Promalactis truncatapicalis 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 : 431-432

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

( Figs 26 , 57 )

Type material: Holotype ♂, MALAYSIA, light tower, Liwagu River Trail, Mt. Kinabalu N [ational]P[ark] (6°04'N, 116°36'E), Sabah, Borneo , 1500 m, 10−13.viii.2005, leg. Mey & Ebert, genitalia slide No. MNHU- NK023 ( MNHU).

Description. Imago ( Fig. 26 ) with wingspan 10.5 mm. Head with vertex shining white, frons dark brown, mixed with white medially, occiput brown. Labial palpus with basal and second segments brown intermixed black on outer surface, basal segment pale white on inner surface, second segment ochreous yellow intermixed black on inner surface; third segment black except basal 1/3 and apex white, about same length as second. Antenna with scape white, black at apex on dorsal surface; flagellum white and black on dorsal surface, dark brown on ventral surface. Thorax and tegula ochreous brown. Forewing ochreous brown; costal margin black along basal 1/3, with a basal white fascia from base of costal margin to basal 1/5 of dorsum, second white fascia from about costal 1/3 to basal 3/5 of dorsum, two white fasciae edged with black scales; costal margin with a triangular, white tinged with gray patch at about 2/3, extending down to posterior 2/5, its inner margin with black scales, outer margin scattered with gray and black scales; with a small triangular dark-gray spot before tornus, reaching posterior margin of costal patch, with black scales on its inside; apex with a triangular white spot, margined with dense black scales, scattered with black scales along termen; cilia orange yellow, dark gray along distal part of costal and dorsal margins, tinged with white on costal margin near apex. Hindwing and cilia dark gray. Foreleg black, tibia with a tuft of short white scales at apex, tarsus with white spots on dorsal surface; midleg gray on ventral surface, black on dorsal surface, tibia with a white spot near base, with a tuft of long white scales at apex, tarsus with white spots on dorsal surface; hindleg yellow on ventral surface, gray on dorsal surface, tarsus with white spots on dorsal surface.

Male genitalia ( Fig. 57 ). Uncus heavily sclerotized, basal 1/4 rounded, distal 3/4 club shaped, bent ventrad, forming a sharp angle at basal 1/4, rounded at apex. Gnathos sclerotized, about 1/2 length of uncus, tongue shaped, distal 2/3 scobinate, narrowly rounded at apex; lateral arms short, nearly triangular. Tegumen branched from posterior 3/10, rounded anteriorly. Valva slightly narrow at base, distal half parallel dorso-ventrally, slightly widened apically; apex with dense setae, obliquely truncate; costa projected at middle, with a short finger-like process at middle, with sparse fine spines from basal 1/4 to middle. Sacculus heavily sclerotized, about 3/5 length of valva; basal 2/3 narrow, distal 1/3 broadened; apex rounded, with dense strong spines directing foreward, and with dense, erect, short spines. Vinculum semi-ovally protruded postero-medially, forming a narrow marginal band; saccus about 2/3 length of valva, broad at base, gradually narrowed to 3/5, distal 2/5 slender, rounded at apex. Juxta very narrow, lanciform, projected laterally at base, with an inverted coniform basal handle reaching middle of saccus, apex pointed, reaching posterior 1/4 of tegumen. Aedeagus long and straight, about 1.7 x length of valva, broad basally and distally, apex with one large and several small triangular, sclerotized processes; cornutus indistinct, long and thin, about 1/3 length of aedeagus, hooked apically.

Female unknown.

Diagnosis. This new species is similar to P. spinosicostalis sp. nov., but can be separated by the uncus with distal 3/4 bent ventrad, the costa with sparse spines from basal 1/4 to middle, and the sacculus with dense apical spines in the male genitalia. In P. spinosicostalis sp. nov., the uncus is straight distally, the costa has dense long spines except at base, and the sacculus has no apical spines in the male genitalia.

Distribution. Malaysia (Borneo).

Etymology. The specific name is derived from the Latin truncatus (= truncate) and the Latin apicalis (= apex), referring to the obliquely truncate apex of the valva in the male genitalia.

Figures

FIGURES 25–34. Adults of Promalactis spp. 25, P.superimposita sp. nov., paratype; 26, P. truncatapicalis sp. nov., holotype; 27, P. undulata sp. nov., holotype; 28, P. vulvida sp. nov., holotype; 29, P.diehli Lvovsky; 30, P. mentawirella Lvovsky; 31, P. nabokovi Lvovsky; 32, P. parasuzukiella Wang; 33, P. semantris (Meyrick); 34, P.similiflora Wang(25–31, 33, 34: ♂, 32: ♀).

FIGURES 53–58. Male genitalia of Promalactis spp. 53, P. semiovata sp. nov., holotype, slide No. MNHU-NK006; 54, P. spinosicostalis sp. nov., paratype, slide No. MNHU-NK022; 55, P. strena sp. nov., holotype, 55a, enlarged apical spines of cornutus, slide No. BMNH-33543; 56, P. superimposita sp. nov., holotype, 56a, enlarged apical process of gnathos, slide No. ZMUC-NK002; 57, P. truncatapicalis sp. nov., holotype, slide No. MNHU-NK023; 58, P. undulata sp. nov., holotype, slide No. MNHU-NK002.