Promalactis cruciata Wang, 2020

Wang, Shuxia & Liu, Chen, 2020, Taxonomic study of the genus Promalactis Meyrick, 1908 (Lepidoptera: Oecophoridae) IX. The maculosa species-group, with descriptions of eighteen new species, Zootaxa 4890 (1), pp. 38-66 : 41

Promalactis cruciata Wang , sp. nov.

( Figs 2 , 20 , 37 )

Type material. CHINA, Zhejiang: Holotype ♂, Sanmuping (30.37°N, 119.43°E), Mt. Tianmu , 789 m, 14.VII.2014, leg. AH Yin et al., slide No. HXM14127 . Paratypes: 3♂, 1♀, same data as holotype, slide Nos. HXM14208 ♂, HXM14250 ♀.

Diagnosis. This species can be distinguished from its congeners in the male genitalia by the mesial plate of the gnathos with a long spine-shaped process on each side, and the serrate apex of the valva with a C-shaped shallow concavity.

Description. Adult ( Fig. 2 ). Wingspan 7.5–10.0 mm. Head with vertex dark brown, frons silvery grey or grey-ish brown. Labial palpus with basal and second segments brown on outer surface, yellow on inner surface, with scattered brown scales, with black ring apically; third segment white basally and apically, black medially. Antenna with scape white, dark brown on anterior margin; flagellum black alternated with white on dorsal surface, brown on ventral surface. Thorax deep grey, ochreous yellow distally; tegula deep ochreous brown basally, ochreous grey distally. Forewing pale ochreous yellow, with scattered black scales; markings white bordered by black scales: costal spot large, sub-elliptical, from distal 1/3 reaching posterior angle of cell, with dense black scales at inner and outer sides anteriorly; cell with a stripe from basal 1/4 extending outward to above middle of fold; fold with three spots: basal and distal spots smaller, second spot weakly joined with stripe in cell; dorsum with four evenly spaced stripes, apical stripe smallest or indistinct; apical spot elliptical; terminal spot round, near apical spot; tornus with diffused black scales; cilia dull yellow except grey on dorsum. Hindwing and cilia grey. Fore- and midlegs black, fore femur and midleg brown ventrally, tibiae with a white spot at base and middle, with a tuft of white scales at apex, tarsi white at apices of basal two tarsomeres; hindleg greyish brown except black tarsus white at apices of basal two tarsomeres as well as on fourth and apical tarsomeres.

Male genitalia ( Fig. 20 ). Uncus with basal 3/5 subparallel laterally; distal 2/5 bilobed, each lobe slender, narrowed to pointed apex. Gnathos shorter than uncus; mesial plate cruciate in shape, longitudinally sub-ovate, each side with long spine-shaped process extending outward from middle; basal arm slender, as long as mesial plate. Tegumen divided from posterior 3/5; lateral arm narrowed anteriorly. Valva sub-rectangular; apex serrate, concave medially, forming a triangular dorsal and a ventral lobes as well as a C-shaped shallow concavity; sacculus wide at base, narrowed to basal 2/3, distal 1/3 slightly produced dorsad, densely setose to preapex. Saccus short, subtriangular. Juxta with lateral arm heavily sclerotized on distal 1/4, slightly widened before pointed apex, reaching posterior 1/5 of tegumen apically. Aedeagus straight, about same length as valva; cornutus a long spine, about 4/5 length of aedeagus.

Female genitalia ( Fig. 37 ). Apophyses anteriores about 2/3 length of apophyses posteriores. Ostium bursae rounded. Eighth sternum almost straight on posterior margin, roundly produced anteriorly. Antrum narrow and short. Ductus bursae membranous, slender, with seven strong spines. Corpus bursae membranous; signum absent.

Distribution. China (Zhejiang).

Etymology. The specific epithet of the new species is derived from the Latin cruciatus, referring to the shape of the mesial plate of the gnathos.

Figures

FIGURES 1‒6. Adults of Promalactis spp. 1, P. coloristigmosa, paratype, ♂; 2, P. cruciate, holotype, ♂; 3, P. lateridentalis, holotype, ♂; 4, P. latispinata, holotype, ♂; 5, P. lonchodes, holotype, ♂; 6, P. magnispina, holotype, ♂. Scales = 2 mm.

FIGURES 19‒24. Male genitalia of Promalactis spp. 19, P. coloristigmosa, holotype, slide No. JYY17711, 19a, enlarged cornu- tus, slide No. JYY17804; 20, P. cruciate, holotype, slide No. HXM14127; 21, P. lateridentalis, holotype, slide No. JYY17706; 22, P. latispinata, holotype, slide No. LC19215, 22a, enlarged cornutus; 23, P. lonchodes, holotype, slide No. JYY17733, 23a, enlarged cornutus, slide No. JYY17725; 24, P. magnispina, holotype, slide No. JYY17718. Scales = 0.2 mm.

FIGURES 36‒41. Female genitalia of Promalactis spp. 36, P. coloristigmosa, paratype, slide No. LC19222; 37, P. cruciate, paratype, slide No. HXM14250; 38, P. lonchodes, paratype, slide No. JYY17727; 39, P. bomiensis, paratype, slide No. LC19306; 40, P. fasciserrata, holotype, slide No. JYY17767; 41, P. brevipalpa, paratype, slide No. HXM13120, 41a, enlarged ductus bursae. Scales = 0.2 mm.