Promalactis latuncata Wang, Du & Li, 2013

Wang, Shuxia, Du, Zhaohui & Li, Houhun, 2013, Taxonomic study of the genus Promalactis Meyrick, 1908 from Southeast Asia (Lepidoptera: Oecophoridae), Zootaxa 3669 (4), pp. 401-455 : 419-420

Promalactis latuncata Wang, Du & Li , sp. nov.

( Figs 13 , 47 )

Type material: Holotype ♂, THAILAND, Khao Yai N [ational]P[ark] (12°49'N, 99°56'E), [Nakhon Nayok], 1200 m, 17.iv.1987, leg. M. G. Allen, BM 1986−300, genitalia slide No. BMNH-33565 ( BMNH) . Paratypes: 3 ♂, same data as holotype, genitalia slide No. BMNH-33564 ( BMNH) .

Description. Imago ( Fig. 13 ) with wingspan 10.0−12.5 mm. Head with vertex shining white, frons dark brown, occiput dark ochreous brown. Labial palpus with basal and second segments ochreous yellow on inner surface, ochreous brown on outer surface, third segment dark ochreous brown, longer than second. Antenna with scape white; flagellum with basal 2/3 white, distal 1/3 white and black on dorsal surface, dark brown on ventral surface. Thorax and tegula dark ochreous brown. Forewing with basal 2/3 ochreous brown, distal 1/3 light ochreous brown; costal margin grayish black along basal 2/3; dorsal margin with a white streak straightly extending from basal 2/5 to lower margin of cell, edged with black scales, with a nearly ovate white spot before tornus, edged with black scales; apex with an irregular dark-gray patch, margined with black scales; cilia orange, gray at base along termen, dark gray along distal part of costal and dorsal margins. Hindwing and cilia dark gray. Foreleg black, tarsus with white spots on dorsal surface; midleg pale on ventral surface, grayish black on dorsal surface; hindleg yellowish white on ventral surface, grayish black on dorsal surface, tarsus with white spots on dorsal surface.

Male genitalia ( Fig. 47 ). Uncus large and very broad, sclerotized, narrowly folded inward laterally with sparse, long setae; basal 1/3 broad and almost parallel laterally, narrowed to 2/3, distal 1/3 almost parallel laterally and triangularly overlapped, concave in V shape at middle on posterior margin, forming two digitate lateral processes. Gnathos consisting of two elongate lateral lobes connected at base by membrane, basal 3/5 broad, with an ovate cluster of dense, short spines, distal 2/5 slender, digitate, slightly bent upward, dentate at apex. Tegumen branched from near posterior margin, narrowly rounded anteriorly. Valva sclerotized and broad, subtriangular, with a strong, sinuate, long basal process from base at middle reaching costa before apex, broad basally and distally, serrated and with a short spine apically; costa with a broad basal band extending inward, triangularly folded apically. Sacculus well developed, with basal 1/2 very broad, about ovate, constricted at middle, then gradually widened to near apex, distal half densely with setae, distal process beak shaped, with a spine directing upward apically. Saccus slightly shorter than uncus, broad basally, abruptly narrowed to 1/3, distal 2/3 gradually narrowed to rounded apex. Juxta sclerotized, with anterior portion elongate and curved, columned, gradually narrowed to rounded apex; posterior portion small, petal-like, bifurcate distally, rounded at apex. Aedeagus curved, about 1.3 x length of valva, basal half broad, distal half slightly thin, roundly pointed at apex; cornutus absent.

Female unknown.

Diagnosis. This new species can be separated from its congeners by the forewing only with a white streak and an ovate white spot arising from dorsum; by the gnathos with an ovate cluster of short spines basally, the valva having a strong, sinuate basal process reaching costa before apex and the juxta with posterior portion petal-like in the male genitalia.

Distribution. Thailand (Nakhon Nayok).

Etymology. This specific name is derived from the Latin prefix lati- (= broad) and the Latin uncatus (= uncus) referring to the very broad uncus in the male genitalia.

Figures

FIGURES 9–16. Adults of Promalactis spp. 9, P.flagellaris sp. nov., holotype; 10, P.foraminulata sp. nov., holotype; 11, P. fortijuxtalis sp. nov., paratype; 12, P.lancea sp. nov., paratype; 13, P.latuncata sp. nov., holotype; 14, P. longisaccata sp. nov., holotype; 15, P. longisaccata sp. nov., paratype, showing the variation of dorsal spot; 16, P. lophacantha sp. nov., holotype (9– 11, 13–16: ♂, 12: ♀).

FIGURES 47–52. Male genitalia of Promalactis spp. 47, P. latuncata sp. nov., holotype, slide No. BMNH-33565; 48, P. medispinata sp. nov., holotype, slide No. MNHU-NK001; 49, P. lophacantha sp. nov., holotype, slide No. BMNH-33550; 50, P. palmifolia sp. nov., holotype, slide No. BMNH-33541, 50a, showing the variation of the juxta, slide No. BMNH-33542; 51, P. pectinifera sp. nov., holotype, slide No. BMNH-33534; 52, P. sectoralis sp. nov., holotype, 52a, enlarged distal process of aedeagus with dense spines, slide No. BMNH-33539.