Promalactis petasumella Kim, 2018

Kim, Sora, Bae, Yang-Seop & Lee, Seunghwan, 2018, Genus Promalactis Meyrick (Lepidoptera: Oecophoridae) from Cambodia, Part II: five new species, checklist and taxonomic key for the species in Cambodia, Journal of Natural History 52 (9 - 10), pp. 607-620 : 617-619

Promalactis petasumella Kim sp. nov.

( Figures 1 (i), 1(j), 2(m–o), 3(e–g))

Diagnosis

This species is similar to P. ceratiscus sp. nov. in the forewing pattern, but it can be easily distinguished from the latter by the antemedial band oblique toward wing base and the presence of an apical patch. The male genitalia are similar to those of P. ceratiscus sp. nov., by sharing large and bifurcate lobes of juxta, but differs from this species by having the lateral margin of lobe of the juxta bearing a projection at middle.

Description

Adult ( Figure 1 (i), 1(j)). Head: Frons blackish dark brown; vertex white basally, tinged with pale greyish brown; occiput blackish dark brown. Antenna: Scape white entirely, 1/2 length of diameter of eye; fragellum dark brown and white alternately dorsally. Labial palpus: 2nd palpomere pale greyish dark brown; 3rd palpomere blackish dark brown, slightly shorter than 2nd palpomere. Thorax: Thorax and tegula blackish dark brown, latter tinged with brown. Wing expanse 8.0– 8.5 mm. Forewing ground colour brownish yellow; four bands all white, edged with fuscous scales: subbasal band relatively narrow, slightly arched toward wing base, reaching to costal margin; antemedial band slightly oblique toward wing base, not reaching costal margin; medial band oblique toward apex, 1/2 length of antemedial band, connected to postmedial band; postmedial band oblique toward wing base, as long as medial band; two white patches, edged with fuscous scales: costal patch at 1/2, darker near costa, reaching beyond half across wing, semi-ovate; apical patch semi-ovate, occupied from sub-apical costa to tornus followed by termen; fringes greyish dark brown tinged with yellow near apex. Hind wing sub-lanceolate; ground colour pale greyish brown; fringes greyish brown.

Male genitalia ( Figure 2 (m–o)). Uncus large, broadly rounded apically, incised apically, forming two lateral lobes. Gnathos wide at base, up-turned at 1/2, gradually narrowed to apex, short, tongue shaped, slightly longer than uncus. Valva with costal margin slightly concave before middle; cucullus at 3/5 of costal margin, wide at base, straight from base to 1/2, gradually narrowed from 1/2 to sub-apex, apex spine-shaped; sacculus elongate, finger-shaped, setose from 4/5 of costal margin to apex; juxta large, bifurcate medially forming two large lobes, as long as valva: the lobe with lateral margin covered by dense setose from middle to apex, bearing projection in middle. Saccus large, triangular. Phallus slightly bent at middle, as long as valva. Cornutus absent.

Female genitalia ( Figure 3 (e–g)). Papillae anales setose. Apophyses posteriores more than 1.5 times longer than apophyses anteriores. Apophyses anteriores as long as papilla anales. Lamella postvaginalis large, sclerotized, incised caudal-medially, hat-shaped, bearing small thumb-shaped projection sub-apically. Lamella antevaginalis large, sclerotized, both sides of antrum forming projection elongated. Antrum broad cylindrical-shaped, rather straight to ductus bursae, as long as 3/5 of apophyses posteriores. Seventh sternum bearing sclerotized, long-oval projection anteriorly. Ductus bursae wider, slightly longer than antrum. Corpus bursae ovate, bearing a signum; signum bearing several different sized spines.

Holotype

Male, Cambodia, Pursat Prov. Sam Kos, 20 February 2012, Bae et al., gen. slide no. 9599. Paratypes. One male and one female, Cambodia, Pursat Prov. Sam Kos , 644 m, 23 December 2014, Bae et al., gen. slide no. 9606(M)/ S Kim; one male, two females and one ex(missing abdomen)., same locality, 20 February 2012, Bae et al., gen. slide no. 9605(F)/ S Kim.

Etymology

The species epithet, petasumella , is derived from the Latin, petasum- (=hat) and - ella (=Latin diminutive suffix), referring to the hat-shape of the lamella antevaginalis and postvaginalis of the female genitalia.

Distribution

Cambodia (West: new).

Figures

Figure 1. Adult of Promalactis. Promalactis ceratiscus sp. nov.: (a) head; (b) wing pattern. P. flavidius sp. nov.: (c) head; (d) wing pattern. P. latifasciata sp. nov.: (e) head; (f) wing pattern. P. mecodigita sp. nov.: (g) head; (h) wing pattern. P. petasumella sp. nov.: (i) head; (j) wing pattern.

Figure 2. Male genitalia of Promalactis. (a-c) Promalactis ceratiscus sp. nov.; (d-f) P. flavidius sp. nov.; (g-i) P. latifasciata sp. nov.; (j-l) P. mecodigita sp. nov.; (m-o) P. petasumella sp. nov.

Figure 3. Female genitalia of Promalactis. (a-d) Promalactis flavidius sp. nov.; (e-g) P. petasumella sp. nov.