Promalactis aggregata

Wang, Shuxia & Jia, Yanyan, 2018, Review of the genus Promalactis Meyrick, 1908 (Lepidoptera: Oecophoridae) III. The trilineata species group, with descriptions of four new species, Zootaxa 4433 (1), pp. 151-160: 152-154

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Promalactis aggregata

sp. nov.

Promalactis aggregata  sp. nov.

( Figs 1 View Figure , 5 View Figure )

Type material. CHINA: Holotype ♂, Xiasi Village (28.20°N, 107.25°E), Kuankuoshui Nature Reserves , Suiyang County, Guizhou Province, 840 m, 9.VI.2010, coll. Linlin Yang, slide No. DZH12157.GoogleMaps 

Diagnosis. This species is similar to P. similiconvexa Du et Wang, 2013  . It can be distinguished by the right valva produced to a large ventroapical spine curving dorsad by 90°, the right sacculus dentate along distal 1/3 of the dorsal margin, and the cornutus approximately 1/4 the length of the aedeagus. In P. similiconvexa  , the right valva is produced to a triangular, straight outward process, the sacculus of the right valva is not dentate but has a triangular dorsal process at distal 1/6, and the cornutus is less than 1/5 the length of the aedeagus.

Description. Adult ( Fig. 1 View Figure ) wingspan 14.5 mm. Head with vertex and frons shining ivory, occiput brown. Labial palpus with first and second segments yellow on inner surface, ocherous brown on outer surface; third segment dark ocherous brown. Antenna with scape white; flagellum white and dark brown on basal half of dorsal surface, remaining flagellum dark brown. Thorax and tegula ocherous brown. Forewing ocherous brown, with three white lines laterally edged with blackish-brown scales: basal line from above base of fold straightly oblique outward to basal 1/4 of dorsum; antemedian line from before middle of dorsum oblique inward to basal 2/5 of upper margin of cell; postmedian line from distal 1/3 of costal margin oblique inward to lower angle of cell, then oblique inward to basal 2/3 of dorsum, enlarged and ill-defined anteriorly; cilia orange yellow except grey along distal part of dorsum. Hindwing and cilia grey. Foreleg black, tibia with white spot at base and middle on dorsal side, with a white tuft at apex; midleg black on dorsal side, yellow on ventral side; hindleg yellow; all tarsi white at apex of each tarsomere on dorsal side.

Male genitalia ( Fig. 5 View Figure ): Uncus narrowed at base, widened to shallowly concave apex. Gnathos slightly shorter than uncus; ventral plate sub-quadrate, straight apically; lateral arm widened from base, slightly shorter than ventral plate. Tegumen separated from posterior 1/3, narrowed anteriorly. Valva asymmetrical: left valva with basal half parallel, distal half narrowed toward apex, produced to a large thorn curving dorsad; costa with basal half narrow, distal half widened and folded, edged with denticles; sacculus with basal 1/4 uniformly wide, narrowed to basal 3/5, free from basal 3/5, extremely narrowed from 3/5 to 3/4, distal 1/4 slightly widened elliptically, dentate along dorsal margin, apically not reaching apex of valva. Right valva with basal 4/5 sub-parallel, distal 1/5 narrowed and produced to a large spine curving dorsad, dentate dorsally; costa narrow, sinuate; sacculus with basal half uniformly wide, almost reaching costa dorsally, extremely narrowed from 1/2 to basal 2/3, free from 1/2, distinctly widened from distal 1/3 and narrowed from before apex, dentate along dorsal margin, not reaching apex of valva apically. Saccus wide at base, narrowed to basal 1/3; distal 2/3 stout thumb-like, rounded apically. Juxta sub-elliptical, weakly sclerotized. Aedeagus approximately 1.4 times length of valva, with an irregular apical sclerite; cornutus spine-like, 1/4 length of aedeagus, basal half composed of many short spines ( Fig. 5a View Figure ).

Female unknown.

Distribution. China (Guizhou).

Etymology. The specific epithet is derived from the Latin aggregatus, referring to the basal half of the cornutus consisting of many spines.