Promalactis tibetica Wang, 2019

Wang, Shuxia & Jia, Yanyan, 2019, Taxonomic study of the genus Promalactis Meyrick, 1908 (Lepidoptera: Oecophoridae) IV. The sakaiella species group, with descriptions of fifteen new species, Zootaxa 4563 (3), pp. 491-515 : 495-496

Promalactis tibetica Wang , sp. nov.

( Figs 6 , 19 , 33 )

Type material. CHINA , Tibet: Holotype ♂, 80K (29.66°N, 95.49°E), Motuo County, 2059 m, 7.VIII.2017, coll. Mujie Qi & Xiaofei Yang, slide No. JYY17326 ♂. Paratypes: 5♂, 1♀, 7–9.VIII.2017, slide Nos. JYY17568 ♀, JYY17671 ♂, JYY17668 ♂, other same data as holotype .

Diagnosis. This species can be separated from all the other species of the sakaiella species group by the absence of both uncus and gnathos and the presence of paired setose pediform processes on the posterior margin of the tegumen.

Description. Adult ( Fig. 6 ) wingspan 8.0 mm. Head with vertex orange yellow; frons orange yellow on upper part, greyish ocherous on lower part; occiput dark ferruginous. Labial palpus with first and second segments ocherous yellow, covered with black scales on outer surface, second segment pale orange yellow apically; third segment with basal 2/3 pale orange yellow, distal 1/3 black. Antenna with scape yellow; flagellum yellow alternated with black. Thorax and tegula dark ferruginous. Forewing yellow, tinged with ocherous yellow; basal fascia dark ferruginous mixed with black scales, its outer margin straightly oblique outward, running from before basal 1/4 of costal margin to dorsum; costal spot set between basal 1/3 and 2/3, brownish grey, sub-triangular, exceeding upper margin of cell; distal patch ocherous brown mixed with black scales, diffused along termen to tornus; cilia yellow except blackish grey on distal part of costal margin. Hindwing and cilia greyish brown. Fore- and midlegs black, mid tibia with long yellow scale tuft apically, tarsi yellow at apex of each tarsomere; hindleg yellow ventrally, brown dorsally except each tarsomere yellow distally.

Male genitalia ( Fig. 19 ). Uncus and gnathos absent. Tegumen divided from near posterior margin, posterior half sub-quadrate, anterior half with lateral arms extremely narrowed to apex; posterior margin with a pair of setose pediform processes. Valva with basal 3/5 wide, with a setose digitate process arising from basal 3/5 below costa; distal 2/5 separated, forming two slender, subequally sized lobes: dorsal lobe slightly narrowed to narrowly rounded or pointed apex, setose distally; ventral lobe curved before rounded apex, setose. Juxta simple, tubulose. Saccus very long, approximately 1.7 times length of valva, wide at base, narrowed to about middle, uniformly slender for distal half, rounded at apex. Aedeagus straight, extremely long, approximately 1.4 times length of saccus, uniformly slender except slightly dilated at base; cornuti being two long spines, shorter cornutus straight, about half length of curved longer one.

Female genitalia ( Fig. 33 ). Apophyses anteriores stout, approximately 1/3 length of apophyses posteriores. Eighth tergite sub-rectangular, obtusely rounded on posterior margin; sternite with posterior margin sclerotized and concave at middle. Ostium bursae round. Ductus bursae with basal 3/5 uniformly narrow, distal 2/5 much thickened; ductus seminalis arising from beginning of thickened part. Corpus bursae round, with granules; signum being a largr spine arising from middle of a granulose rhombic basal plate.

Distribution. China (Tibet).

Etymology. This epithet refers to the type locality, Tibet, China.

Figures

FIGURES 5–10. Adults of Promalactis spp. 5. P. campanulata sp. nov., holotype, ♂; 6. P. tibetica sp. nov., holotype, ♂; 7. P. subquadrata sp. nov., holotype, ♂; 8. P. auremacularis sp. nov., paratype, ♂; 9. P. curvitaeniata sp. nov., paratype, ♀; 10. P. lvovskyi sp. nov., holotype, ♂. Scales =1.0 mm

FIGURES 17–20. Male genitalia of Promalactis spp. 17. P. apicidigitata sp. nov., holotype, slide No. JYY17558; 18. P. campanulata sp. nov., holotype, slide No. DZH11040; 19. P. tibetica sp. nov., holotype, slide No. JYY17326; 20. P. subquadrata sp. nov., holotype, slide No. JYY17553. Scales =0.2 mm.

FIGURES 32‒36. Female genitalia of Promalactis spp. 32. P. apicidigitata sp. nov., paratype, slide No. JYY17155; 33. P. tibetica sp. nov., paratype, slide No. JYY17568; 34. P. auremacularis sp. nov., paratype, slide No. MNHU-NK042; 35. P. curvitaeniata sp. nov., paratype, slide No. DZH11053; 36. P. lvovskyi sp. nov., paratype, slide No. TLMF-NK002. Scales =0.2 mm (not available for No. 34).