Promalactis stenitubilaris

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: 155

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Promalactis stenitubilaris

sp. nov.

Promalactis stenitubilaris  sp. nov.

( Figs 3 View Figure , 8 View Figure )

Type material. CHINA: Holotype ♀, Caoping Village (30.94°N, 103.32°E), Sanjiang Town , Wenchuan County, Sichuan Province, 1557m, 11.V.2014, coll. Kaijian Teng, Wei Guan, Xiuchun Wang and Shurong Liu, slide No. JYY17343GoogleMaps  . Paratypes: 6♀, 9, 11.V.2014, slide Nos. JYY17341, JYY17342, other same data as for holotypeGoogleMaps  ; 2♀, Wanniansi, Mt. Emei , 830m, 13.VII.2014, slide No. JYY17246, same collectors as for holotype. 

Diagnosis. This new species is characterized by having an extremely elongate lamella postvaginalis and a torch-like lamella antevaginalis. It is similar to P. apicifurcellata  sp. nov., but can be distinguished by the lamella postvaginalis rounded apically and the torch-like lamella antevaginalis. In P. apicifurcellata  sp. nov., the lamella postvaginalis is slightly bifurcate at apex and the lamella antevaginalis is trapezoidal.

Description. Adult ( Fig. 3 View Figure ) wingspan 11.5‒12.5 mm. Head with vertex shining white, frons whitish silvery, occiput reddish ocherous. Labial palpus with first and second segments yellow on inner surface, reddish ocherous to ocherous brown on outer surface; third segment dark ocherous brown except white dorsodistally. Antenna blackish brown, scape white and flagellum annulated with white on dorsal surface. Thorax and tegula pale ocherous yellow. Forewing ocherous yellow, mixed with greyish-brown scales; with three white lines laterally edged with blackish-brown scales: basal line thinner, from above base of fold straightly oblique outward to dorsum; antemedian line wider, from about basal 1/3 of upper margin of cell slightly oblique outward to middle of dorsum, parallel with basal line; postmedian line from before distal 1/3 of costal margin oblique inward to above lower angle of cell, then straightly oblique inward to dorsum at end of fold, slightly widened anteriorly; cilia orange yellow except grey along distal part of dorsum. Hindwing and cilia greyish brown. 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.

Female genitalia ( Fig. 8 View Figure ): Apophyses posteriores about twice length of apophyses anteriores. Ostium bursae large and round. Lamella postvaginalis extended to narrow and extremely elongate, distally setose, tubular process which is uniformly narrow except slightly widened at base. Lamella antevaginalis short and wide, torch-like, arched and narrowed posteromedially, produced to large triangular process posterolaterally, with smaller triangular process at each side near lateral process. Antrum funnel shaped, elongate. Ductus bursae longer than corpus bursae, coiled and heavily sclerotized medially, usually with four large spines and some nail-like short spines grouped at beginning of sclerotization. Corpus bursae elliptical, with dense granules; signum absent.

Male unknown.

Distribution. China (Sichuan).

Etymology. The specific epithet is derived from the Latin sten- and tubilaris, referring to the narrowly elongate tubular postvaginalis.

Remarks. Of all the known species of the trilineata  subgroup, eight species are known from males only. Promalactis stenitubilaris  sp. nov. and P. apicifurcellata  sp. nov. can be distinguished from P. bifurciprocessa  , P. convexa  , P. quadratitabularis  and P. similiconvexa  by lacking a dark preapical costal spot; from P. brevivalvaris  by the curved postmedian line; and from P. splendidella  , P. varilineata  and P. aggregata  sp. nov. by the conspicously parallel basal and antemedian lines.