Promalactis brevipalpa 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 : 48

Promalactis brevipalpa Wang , sp. nov.

( Figs 10 , 27 , 41 )

Type material. CHINA, Guangdong: Holotype ♂, Mt. Dadong (24.77°N, 112.68°E), 650 m, 22. VI.2004, leg. DD Zhang, slide No. DZH12288 . Paratypes (5♂, 4♀): Zhejiang: 3♂, 1♀, Yanping, Mt. Jiulong , 530 m, 4.VII.2013, leg. AH Yin & XC Wang, slide Nos. HXM13116 ♂, HXM13056 ♂, HXM13120 ♀; 2♂, 2♀, Huantanyu, Mt. Jiulong , 467 m, 3–9.VII.2013, leg. AH Yin & XC Wang, slide Nos. HXM13129 ♂, HXM13133 ♂, HXM13134 ♀; Guizhou : 1♀, Mt. Foding, Shiqian , 582 m, 20.VII.2019, leg. MR Xing et al., slide No. LC19206 .

Diagnosis. The new species can be distinguished from its congeners by the labial palpus with the third segment about half the length of the second segment; in the male genitalia, by the costa produced to a large spine-shaped process curved downward, and the sacculus produced to a large triangular distal process directed dorsad.

Description. Adult ( Fig. 10 ). Wingspan 9.0–11.0 mm. Head dark brown. Labial palpus with basal and second segments dark brown; third segment black except basal 1/3 and apex white, very short, about half length of second segment. Antenna with scape white except black terminally on dorsal surface; flagellum black alternated with white dorsally, dark brown ventrally. Thorax and tegula rust brown. Forewing ochreous brown; markings white edged with black scales: costal spot placed medially, crossing anterior angle of cell, with a small black spot on inner margin and a large black patch on outer margin anteriorly, with scattered black scales below; fold with a short fine streak at base; cell with a horizontally straight streak, running from basal 1/5 to 1/3; dorsum with three fine streaks: first streak from basal 1/6 oblique inward to below base of fold, second streak from basal 1/3 slightly oblique outward to streak in cell, forming a right angle with it, third streak from beyond middle oblique outward to basal 2/3 of posterior margin of cell, then curved obliquely outward and weakly arched to above end of fold; apical spot ovate; terminal spot elliptical, circled by dense black scales; tornus with diffused black scales, with a white dot in middle; cilia ochreous brown, tinged with black around tornus. Hindwing and cilia grey. Fore- and midlegs black, femora brownish grey ventrally, tibiae with a white spot at base and middle, with a tuft of white scales at end, tarsi white at apices of basal two tarsomeres; hindleg yellowish brown ventrally, greyish black dorsally, tarsus black except white at apices of each tarsomere.

Male genitalia ( Fig. 27 ). Uncus campaniform, wide at base, narrowed to basal 3/5, then abruptly narrowed to pointed apex. Gnathos as long as uncus; mesial plate short lingulate, with scale-like protuberances, with a membranous sub-oval apical process; basal arm very short, band-shaped. Tegumen divided from posterior 3/5; lateral arm rounded at apex. Valva with dorsal and ventral margins almost parallel, with a sclerotized longitudinal fold from below base of costa slightly oblique outward to distal 1/3 of dorsum; costa distally setose, produced to a large spine-shaped process curved downward; sacculus wide at base, narrowed to middle, distal half uniformly narrow, produced to a heavily sclerotized triangular distal process curved dorsad, forming a right ventroapical angle, serrate on inner margin, obliquely straight on outer margin, pointed at apex, reaching costa apically. Saccus about 1.3 times length of uncus, broad at base, narrowed to pointed apex. Juxta sub-rhombical, with heavily sclerotized edges; lateral arm with a short digitate process at basal 2/3; basal lobe clavate. Aedeagus straight, about 1.6 times length of valva; with two spine-shaped cornuti: cornutus at middle strong, slightly curved, about half length of aedeagus, cornutus from before apex short, with denticles basally.

Female genitalia ( Fig. 41 ). Apophyses anteriores about 3/5 length of apophyses posteriores. Eighth sternum sub-rectangular. Ostium bursae large, sub-triangular; posterior margin almost straight, produced to a triangular process laterally; anterior margin narrowed roundly; sclerotized narrow lateral band extending from near posterior margin of ostium bursae to anterior margin of seventh sternum. Antrum wider than ductus bursae. Ductus bursae widened basally, with some needles. Corpus bursae elongate elliptical, 4/5 length of ductus bursae; signum absent.

Distribution. China (Guangdong, Guizhou, Zhejiang).

Etymology. The specific epithet of the new species is derived from the Latin brevis and palpus, referring to the very short third segment of the labial palpus.

Figures

FIGURES 7‒12.Adults of Promalactis spp. 7, P. plicata, holotype, ♂; 8, P. bomiensis, paratype, ♂; 9, P. fasciserrata, holotype, ♀; 10, P. brevipalpa, holotype, ♂; 11, P. libona, holotype, ♂; 12, P. medilargissima, holotype, ♂. Scales = 2 mm.

FIGURES 25‒30. Male genitalia of Promalactis spp. 25, P. plicata, holotype, slide No. JYY17788; 26, P. bomiensis, holotype, slide No. LC19226, 26a, enlarged cornutus; 27, P. brevipalpa, holotype, slide No. DZH12288, 27a, enlarged cornutus; 28, P. libona, holotype, slide No. JYY17787, 28a, enlarged cornutus; 29, P. medilargissima, holotype, slide No. LC19307, 29a, enlarged cornutus; 30, P. ramivalvata, paratype, slide No. DZH10184. 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.