Promalactis diazomatis Kim, 2017

Kim, Sora, Heppner, John B. & Park, Kyu-Tek, 2017, Eight new species of the genus Promalactis (Lepidoptera: Oecophoridae) from Indonesia, with a checklist of the genus, Journal of Natural History 51 (29 - 30), pp. 1671-1695 : 1672-1679

Promalactis diazomatis Kim , sp. nov.

Diagnosis

This new species is superficially similar to Indonesian Promalactis balikpapana Lvovsky, 2000a , but can be easily distinguished by the elongate valva of the male genitalia being deeply concave at two-thirds of costa, upturned apical process and funnel-like saccus. It is also similar to Promalactis ellipsoidea Wang, Du & Li, 2013 , which was described from Brunei, in the fore wing pattern, but can be recognized by the tips of uncus lateral lobes without swelling.

Description

Adults ( Figures 2 (b), 3(b)). Head: Frons greyish dark brown; vertex white basally tinged with greyish dark brown; occiput yellowish dark brown. Antenna with scape white entirely, two-thirds length of diameter of eye; flagellum white dorsally, dark brown ventrally. Labial palpus with second segment yellowish brown; third segment dark brown, longer than second segment. Thorax: Thorax and tegula dark brown. Wingspan 11.5–12.0 mm.

Fore wing ground colour brownish yellow; a white band and two patches edged with fuscous scales: subbasal band oblique toward wing base, traversed from wing base to posterior margin just near wing base; posterior patch semi-circular at one-third, reaching halfway across wing; costal patch at two-thirds, semi-circular, reaching more than halfway across wing, proceeded by fuscous suffusion; dark fuscous suffusion in apical part; fringes greyish brown mixed with fuscous scales from the half of posterior margin to tornus, tinged with brownish yellow around apex. Hind wing ground colour pale greyish brown; fringes pale greyish brown, gradually darker toward apex. Leg. Hind leg pale greyish brown dorsally, except white at basal fourth, third and second segments of tarsus.

Male genitalia ( Figure 4b, 4 ba–c). Uncus heavily sclerotized bearing lateral lobes, twofork-shaped; each tip of lateral lobes equal thickness, not partly swelled. Gnathos absent.

Tegumen simple. Valva elongate with upturned apex, 1.5 times longer than uncus plus tegumen; costal margin of valva slightly concave basally, convex at one-third and then deeply concave two-thirds of costa, densely setose after two-thirds to apex; saccus funnel-shaped, slightly longer than uncus. Aedeagus simple, as long as valva, without cornutus.

Female unknown.

Holotype

Male. Indonesia, Sumatra U., 7 km, southeast Parapat , 1400 m, 30 August 1992, J.B. Heppner & E.W. Diehl, gen. slide no. No. 9308/ S. Kim. Paratype. One male, Sumatra U., 7 km, southeast Parapat, 1400 m, 30 July 1992, J.B. Heppner & E.W. Diehl, gen. slide no. No. 9306/ S. Kim.

Distribution

Indonesia (Sumatra: North).

Etymology

The specific name is derived from the Latin diazomatis (= semi-circular), referring to the two semi-circular white markings in the wing pattern.

Figures

Figure 2. Adult of Promalactis. (a) Promalactis brevivalva; (b) Promalactis diazomatis sp. nov.; (c) Promalactis diehli; (d) Promalactis hamatella sp. nov.; (e) Promalactis ingenticula sp. nov.; (f) Promalactis laetusella sp. nov.; (g) Promalactis latifundus sp. nov.; (h) Promalactis merangirella; (i) Promalactis minutispina sp. nov.; (j) Promalactis mooatana sp. nov.; (k) Promalactis nataliae; (l) Promalactis roesleri; (m) Promalactis sumatrana; (n) Promalactis trigonilancis sp. nov.