Promalactis parvispinata Wang, 2024

Wang, Shuxia, Liu, Chen & David, Lees, 2024, Partial revision of Promalactis Meyrick (Lepidoptera: Oecophoridae), based on specimens deposited in the Natural History Museum, London, Zootaxa 5536 (1), pp. 1-58 : 17

Promalactis parvispinata Wang , sp. nov.

( Figs 16 , 49 )

Type material. Brunei: Holotype ♂, Disturbed Lowland Forest , Lamunin Sg Burong water tanks, 60 m, 15– 20.IV.1993, leg. G.S. Robinson, slide No. NHMUK010316942 .

Diagnosis. The new species is similar to P. meyi Lvovsky, 2000 . It can be distinguished by the shorter uncus and the gnathos, the costa of the valva smoothly arched medially, and the saccus 3/5 the length of the valva. In P. meyi , the uncus and the gnathos are relatively longer, the costa of the valva is distinctly convex medially, and the saccus is 1/4 the length of the valva.

Description. Adult ( Fig. 16 ). Forewing length 3.5 mm.

Head. Vertex snowy white, frons grey, occiput ochreous brown. Labial palpus with second segment orange yellow mixed with black scales on outer surface, pale yellow on inner surface; third segment black. Antennal scape snowy white dorsally, pale grey ventrally; flagellum black, dorsally annulated with white except basal several flagellomeres white.

Thorax. Mesonotum and tegula deep ochreous brown. Forewing ochreous yellow, dark ochreous brown from above fold to dorsum, orange yellow distally; basal fascia white edged with black scales, from near base of dorsum oblique inward to base of costal margin; antemedian fascia white edged with black scales, from distal 1/3 of dorsum to basal 1/4 of costal margin, wider anteriorly, parallel with basal fascia; costal spot white, edged with sparse black scales on inner and posterior margins, orange yellow on outer margin, extending from distal 1/4 to above posterior angle of cell; tornal spot grey, edged with scattered black scales, extending to below costal spot; apex with diffused greyish black scales; fringe orange yellow except greyish black along distal part of costal margin and around tornus basally. Hindwing and fringe grey. Foreleg black except femur dirty white, tibia with white spot at base and middle, with a tuft of white scales at apex, tarsus white at apex of basal tarsomere and on entire second and apical tarsomeres; midleg dirty white ventrally, black dorsally, tibia with a tuft of white scales apically, tarsus white at apex of basal tarsomere and on entire second and apical tarsomeres; hindleg dirty white ventrally, black dorsally, tarsus white except basal tarsomere black at base.

Male genitalia ( Fig. 49 ). Uncus triangular, wide at base, narrowed to apex, setose and sclerotized laterally. Gnathos slightly longer than uncus, triangular, wide at base, narrowed to pointed apex, weakly sclerotized. Tegumen furcate from posterior 1/3; lateral arm narrowed to pointed anterior end. Valva subparallel basally, slightly broadened at about distal 1/3, narrowed from distal 1/3 to rounded apex, densely setose, ventral margin with a small spine-shaped process beyond distal 1/4; costa narrow, slightly concave near base, smoothly arched medially; sacculus wide at base, narrowed to middle, then sub-elliptically broadened dorsad to before rounded apex, with dense setae, apex free from valva, reaching base of ventral spine of valva. Saccus clavate, rounded apically, 1/2 length of valva. Juxta being an irregular plate; basal lobe sub-digitate. Phallus tubular, 1.2 times length of valva, curved in an arc distally; cornutus spine shaped, about 2/7 length of phallus.

Female unknown.

Distribution. Brunei.

Etymology. The specific epithet is compounded from the Latin parvus and spinatus, referring to the small spine-shaped process beyond the distal 1/4 of the valva on the ventral margin.

Figures

FIGURES 9–16. Adults of Promalactis spp. 9. P. inaequilonga sp. nov.; 10. P. pallidistriata sp. nov.; 11. P. auriculata sp. nov.; 12. P. furciuncata sp. nov.; 13. P. gracilenta sp. nov.; 14. P. lativalva sp. nov.; 15. P. longiclavata sp. nov.; 16. P. parvispinata sp. nov. All males and holotypes. Scale bar = 1.0 mm.

FIGURES 46–51. Male genitalia of Promalactis spp. 46. P. gracilenta sp. nov.; 47. P. lativalva sp. nov.; 48. P. longiclavata sp. nov.; 49. P. parvispinata sp. nov.; 50. P. vulgaris sp. nov.; 51. P. apicibilobata sp. nov. All holotypes. Scale bar: 46–47 = 0.2 mm; 48–51 = 0.25 mm.