Promalactis bilobulata Wang

Hu, Sha & Wang, Shuxia, 2016, Taxonomic study of the genus Promalactis Meyrick (Lepidoptera, Oecophoridae) from Hainan Island, China (II), Zootaxa 4136 (3), pp. 35-48 : 36-41

Promalactis bilobulata Wang , sp. nov.

( Figs. 2 , 12 )

Type material. CHINA, Hainan Island: Holotype Ƌ. Mt. Diaoluo, 250 m, 22.IV.2008, coll. Bingbing Hu and Haiyan Bai, genitalia slide No. YGX08065. Paratype: 1Ƌ, Mt. Jinfu (29°06′N, 107°10′E), Chongqing, 1100 m, 5.VIII.2012, coll. Xiaofei Yang and Tengteng Liu, genitalia slide No. DZH12316.

Diagnosis. This species superficially looks most like P. fascispinata Du, Li et Wang, 2011 by having the same forewing pattern. Promalactis bilobatulata can be separated by the male genitalia. In P. bilobulata , the juxta bears a long curved cluster of dense setae and thin spines, the sacculus is approximately two times the length of the costa and the short and broad saccus is slightly narrowed to rounded apex. In P. fascispinata , the juxta bears an elliptic cluster of dense thin spines, the sacculus is less than 1.5 times length of the costa, and the narrow elongate saccus is almost uniform except slightly narrowed apically.

Description. Adult ( Fig. 2 ) with forewing expanse 9.0−10.0 mm. Head with frons lead gray, vertex shining white, occiput dark ochreous brown. Labial palpus with first and second palpomeres pale yellow on inner surface, ochreous brown on outer surface; third palpomere black, approximately same length as second palpomere. Antenna with scape white; flagellum with ventral surface dark brown, dorsal surface white in basal half and black ringed with white in distal half. Thorax and tegula dark ochreous brown. Forewing dark ochreous brown, black at apex; costa with a white semicircular spot at 3/4, extending to above lower corner of cell, bordered by black scales except along costa; dorsum with two white streaks edged with black scales: basal streak slender, reaching base of fold, second streak from dorsal 3/5 extending obliquely inward to 1/3 length of upper margin of cell, slightly arched outward; area between two streaks dark ochreous brown; ill-defined black dot at end of fold; cilia grayish yellow in basal 2/3, yellow in distal 1/3. Hindwing and cilia brown. Fore leg black, tarsi marked with white dorsally; mid leg yellow on ventral surface, black on dorsal surface, tibia with a cluster of long white scales, tarsi dorsally marked with white; hind leg with femur yellow, ventral surface of tibia and tarsi yellow, tibia gray on dorsal surface, tarsi black with white markings on dorsal surface.

Male genitalia ( Fig. 12 ). Uncus broad at base, narrowed to rounded apex. Gnathos broad lingulate, blunt at apex, granular in distal half, slightly longer than uncus; lateral arms short. Tegumen branched from about middle, rounded apically. Valva broad and parallel basally, asymmetrical: costa short, produced to a long free distal process: left costal process more than twice length of costa itself, uniformly slender, straight in basal 3/5, curved in distal 2/5, pointed at apex; right costal process slightly longer than costa itself, wide at base, narrowed to pointed apex, straight in basal 2/3, curved at distal 1/3; sacculus about twice length of costa, produced to a free distally process: left saccular process slender in basal 2/3, furcate at distal 1/3, forming two setose lobes: dorsal lobe wider and shorter than ventral lobe, inflated before apex, ventral lobe uniformly slender; right saccular process shorter than left saccular process, slender in basal half, furcate at middle, forming two setose lobes: dorsal lobe slightly widened before apex, ventral lobe clubbed, slightly longer. Saccus short and broad, slightly narrowed to rounded apex, about half length of uncus. Juxta sclerotized, curved distally, reaching base of uncus, aequilate in basal 1/3, widened at distal 1/4, distal 1/4 with a long curved cluster of dense setae and thin spines; basal lobe slender, reaching middle of saccus. Phallus slightly curved, slightly longer than valva, apically narrowed, triangular, heavily sclerotized laterally; cornutus absent.

Female unknown.

Distribution. China (Chongqing, Hainan).

Etymology. The specific epithet is derived from the Latin bi - (dual) and lobulatus (with a small lobe), referring to the distally bifurcate saccular lobes.

Figures

FIGURES 1 – 10. Adults of Promalactis spp. 1, P. falciprocessa sp. nov., paratype, female; 2, P. bilobulata sp. nov., paratype, male; 3, P. longivalvaris sp. nov., paratype, male; 4, P. pugnivalvata sp. nov., paratype, male; 5, P. clavata Du, Li et Wang, male; 6, P. caperatiella Kim et Park, male; 7, P. termelliptica sp. nov., paratype, male; 8, P. gladiata sp. nov., paratype, male; 9, P. lucida sp. nov., paratype, male; 10, P. latitaeniata sp. nov., paratype, female. Scales = 1 mm.

FIGURES 11 – 15. Male genitalia of Promalactis spp. 11, P. falciprocessa sp. nov., paratype, slide No. HS 14113; 12, P. bilobulata sp. nov., paratype, slide No. DZH 12316; 13, P. longivalvaris sp. nov., holotype, slide No. HS 14025, a, enlarged apex of phallus; 14, P. pugnivalvata sp. nov., paratype, slide No. HS 15181, a, enlarged apex of phallus; 15, P. caperatiella Kim et Park, slide No. HS 16012, a-b, enlarged apex of phallus. Scales = 0.2 mm.