Promalactis hamatella 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 : 1679-1686

Promalactis hamatella Kim , sp. nov.

Diagnosis

This species is similar to Promalactis roesleri Lvovksy, 2000a , in the wing pattern, but it can be easily distinguished by the male genitalia with the valva blunt at apex, the juxta with a large hook-shaped lobe, and the aedeagus bearing distinctly developed two cornuti.

Description

Adult ( Figures 2d , 3d ). Head: Frons whitish pale yellowish brown. Vertex white with yellowish brown occiput. Antenna with scape white entirely, as long as diameter of eye; flagellum white and brown alternately dorsally. Labial palpus with yellowish brown of second segment; third segment white basally, tinged with dark brown to apex; third

segment longer than second segment. Thorax: Thorax dark brown. Tegula yellowish brown. Wingspan 9.5–10.0 mm. Fore wing ground colour yellowish brown; three white bands edged with fuscous scales: subbasal band very oblique, nearly straight; antemedian band much broader than subbasal band, from one-quarter of costa to one-third of posterior margin, broadened at both ends; postmedian band connected to costal patch, gradually narrowed toward posterior margin; costal patch at two-thirds, semiovate; a spot at apex, weakly developed; fringes dark brown, except white near apex. Hind wing ground colour pale greyish brown; fringes greyish brown.

Male genitalia ( Figure 4d, 4 da–d). Uncus long, tougue-shaped, wide at base, gradually narrorwed toward sub-apex, with thumb-like apical process. Gnathos inverted bellshaped, wide at base, gradually narrowed toward sub-apex and then straight to apex with blunt caudal margin, rarely setose on lateral margin. Tegumen simple, twice as long as uncus. Valva asymmetrical with blunt apex; costa slightly concave before middle, gradually convex to sub-apex, setose from four-fifths to apex; saccular weakly sclerotized, broad basally and narrowed toward termination, extending tow-thirds of posterior margin, setose from four-fifths to apex. Juxta with large hook-shaped lobe bearing pointed apex, longer than uncus plus tegumen. Saccus funnel-shaped. Aedaegus wide at base, slightly bent before apex. Cornuti two: shorter one one-quarter length of the other; longer one half length of aedeagus; the latter one dividing into two, bifurcate with different length.

Female unknown

Holotype

Male. Northern Sumatra Rd. 28 km, southwest P. Siantar, 1050 m, 17 July 1993, J.B. Heppner, gen. slide no. 9317/ S. Kim.

Distribution

Indonesia (Sumatra: North).

Etymology

The specific name is derived from the Latin hamat - (= hooked), plus the Latin suffix - tella, referring to a large hooked-shaped lobe of juxta in the male genitalia.

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.

Figure 3. Wing pattern 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.