as uncus. Valva broad basally, separated into costal and saccular parts distally: costal part broad at base, narrowed to rounded apex, sparsely setose, costa narrow, sclerotized, convex at about 2/3, with a triangular apical process folding ventrad; saccular part sub-rectangular, slightly wider basally, produced to a strong thorn-like dorsoapical process that is slightly longer than uncus and sharp at apex, sacculus narrowly banded, sclerotized, angled ventroapically. Saccus approximately same length as uncus, rounded apically. Juxta with lateral lobes heavily sclerotized, asymmetrical: left lobe furcate distally, its outer branch produced to a long spine, inner branch weakly sclerotized distally, with two to three large denticles along inner margin; right lobe longer than left lobe, straight, narrowed distally, pointed at apex, exceeding base of uncus; basal lobe reaching anterior 1/3 of saccus. Aedeagus slightly longer than sacculus; cornutus spiniform, longer than 1/5 length of aedeagus, slightly curved.

Female genitalia ( Fig. 17 ). Apophyses anteriores about 4/7 length of apophyses posteriores. Lamella postvaginalis cordiform, deeply concave triangularly at middle on posterior margin. Antrum funneled, heavily sclerotized. Ductus bursae very long, membranous, basal 1/3 slender, distal 2/3 inflated, medial 1/3 weakly sclerotized and bearing several short spines. Corpus bursae elliptic; signum absent.

Distribution. China (Hainan).

Etymology. The specific epithet is derived from the Latin uni - and furcatus, referring to the left lobe furcate in 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 13 – 15. Male genitalia of Promalactis spp. 13 a – b, P. unifurcata sp. nov., slide Nos.: a, holotype, HS 15073, b, paratype, HS 15189; 14 a – b, P. apicifurcata sp. nov., slide Nos.: a, paratype, HS 15201, b, paratype, HS 15077; 15, P. longimaculata sp. nov., paratype, slide No. HS 15078. Scale bars: 0.2 mm.

FIGURES 16 – 19. Female genitalia of Promalactis spp. 16, P. anterodilata sp. nov., paratype, slide No. HS 15209; 17, P. unifurcata sp. nov., paratype, slide No. HS 15191; 18, P. longimaculata sp. nov., paratype, slide No. HS 152; 19, P. serrata, Du, Li & Wang, slide No. HS 14114. Scale bars: 0.2 mm.