Promalactis retusa Kim

Kim, Sora, Bae, Yang-Seop & Lee, Seunghwan, 2019, Four new species and seven new records of Promalactis Meyrick, 1908 (Lepidoptera, Oecophoridae) from Laos, ZooKeys 900, pp. 69-86 : 78-80

Promalactis retusa Kim sp. nov. Figures 2K , 5 J–N

Type material.

Holotype: ♂, Laos, Bolikhamsai prov., Thaphabath, Phaset, 21 February 2013, Kim et al., gen. slide no. 9508/ S. Kim. Paratype: 1 ♂, same locality, data as holotype and collector. [Holotype and paratype are deposited in SNU.]

Diagnosis.

This species is externally similar to P. crassa sp. nov. in its wing pattern, but it can be easily recognized in having the costal and apical patches not large in the forewing. The male genitalia are differentiated by the inverted funnel-shaped uncus and the rectangular gnathos with blunt apex.

Description.

Adult ( Fig. 2K ). Head: frons and vertex grayish dark brown; occiput grayish dark brown. Antenna: scape dark brown dorsally, white ventrally, shorter than diameter of eye; fragellum dark brown dorsally. Labial palpus: 2nd palpomere pale yellowish brown, except dark brown at apex dorsally, 1.5 times longer than 3rd palpomere; 3rd palpomere dark brown, except white at base dorsally. Thorax: thorax grayish dark brown partly mixed with whitish scales; tegula dark grayish brown. Wing expanse 8.0-8.5mm. Forewing ground color yellowish brown tinged with grayish dark brown near wing base, middle, and sub-apex on costa; five bands, one costal patch, four spots, and one apical patch, all white edged with fuscous scales: two subbasal bands, one from Sc vein, oblique toward apex, the other from anal vein, oblique toward costa, both connected to each other; two antemedial bands at 1/5, 2/7 of posterior margin, short, oblique toward costa; one antemedial band at 1/3 of costa, oblique toward before tornus; two spots medially, one on posterior vein of medial cell, the other at 1/2 of posterior margin; one costal patch, not connected to under tiny spot on posterior vein of medial cell; one spot at tornus; one apical patch occupied after 6/7 to apex with fuscous scales; fringes yellow near apex, mixed with fuscous scales middle and near tornus. Hindwing more lanceolate; ground color pale grayish dark brown; fringes grayish brown.

Male genitalia ( Fig. 5 J–N ) Uncus inverted funnel-shaped, wide at base, gradually narrowing to apex, slightly bent inward, longer than gnathos. Gnathos rectangular, concave laterally, blunt apically, gradually narrowed from base to 1/2, gradually broadened from 1/2 to apex. Tegumen simple, as long as uncus. Valva symmetrical; costal margin straight to apex, roundly edged, setose after middle; saccular margin moderate, gradually narrowed to apex, apex bearing tiny spine, setose after middle. Saccus short, finger-shaped, shorter than uncus. Aedesgus gradually broader to apex, as long as valve; cornutus sclerotized, bifurcate after middle.

Female unknown.

Distribution.

Laos (northeast; new).

Etymology.

The name of species is derived from the Latin, retus (= blunt) and the suffix -a, referring from the gnathos with blunt apex of male genitalia.

Figures

Figure 2. Wing pattern of Laos Promalactis A Promalactis parasuzukiella B P. suzukiella C P. uniclavata sp. nov. D P. albisquama E P. spiraliola F P. senispina sp. nov. G P. apicisetifera H P. zolotuhini I P. bitrigona J P. crassa sp. nov. K P. retusa sp. nov.

Figure 5. Genitalia of Laos Promalactis A-D P. zolotuhini: A male genitalia B aedeagus C uncus and gnathos D cucullus E-I P. crassa sp. nov.: E male genitalia F aedeagus G uncus and gnathos H apical part of valva I cornutus and spine of aedeagus J-N P. retusa sp. nov.: J male genitalia K aedeagus L uncus and gnathos M apical part of valva N cornutus. Scale bar: 0.5 mm.