Promalactis pectinacea Wang, 2019

Wang, Shuxia & Liu, Chen, 2019, Taxonomic study of the genus Promalactis Meyrick, 1908 (Lepidoptera: Oecophoridae) VI. The bigeminata species group, with descriptions of seven new species, Zootaxa 4679 (2), pp. 286-296 : 288-289

Promalactis pectinacea Wang , sp. nov.

( Figs 3 , 10 )

Type material. THAILAND, Chiang Mai Province: Holotype ♂, summit, Doi Suthep, 1600 m, 30.IX.1981, coll. Zool. Museum Copenhagen, slide No. ZMUC-NK019 ( ZMUC) . Paratype: 1♂, same data as holotype, slide No. ZMUC-NK020 ( ZMUC) .

Diagnosis. This species can be distinguished from other members of the bigeminata group by the trilobed uncus, the right valva produced medioapically to a slender clavate process that bears a slender, densely setose process at its basal 2/5, and the sacculus with a free distal process that is pectinate dorsoapically in the male genitalia.

Description. Adult ( Fig. 3 ). Wingspan 8.5‒10.0 mm. Head with vertex shining yellowish white, frons pale yellow, occiput yellow. Labial palpus with second segment pale yellow, with white scales apically; third segment yellow, with black scales distally, slender, approximately as long as second segment, pointed at apex. Antenna with scape yellow; flagellum white alternated with black on dorsal surface, dark brown on ventral surface. Thorax and tegula pale brownish yellow. Forewing ochreous yellow, yellow between fold and dorsum; with three white fasciae: basal fascia extending from base of costal margin to base of dorsum, oblique outward; antemedian fascia from basal 1/4 of costal margin to middle of dorsum, oblique outward, parallel with basal fascia, anterior 1/3 broadened; postmedian fascia from beyond middle of costal margin to dorsum before tornus, arched outward; costal spot beyond postmedian fascia, yellow, sub-triangular; black stripe from outer margin of postmedian fascia along lower margin to lower corner of cell; black scales scattered from outer margin of postmedian fascia and along posterior half of termen; large diffused irregular black spot situated before apex; apex with a few white scales; cilia yellow, with a few black-tipped scales along termen. Hindwing and cilia grey.

Male genitalia ( Fig. 10 ). Uncus heavily sclerotized, slender, trilobed: left lobe largest, narrow basally and distally, broadened medially, longitudinally with a cluster of spines dorsally; right lobe about 3/4 length of left lobe, sinuate, produced to a spine distally; median lobe clavate, sinuate, as long as right lobe, densely setose. Tegumen band-like anteriorly. Valva sub-rectangular, asymmetrical: left valva obtuse at apex, produced medioapically to a slender clavate process, which is curved at base, bears a slender, densely setose process at basal 2/5 and a fine spine at apex; right valva longer than left valva, with two sparsely setose apical processes: dorsoapical process clavate, curved ventrad distally, with a short slender process at basal 1/3 and an apical spine; ventroapical process digitate, short, less than 1/4 length of dorsoapical process. Sacculus almost uniform from base to basal 3/5, thereafter slightly narrowed and densely setose; distal 1/3 free, curved toward costa, narrowly rounded apically, with a row of dense pectination dorsoapically. Saccus short, almost parallel laterally, narrowly rounded at apex, about 1/4 as long as uncus. Juxta broad, sclerotized, sub-ovate, posteriorly produced to a short finger-like process reaching middle of uncus; anterior lobe slender. Aedeagus slightly arched medially, almost as long as valva, rounded at apex, with a spine-like preapical process; cornutus absent.

Female unknown.

Distribution. Thailand.

Etymology. The specific name is derived from the Latin pectinaceus, referring to the dorsoapical pectination of the distal process of the sacculus.

Figures

FIGURES 1‒7. Adults of Promalactis spp. 1, P. bigeminata sp. nov., holotype, ♂; 2, P. derecta sp. nov., holotype, ♂; 3, P. pectinacea sp. nov., holotype, ♂; 4, P. pileata sp. nov., holotype, ♂; 5, P. scalpelliformis sp. nov., holotype, ♂; 6, P. ventericoncava sp. nov., holotype, ♂; 7, P. venteriprocessa sp. nov., paratype, ♀; 7b, head. Scales = 2 mm except 7b = 0.2.

FIGURES 8‒11. Male genitalia of Promalactis spp. 8, P. bigeminata sp. nov., paratype, slide No. DZH10321; 9, P. derecta sp. nov., holotype, slide No. DZH09023; 10, P. pectinacea sp. nov., holotype, slide No. ZMUC-NK019; 11, P. pileata sp. nov., holotype, slide No. DZH09007. Scales = 0.2 mm.