Promalactis curvispinosa 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 : 54

Promalactis curvispinosa Wang , sp. nov.

( Figs 16 , 33 , 45 )

Type material. CHINA, Guangxi: Holotype ♂, Mt. Daming (23.53°N, 108.34°E), 1250 m, 28. V.2011, leg. LL Yang & YH Mou, slide No. DZH11035 . Paratypes: 7♂, 3♀, 20–29. V.2018, other data same as holotype, slide Nos. DZH11037 ♀, DZH12211 ♀, DZH12366 ♂, LC19433 ♂.

Diagnosis. This species is diagnostic in the male genitalia by the aedeagus with a single cornutus curved by a right angle at distal 1/3. It is similar to P. aculeiformis sp. nov., and the differences between them are stated in the diagnosis of the latter species.

Description. Adult ( Fig. 16 ). Wingspan 10.0–11.0 mm. Head dark brown, frons yellowish white medially, occiput silvery white. Labial palpus with basal and second segments black mottled with white on inner surface, black on outer surface; second segment white near apex; third segment white tinged with black, slightly shorter than second segment. Antenna with scape black, bearing a white longitudinal median line on dorsal surface, white on ventral surface; flagellum black alternated with white dorsally, dark brown ventrally. Thorax and tegula black basally, dark yellowish brown distally, thorax mixed with white scales apically. Forewing ochreous yellow, greyish black on basal half of costal margin; costal spot black, large quadrate, extending from middle to anterior margin of cell, edged with a white streak on outer margin; distal patch black, sub-triangular, reaching half width of wing posteriorly; other markings white edged with black scales: cell with a spot at base 1/3, basal 2/3, and above posterior angle respectively, and a dot below posterior angle; fold with a short stripe at base, a small spot above middle and at distal 1/4 respectively; dorsum with three stripes: subbasal stripe curved to fold, second stripe from basal 2/5 reaching fold, third stripe extending outward and meeting white stripe at distal 1/4 of fold; apical and terminal spots small, elliptical; tornus with dense diffused black scales, a white dot set before tornus; cilia ochreous yellow except black on extension of distal patch and around tornus, with a few white cilia before tornus. Hindwing and cilia dark grey. Legs black; fore tibia with a white dot at base and middle, with a tuft of white scales apically; mid and hindlegs grey ventrally, mid tibia with a white spot at base, with a tuft of white scales at middle and apex, all tarsi white at apices of basal two tarsomeres.

Male genitalia ( Fig. 33 ). Uncus wide at base, narrowed to basal 3/5, narrow and curved ventrad distally, pointed at apex, median 1/3 sparsely setose laterally. Gnathos slightly shorter than uncus; mesial plate lingulate, basal 1/3 broad, distal 1/3 narrow, with scale-like protuberances on distal 2/5, apex rounded, with a small sub-triangular process; basal arm band-like, shorter than mesial plate. Tegumen short, divided from posterior 2/3; lateral arm narrowed to rounded apex. Valva wide at base, slightly narrowed to rounded apex, dorsodistal area densely setose; costa concave basally, slightly projected medially; sacculus almost uniformly wide, distal 1/3 densely setose, produced to a small apical spine directed dorsad and exceeding tip of costal margin. Saccus about 3/5 length of uncus, parallel laterally, rounded at apex. Lateral arms of juxta with basal 3/10 slightly wide, distal 7/10 gradually narrowed to acute apex, apically reaching posterior margin of tegumen; basal lobe clavate, reaching basal 3/4 length of saccus. Aedeagus straight, about 1.2 times length of valva; cornutus strong, running from before middle to near apex, about half length of aedeagus, basal 1/4 widened sub-elliptically, distal 3/4 a spine curved almost by a right angle at distal 1/3.

Female genitalia ( Fig. 45 ). Apophyses anteriores about 3/5 length of apophyses posteriores. Eighth tergum rectangular. Eighth sternum with sparse setae posteriorly, obtusely rounded on posterior margin, slightly convex medially on anterior margin. Ostium bursae peak-like, horizontally extended anteriorly, with hook-shaped process anterolaterally.Antrum uniformly wide, heavily sclerotized. Ductus bursae membranous except sclerotized laterally to anterior 1/3, with a large, wrinkled elliptical sac in posterior 2/3, its posterior half lined with dense long spines. Corpus bursae sub-spherical, with two densely granular zones; signum absent.

Distribution. China (Guangxi).

Etymology. The specific epithet of the new species is derived from the Latin and refers to the curved cornutus.

Figures

FIGURES 13‒18. Adults of Promalactis spp. 13, P. ramivalvata, holotype, ♂; 14, P. aculeiformis, holotype, ♂; 15, P. apicitriangula, paratype, ♂; 16, P. curvispinosa, paratype, ♂; 17, P. medimacularis, holotype, ♂; 18, P. serraticostalis, holotype, ♂. Scales = 2 mm, except 15 scale = 1 mm.

FIGURES 31‒35. Male genitalia of Promalactis spp. 31, P. aculeiformis, holotype, slide No. DZH11036; 32, P. apicitriangula, holotype, slide No. JYY17715, 32a, enlarged cornutus, slide No. JYY17714; 33, P. curvispinosa, holotype, slide No. DZH11035; 34, P. medimacularis, holotype, slide No. JYY17800; 35, P. serraticostalis, holotype, slide No. DZH12115, 35a, enlarged cornutus. Scales = 0.2 mm.

FIGURES 42‒48. Female genitalia of Promalactis spp. 42, P. libona, paratype, slide No. JYY17722, 42a, enlarged signa, slide No. JYY17723; 43, P. medilargissima, paratype, slide No. LC19429; 44, P. ramivalvata, paratype, slide No. LC19438, 44a, enlarged ductus bursae; 45, P. curvispinosa, paratype, slide No. DZH11037; 46, P. medimacularis, paratype, slide No. JYY17829; 47, P. serraticostalis, paratype, slide No. DZH12114; 48, P. tricuspidata Wang et Li, 2004, slide No. JYY17977. Scales = 0.2 mm.