Promalactis yongjiana, 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 yongjiana sp. nov.

( Figs. 4 , 8 )

Type material. CHINA, Zhejiang: Holotype ♂, Longwantan (28.22°N, 120.52°E), Yongjia County, 127 m, 22.VIII.2018, coll. S Yu, MR Xing and C Liu, slide No. LC 19159 . Paratypes: 11♂, 20‒23.VIII.2018, other same data as holotype, slide Nos. LC 19151, LC19152, LC19267, LC19282 .

Diagnosis. The species is similar to P. simingshana sp. nov. in the features of the forewing pattern and the male genitalia. It is hardly distinguishable from the latter species superficially, but their male genitalia are separable. In P. yongjiana sp. nov., the valva is ovate dorsodistally, the left juxta arm has a papillary process at its distal 1/4, and the aedeagus is produced to an apical spine; in P. simingshana sp. nov. the valva is triangular dorsodistally, the left juxta arm has a strong spine-like process at its distal 1/6, and the aedeagus is produced to a papillary apical process.

Description. Adult ( Fig. 4 ). Forewing length 3.5‒4.0 mm. Head with frons yellow, vertex and occiput tuft brown except yellow 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 yellow, flagellum annulated with blackish brown on dorsal surface. Thorax and tegula blackish brown. Wing color and patterns same as those of P. simingshana sp. nov. as described above.

Male genitalia ( Fig. 8 ). Uncus wide at base, slightly narrowed to about middle, then slightly narrowed to point- ed apex. Gnathos shorter than uncus; gnathos plate shrunken laterally before apex, then widened to obtuse apex, scaly distally, with a membranous process apically. Valva sub-rectangular, broad ovate dorsodistally, rounded api- cally; costa short, about 1/2 length of sacculus. Sacculus equally narrow, produced to a strong upcurved apical spine free from valva, densely setose before base of apical spine. Juxta reaching near base of uncus; lateral arm strong, uniform, slightly narrowed from preapex to narrowly rounded apex; asymmetrical: left lateral arm with a heavily sclerotized papillary process arising from outer margin at about its distal 1/4. Saccus longer than uncus, subparallel to rounded apex. Aedeagus almost as long as juxta, slender, distally produced to a strong spine; cornutus slender, about 1/6 length of aedeagus.

Female unknown.

Distribution. China (Zhejiang).

Etymology. The specific epithet of this new species is from the type locality, Yongjia County, Zhejiang.

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.