Promalactis simingshana, Wang & Liu, 2020

Wang, Shuxia & Liu, Chen, 2020, Taxonomic study of the genus Promalactis Meyrick, 1908 (Lepidoptera: Oecophoridae) VIII. The densimacularis species group, with descriptions of four new species, Zootaxa 4748 (1), pp. 78-86 : 78-86

Promalactis simingshana sp. nov.

( Figs. 1 , 5 , 9 )

Type material. CHINA, Zhejiang: Holotype ♂, Mt. Siming (29.73°N, 121.08°E), 843 m, 30. VI.2017, coll. ZG Zhang, YY Jia and J Li, slide No. JYY17798 . Paratypes: 4♂ 2♀, Ganzhuling, Simingshan, Yuyao , 853 m, 24‒ 25.VII.2015, coll. AH Yin, K Lou and T Wang, slide Nos. JYY17830 ♂, JYY17832 ♀, JYY17833 ♀, LC19270 ♂.

Diagnosis. The species is similar to P. quinilineata Wang, Kendrick et Sterling, 2009 in the features of the male genitalia. It can be distinguished from P. quinilineata in the male genitalia by the left lateral arm of the juxta having a strong spine-like process at about distal 1/6, and by the aedeagus being produced to a papillary apical process; in the female genitalia, by the absence of the lamella postvaginalis, and by the ductus bursae having long spines arranged in a semicircle; in the male genitalia of P. quinilineata , each of the symmetrical lateral arms has a sclerotized process near base, and the aedeagus is produced to an apical spine; in the female genitalia, the lamella postvaginalis is developed and the ductus bursae has thumbtack-like spines and a tuft of longer spines. The new species is also similar to P. yongjiana sp. nov., and the differences between them can be found in the diagnosis of the latter species.

Description. Adult ( Fig. 1 ). Forewing length 4.0‒5.0 mm. Head with frons cream white, vertex and occiput tuft brown except cream white laterally. Labial palpus with second segment white on inner surface, black on outer surface except white apically; third segment black, white at base and apex. Antenna with scape yellowish white, mixed with black on dorsal surface apically; flagellum blackish brown on ventral surface, yellow annulated with blackish brown on dorsal surface. Thorax and tegula blackish brown. Forewing ochreous yellow; costal margin with three large black patches: basal patch rectangular, extending obliquely outward, edged with a white line on outer margin extending to middle of cell; median patch sub-quadrate, across upper margin of cell posteriorly, edged with a white line on outer margin extending to above lower angle of cell; distal patch sub-triangular; fold with a small white spot at base; dorsum with two straight white streaks from basal 2/5 and 4/5 respectively, parallel and oblique outwardly to above lower margin of cell, joined by a white line that extends to lower angle of cell and meets the white line from outer margin of median patch, these three white lines forming a square-shaped dorsal pattern edged with dense black scales along inner margin; tornus with a small black diffused spot; apex with a white dot; termen black, with a white dot; cilia blackish brown along distal part of costal margin, remaining cilia ochreous yellow, tinged with sparse black scales on tornus. Hindwing and cilia deep grey. Foreleg with femur greyish black, tibia and tarsus black, tibia with white spot on dorsal surface basally and medially, with a tuft of white scales apically, tarsus white at base and apex of basal tarsomere as well as at apices of second and distal tarsomeres; midleg with femur greyish brown, tibia and tarsus blackish brown on outer surface, grey on inner surface, tibia with a white spot at base, with long white scales at middle and apex on dorsal surface, tarsus white at base and apex of basal tarsomere as well as at apices of second and distal tarsomeres; hindleg greyish yellow on inner surface, blackish brown on outer surface, tarsus faint yellow at apex of each tarsomere.

Male genitalia ( Fig. 5 ). Uncus wide at base, slightly narrowed to basal 2/5, abruptly narrowed at basal 2/5, then uniform to pointed apex, beak-shaped distally. Gnathos almost as long as uncus; gnathos plate elongate narrow, subrectangular, scaly on anterior 1/3, with an elongate membranous process apically; lateral arm relatively short. Valva sub-rectangular, bilobed distally: dorsodistal lobe triangular, setose, pointed at apex; ventrodistal lobe produced to a strong upcurved apical spine. Sacculus equally narrow, setose and fused with ventral lobe of valva distally. Juxta reaching base of uncus; lateral arm very strong, sharply produced from distal 1/6 to acute apex, asymmetrical: left arm with a heavily sclerotized process arising from outer margin at about distal 1/6; right lateral arm smooth, slightly arched outward at distal 1/3. Saccus about same length as uncus, subparallel to before rounded apex. Aedeagus almost as long as juxta, straight, thickened from base to distal 1/4, then abruptly narrowed and produced to a small papillary apical process; cornutus slender, about 1/4 length of aedeagus.

Female genitalia ( Fig. 9 ). Apophyses anteriores about 3/5 as long as apophyses posteriores. Eighth sternum sub-rounded, with setae posteriorly. Ductus bursae with posterior half sclerotized, smooth; anterior half enlarged, membranous, with longitudinal pleats, with many long spines arranged in an ovate circle. Corpus bursae small, rounded; signum absent.

Distribution. China (Zhejiang).

Etymology. The specific epithet of this new species is from the type locality, Mt. Siming.

Figures

FIGURES 1‒4. Adults of Promalactis spp. 1, P. simingshana, holotype, ♂; 2, P. costispinata, holotype, ♂; 3, P. trimaculata, holotype, ♂; 4, P. yongjiana, holotype, ♂. Scales=2 mm.

FIGURES 5‒8. Male genitalia of Promalactis spp. 5, P. simingshana, holotype, slide No. JYY17798; 6, P. costispinata, holotype, slide No. JYY17794; 7, P. trimaculata, holotype, slide No. DZH12109; 8, P. yongjiana, holotype, slide No. LC19159. Scales=0.2 mm.

FIGURES 9‒10. Female genitalia of Promalactis spp. 9, P. simingshana, paratype, slide No. JYY17833; 10, P. trimaculata, paratype, slide No. DZH12120. Scales=0.2 mm.